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31	Aquatic Ecology and Conservation (International)	ABS-261
Growth, Mortality, and Exploitation Rate of Bungo Fish,Glossogobius giuris (Buchanan, 1822) in Lapompakka Lake, Wajo Regency South Sulawesi Hadiratul Kudsiah- Nurul Fachirah- Sri Wahyuni Rahim- Suwarni- Budiman Yunus- Andi Aliah Hidayani- Wilma Moka Department of Fisheries, Faculty of Marine Science and Fisheries, Hasanuddin University, Makassar, Indonesia Abstract This research aims to analyze several parameter dynamic populations of Bungo Fish in Lampopakka Lake, Wajo Regency. The research was done from August to October 2020. Fish samples were obtained from fishermen catching in Lampopakka lake and were analyzed in Fisheries Biology LaboratoryUniversitasHasanuddin, Makassar. Total samples were 837 individuals, male 639 individuals and females 198 individuals. Total length weight for male Bungo fish is 97-273 mm, divided into 3 age class: 124,8 mm, 178,92 mm and 230,72 mm.Total length weight for female Bungo fish is 100-246 mm, divided into 4 age class: 125,53 mm, 164,32 mm, 195,1 mm and 227,48 mm. Asymptote length (L&#8734-) for male fish = 284,5 mm with growth coefficient (K) = 0,15/year and t0 = -0,2123/year. Female fish^s (L&#8734-) = 258,5 mm with growth coefficient (K) = 0,46/ year and t0= -1,1524/year. Total mortality rate for male (Z) = 1,38/year and female 1,41/year, natural mortality (M) = 0,28/year for male and 0,59/year for female, catch mortality (F) for male = 1,10 and for female 0,82/year, exploitation (E) for male = 0,80 and 0,58 for female andYield per Recruitment Relativefoe male = 0,0426 and for female 0,0556. Conclusion Bungo fish in Lampopakka Lake are slow growth and suspected to have experience overfishing. Keywords: Glossogobius giuris, growth, mortality, Lapompakka Lake Share Link | Plain Format | Corresponding Author (Sri Wahyuni Rahim)

32	Aquatic Ecology and Conservation (International)	ABS-262
Early warning system for algal blooms using satellite imageries in Jakarta Bay Tumpak Sidabutar (1), E S Srimariana (2), H Cappenberg (1) and S Wouthuyzen (1) 1Research Centre for Oceanography, BRIN Jl. Pasir Putih I, Jakarta 14430, Indonesia 2Faculty of Fisheries, IPB University Campus Darmaga, Bogor 16680, Indonesia Abstract Jakarta bay receives a lot of nutrients input from various sources such as agriculture, industries, domestic waste, and urban waste, and consequently results in eutrophication. The availability of nitrate and phosphate in the waters continuously may result in the waters becoming nutrients rich as is known as eutrophication. Coastal eutrophication and harmful algal blooms (HAB) have been identified as a major problem in Jakarta bay in the last decades. Coastal eutrophication is often associated with the occurrences of algal bloom or red tide. The study was conducted by monitoring the concentration of chlorophyll-a as an indicator of eutrophication using Terra and Aqua MODIS (Moderate-resolution Imaging Spectroradiometer) satellite data from 2004 to 2007. It was reported that during this period there were massive fish killings due to algal bloom events. Fish killed were correlated to the algal bloom occurrences, which were indicated by high chlorophyll-a concentration exceed than 10 mg/m3 and covering more than a quarter of the bay. However, sometimes there were no massive fish mortalities occurred although stronger and more intense algal blooms were detected. Mass mortalities of fishes were primarily due to the oxygen depletion after the highest peak of bloom. Also, another important key factor connected with massive fish-killing is the condition of weak water mass circulation or movement during the bloom events. The use of satellite imageries for monitoring is a very useful tool for the development of the early warning system of algal blooms in Jakarta Bay. Keywords: Algal blooms, satellite imagery, fish-killing, early warning system Share Link | Plain Format | Corresponding Author (Tumpak Sidabutar)

33	Aquatic Ecology and Conservation (International)	ABS-263
Growth patterns and condition factors of bungo fish Glossogobiusgiuris (Buchanan, 1822) were caught in Lake SidenrengRappang, SidenrengRappang Regency, South Sulawesi Hadiratul Kudsiah, Sri Haslina, Suwarni, Sri Wahyuni Rahim, Dwi Fajriyati Inaku Faculty of Marine Science and Fisheries, Hasanuddin University, Makassar, Indonesia Jln. Perintis Kemerdekaan Km 10, Makassar, 90245 Abstract Bungo fish is one of the potential fishery resources in Sidenreng Regency which has decreased due to continuous fishing. Therefore, information on fisheries biology is needed to support the management of Bungo fish resources in order to create sustainable fishing. This study aims to analyze the growth patterns and condition factors of Bungo fish based on gender, observation time and gonad maturity level. The use of this research as a source of information on the management of Bungo fish, especially in Lake Sidenreng. This research was conducted for 3 months, from September to November 2020. Sampling was obtained from 2 bungo fish fishermen in Sidenreng Lake, SidenrengRappang Regency, South Sulawesi. The number of bungo fish samples obtained during the study was 235, consisting of 163 male bungo fish and 72 female bungo fish. Based on the results of research that has been done, the growth pattern of male and female Bungo fish is negative allometric, namely the increase in body length is faster than the increase in body weight of the fish. The condition factors of male bungo fish and female bungo fish are classified as fish in good condition. Bungo fish condition factors based on the sampling time of male and female bungo fish in November and September were classified as not flat or plump fish, while in October male and female bungo fish were classified as flat or not fat fish, while the condition factor Based on gender, Bungo fish males and females are classified as fish that are not flat or plump. TKG male fish have a relatively smaller average condition factor than female bungo fish in each of the same TKG Keywords: Bungo fish, growth pattern, condition factors and gonad maturity level, Sidenreng Lake Share Link | Plain Format | Corresponding Author (Sri Wahyuni Rahim)

34	Aquatic Ecology and Conservation (International)	ABS-264
The Length Weight Relationship and Condition Factors of tank goby Glossogobius giuris Hamilton, 1822 in Lapompakka Lake, Wajo Regency, South Sulawesi Suwarni1 , Farah Nilamsari Kadir1, Joeharnani Tresnati1, Hadiratul Kudsiah1, Sri Wahyuni Rahim1 Faculty of Marine Science and Fisheries, Hasanuddin University, Makassar, Indonesia Jln. Perintis Kemerdekaan Km 10, Makassar, 90245 Abstract Lapompakka lake is one of the inland waters located in Tanasitolo District, South Sulawesi. Tank goby is one of the main commodity fish in Lake Lapompakka.This study aims to analyze the length-weight relationship and condition factors based on sex, observation time, and gonad maturity level of tank goby. The results of this study are expected to provide information on growth patterns and conditions of tank goby so that they are useful in determining sustainable management and utilization efforts. This research was conducted for three months (September - November). Tank goby samples were obtained from 2 fishermen who were fishing in Lapompakka Lake. Sample analysis was conducted at the Laboratory of Fisheries Biology, Department of Fisheries, Faculty of Marine and Fisheries Sciences, Hasanuddin University. The number of fish obtained was 212 individuals, consisting of 153 males and 59 females. Based on the results of the analysis, the growth patterns of male and female tank goby with a value of b = 2.4667 and the female with a value of b = 2.3770 have a negative allometric growth pattern, which indicates the increase in body length is faster than the increase in body weight of the fish. The value of the condition factor indicates that the tank goby is in good condition and are in the fat/plump category dan the condition factor of the tank goby increase along with an increase in the level of gonad maturity. Keywords: Tank goby Glossogobius giuris, growth pattern, length-weight relationship, condition factor, Lapompakka Lake Share Link | Plain Format | Corresponding Author (Sri Wahyuni Rahim)

35	Aquatic Ecology and Conservation (International)	ABS-10
Fish Community Structure During the Dry Season in the Cipeles River, Sumedang Regency, West Java Province, Indonesia Rostika (a*), Titin Herawati (b), Ayi Yustiati (b), Ibnu Bangkit Bioshina Suryadi (b) Fisheries Department, Faculty of Fisheries and Marine Science, Padjadjaran University, Jl. Raya Bandung-Sumedang, Hegarmanah Jatinangor, Sumedang 45363, West Java, Indonesia Abstract Cipeles River is sub-watershed of the Cimanuk River that flows in Sumedang Regency. The upstream in Sukasari District and empties into Tomo District, Sumedang Regency. This research aims to map the structure of the fish community in the Cipeles River during the dry season. The research was conducted from September 2020 to December 2020 using the field observation methods and purposive sampling techniques at three stations, data analysis employed comparative-descriptive. Parameters observed were abundance, diversity, dominance, uniformity, community structure and water quality. The results showed that 566 fish caught consisting of 8 species, 7 genera, 4 families. The fish community structure at stations 1, 2, and 3 was depressed, fish diversity at Cipeles river is low 0.86 < H^ < 0.89, with moderate dominance 0.55 < C < 0.62, low uniformy 0.16 < E < 0.17 suspected high influence of total suspended solids that have exceeded the waters threshold value for fisheries with concentrations between 67 mg/L-1 to 74 mg/L-1. Keywords: depressed- Community structure- Dominance- Total suspended solid Share Link | Plain Format | Corresponding Author (Rostika -)

36	Aquatic Ecology and Conservation (International)	ABS-13
Capture-based aquaculture of glass eel nurseries, Anguilla bicolor in Cilacap, Central Java, Indonesia Purnama Sukardi*1, Christina Tri Setyorini2, Dewi Susilowati, Warsidi2, Karina Odia Julialevi2, Laeli Budiarti2 and Miftahul Jannah2 1.Faculty of Fishery and Marine Sciences- 2. Faculty of Economics and Business, Jenderal Soedirman University. *Corresponding author: purnamaskd[at]gmail.com Abstract Capture-based aquaculture specially consider the fattening or on-growing of species which is based on the wild-caught seed. The survey was conducted to evaluate the sustainability of eel nurseries based on the catch of glass eels carried out by aquafarmers in Cilacap from Januari 2021 until March 2022. Ten districts were taken for this study, i.e. Kroya, Adipala, Maos, Kesugihan, Cilacap Utara, Jeruk legi, kawunganten, Bantarsari, Kedungreja and Sidareja. There were three species that inhabit the Segara Anakan area, including Anguilla bicolor, Anguilla nebulosa and Anguilla marmorata. There were two spawning periods in Segara Anakan which the first spawning was during September, October and November, and the second one was in March, April and May. Until now, several fishing gears used by fishermen in Segara Anakan to catch glass eels, namely anco (life net), jarring apong (fyke net), sero (trap guiding barrier), waring surung (push net). The technology of glass eel nursery was reliable, in the seedling areas, Segara Anakan, where most eels were produced. However, the industry was still wholly dependent on wild catches, glass eels, which were caught by fishermen during their migration from the sea to freshwater rivers and streams. There were two glass eel nurseries areas in Cilacap, namely around the Serayu and Citanduy rivers. In the east there are areas of Kroya, Maos and Kesugihan, while in the west in Kawunganten, Kaliwungu-Kalicengis Kedungreja and Gandrungmangu. The capture of glass eels, along with other environmental pollution and anthropogenic impacts, had all contributed to the significant decline in eel numbers over the past fiveteen (15) years, include sedimentation, illegal logging of mangrove and mangrove conversion, as well. Keywords: glass eel nursery, Anguilla bicolor, capture-based aquaculture, spawning seasons Share Link | Plain Format | Corresponding Author (Purnama Sukardi)

37	Aquatic Ecology and Conservation (International)	ABS-280
Survival Rate of Corals in Bleaching Event 2016 in West Lombok, West Nusa Tenggara, Indonesia Ofri Johan*1, Aida Herawati2 and Taslim Arifin2 1Research Institute for Ornamental Fish Culture, Jl. Perikanan No. 13, Pancoran Mas, Depok, Indonesia 2Research Center for Marine, Jl. Pasir Putih Kav. 1 Ancol Timur, Jakarta, Indonesia, 14430 *Corresponding author: ofrijohan[at]yahoo.com Abstract Abstract. Western area of Lombok Island is a tourism area that has rich underwater biodiversity in coral reefs ecosystem because of flow path of Indonesia Trough Flow which carries nutrients continuously through the Lombok Strait. Damage that occurs around the Western area of Lombok Island caused of climate change and community waste disposal activities that causing coral bleaching. Based on the research result conducted on 23 - 28 May 2016 at 6 point located between 08o43^13,6^ S 116o01^15,1^ E to 08o43^50,6^ S 115o57^47,9^ E using squares transect method and processed by CPCe program shows 24,615% of coral reefs in the western side of Lombok Island has been bleaching, and then based on research conducted on the same locations in 20-23 July 2016 shows some corals still bleaching on Acropora, Pocillopora, Porites with percentage was already decreased, about 4% only found on Acropora, Pocillopora, Porites dan Favites. This Study shows that each species survive and be able to be broodstock for the next life of corals in this areas. Keywords: Coral bleaching, West Lombok, Quadrat Transect. Share Link | Plain Format | Corresponding Author (Ofri Johan)

38	Aquatic Ecology and Conservation (International)	ABS-58
Population status and microhabitat preferences of endemic Banggai cardinalfish (Pterapogon kauderni) in the introduced habitat in Kendari Bay, Indonesia Ucu Yanu Arbi (a*)- Indra Bayu Vimono (a)- Nindya Rizqy Kusumawardhani (b)- Laode Anshari (c) a) Research Center for Oceanography, National Research and Innovation Agency, Jl. Pasir Putih Raya No. 1, Ancol Timur, Jakarta Utara 14430, Indonesia * uyanua[at]gmail.com b) Department of Biology, Faculty of Sciences, Sepuluh November Institute of Technology, Campus FASAD-ITS Sukolilo, Surabaya 60111, Indonesia c) Department of Marine Science, Faculty of Fisheries and Marine Sciences, Halu Oleo University, Campus FPIK-UHO Anduonohu, Kendari 93232, Indonesia Abstract Endemic Banggai cardinalfish has been found in several regions of Indonesia as an introduced species, including Kendari, Southeast Sulawesi. Observation on Banggai cardinalfish in Kendari Bay waters was carried out from late March to early April 2019 to obtain data on population and microhabitat preferences of Banggai cardinalfish in this location. The data were collected by scuba diving using a modified Belt Transect method, with 3 replicate transects (20x5 m) at each station. Observations of Banggai cardinalfish abundance, habitat and microhabitat preferences were carried out in each belt transect. The fish was classified into 3 sizes based on standard length (SL): post-larval stage, juvenile, and adult. As supporting data of environmental, several parameters of physic and chemical were also measured at each location. The result shows that Banggai cardinalfish populations were found in all five locations at varying densities. 589 individuals of fish observed during the survey at five stations, consisting of 1.53% pot-larvae stages (9 individuals), 38.88% juveniles (229 individuals) and 59.59% adults (351 individuals). The density was ranged 0.31-2.41 ind m-2, which the lowest was in Station I (North part of Bokori Island), and the highest was in Station II (West part of Bokori Island). The maximum density for post-larvae stages was found at Station V (0.09 ind m-2), for juveniles at Station II (1.42 ind m-2) and for adults at Station IV (1.04 ind m-2). The majority (71.82%) of the Banggai cardinalfish were associated with sea urchins (Diadema spp.), others associated with seagrass (11.71%), coral branching (9.51%), sea anemone (5.43%) and mushroom coral Heliofungia actiniformis (1.53%). Juveniles and adults were generally found to be associated with sea urchin, while all post-larvae stages were associated with Heliofungia actiniformis. The results show that the Banggai cardinalfish has been able to adapt and establish resident populations in Kendari Bay water. Keywords: Pterapogon kauderni- Apogonidae- introduced species- microhabitat preference- Sulawesi Share Link | Plain Format | Corresponding Author (Ucu Yanu Arbi)

39	Aquatic Ecology and Conservation (International)	ABS-61
Status of Barbodes binotatus (Valenciennes, 1842) in Ecological Trophy in the Ciliwung River Region, West Java Gendhys Lintang (a), Fahma Wijayanti (a*), Gema Wahyudewantoro (b) (a) Department of Biology, Faculty Science and Technology, Universitas Islam Negeri Syarif Hidayatullah Jakarta, Ciputat, Tangerang Selatan *fahmawijayanti[at]uinjkt.ac.id (b) Fish Biosystematics Laboratory, Biological Research Center-National Agency for Research and Innovation (BRIN), Cibinong, Jawa Barat Abstract Barbodes binotatus is native fish from Ciliwung River whose existence is decrease, due to similarity of food source between native species and introduced species cause competition seek food. The study aimed to determine the trophic level and position B. binotatus in the Cilliwung River ecosystem based on gut content analysis using the purposive sampling method during August-October 2021. Data were obtained from total of 60 sample from the Ciesek River, Cirangrang and Sukabirus. The fishes were dissected, and gut contents were observed using a light microscope, with observations repeated 3 times of each sample. Data analysis includes relative length of gut, index of preponderance, nichce area, niche overlap, and trophic level of an organism. The feed source consists of Bacillarophyta (68,62%), Chlorophyta (16,40%), Manogononta (8.41%), Cyanophyta yaitu (2,81%), Euglenaphyta (1,70%), Amoebozoa (1,01%), Copepods (0,93%), and detritus (0.11%). The result showed that B. binotatus in Ciliwung River is at trophic level II and included as omnivore (2,1 < Troph < 2,9). B. binotatus as omnivore and have common food source with introduced species cause competition seek food. Keywords: Barbodes binotatus, Ciliwung, preponderance index, trophic level Share Link | Plain Format | Corresponding Author (Gendhys Lintang Ayu)

40	Aquatic Ecology and Conservation (International)	ABS-76
The Possibility of Replacing Corn Meal with Coconut Waste on the Growth Performance of African catfish (Clarias gariepinus) Muhammad Fikri Abdul Hadi (a), Roshani Othman (a), Dzulkarnain Ahmad (a), Intan Faraha A Ghani (a) (a) Faculty of Engineering and Life Sciences, University Selangor, Jalan Timur Tambahan, 45600 Batang Berjuntai, Selangor Abstract The development of aquaculture industry in Malaysia often faces high feed cost approximately 70-80% of total production cost. One of the reason is the usage of corn meal which is expensive and the development of using plant waste as alternative, has received interest in the aquaculture industry. Hence, this study investigated the replacement of corn meal with different percentages of coconut waste to assess the growth performance of the African catfish, Clarias gariepinus. The study design used 5 treatments and 3 replications. Treatments included control (0% coconut waste in the feed), P1 (10% coconut waste in feed), P2 (20% coconut waste in feed), P3 (30% coconut waste in feed) and P4 (40% coconut waste in feed). To determine the suitability of using coconut waste in this feed, the growth performance was determined based on feed consumption, absolute body weight, feed conversion and survival rate of the fish. Proximate analysis of the formulated feeds was also conducted. Result shows that formulated feed using 30% of coconut waste could possibly replace the corn meal and increase the growth of juvenile African catfish. Keywords: Aquaculture, Formulated Feed, Fish Feed, Sustainable, Clarias gariepinus Share Link | Plain Format | Corresponding Author (Muhammad Fikri Abdul Hadi)

41	Aquatic Ecology and Conservation (International)	ABS-79
The effect of coral transplantation on the community structure of reef fish on Harapan Island, Seribu Archipelago National Park, Jakarta, Indonesia RA Nurafif (a), F Yulianda (a), Sulistiono*(a), CPH Simanjuntak (a), A Ervinia (a), B Subhan (b), T Nugroho (c) a) Department of Aquatic Resources Management, Faculty of Fisheries and Marine Sciences, IPB University (Bogor Agricultural University), Darmaga, Bogor 16680, Indonesia. * onosulistiono[at]gmail.com b) Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University, Bogor. 16680. c) Department of Fisheries Resources Utilization, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University, Bogor. 16680. Abstract The damage of coral reef ecosystems in Indonesia is increasingly alarming. For this reason, efforts are needed to rehabilitate the coral reef ecosystems. This study aims to evaluate the effect of coral transplantation on the structure of coral fish communities in the waters of Harapan Island, precisely on Rosa Island and Pamegaran Island, Seribu Archipelago National Park. Study of the reef fish community structure was carried out for 8 weeks from February 2018 to April 2019. The observations were conducted by scuba diving to dive directly into the location of the coral transplant. During the study period, a total of 35 species (14 families) were observed. There was an increase in fish abundance per 50 m2 which was significant over time for 8 weeks of observation (alpha 0.05). Significant differences in abundance of reef fish also occurred between the two islands (alpha 0.05), indicating that differences in the depth of the location of coral transplants can also affect the abundance of reef fish. It can be stated that the coral transplantation efforts succeeded in increasing the abundance of individual of reef fish on both coral transplantation islands. Keywords: Coral reef fish community, transplatation Share Link | Plain Format | Corresponding Author (sulistiono sulistiono sulistiono)

42	Aquatic Ecology and Conservation (International)	ABS-82
Phyto-zooplankton community structure in the sea waters around Panjang and Pamujan Besar Islands of Banten Bay, Indonesia E Juniardi(a), Sulistiono(a*), S Hariyadi(a), A Ervinia(a), DM Wildan(a), N Rochim(a), A Asriansyah(a), T Hestiranoto(b), T Nugroho (c),H Thoha(d), N Fitriyah(d) a) Department of Aquatic Resources Management, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University, Darmaga, Bogor, 16680, Indonesia. * onosulistiono[at]gmail.com b) Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University, Darmaga, Bogor, 16680, Indonesia. c) Department of Fisheries Resources Utilization, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University, Darmaga, Bogor, 16680, Indonesia d) Research Center for Oceanography, The National Research and Innovation Agency (BRIN), Jl. Pasir Putih No. 1, Ancol Timur, Jakarta, 14430, Indonesia. Abstract This study aims to analyze the phyto-zooplankton community and aquatic environmental conditions of the Panjang and Pamujan Besar Islands in Banten Bay. The study was conducted for 3 months from May-July 2019 in six locations around the islands. The abundance, diversity, evenness, and dominance indices were analyzed.. Results showed that, the phytoplankton found consisted of 3 classes, i.e. Bacillariophyceae (30 genera), Cyanophyceae (2 genera), and Dinophyceae (5 genera), with the most abundant genera were Chaetoceros sp, Spirulina sp and Rhizosolenia sp. The zooplankton consisted of 8 classes, i.e. Bivalva, Ciliata (6 genera), Malacostraca (13 genera), Gastropods, Polychaeta, Sarcodina (1 genus), Rotifera (1 genus), and Urochordata (1 genus), with the most abundant biota were Nauplius, Calanus, and bivalve larvae. The abundance of phytoplankton and zooplankton varied from 38095 to 13038515 cell/m3 (phyto) and 4010-190475 ind./m3 (zoo). The diversity, evenness and dominance indices of the phyto and zooplankton were 0.693-2.146, 0.694-1,00, 0.160-0.341, and 0.780-2.027, 0.275-0.861, 0.160-0.500, respectively. Findings of the study illustrated the plankton community had moderate diversity and no dominant genera was found. Keywords: Banten Bay, fishing ground, plankton Share Link | Plain Format | Corresponding Author (sulistiono sulistiono sulistiono)

43	Aquatic Ecology and Conservation (International)	ABS-83
Macrozoobenthos community structure in the sea waters of Panjang and Pamujan Besar Islands, Banten Bay, Indonesia E Juniardi(a), Sulistiono(a*), S Hariyadi(a), DM Wildan(a), A Ervinia(a), A Asriansyah(a), T Hestiranoto(b),A Ibrahim(c) a) Department of Aquatic Resources Management, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University, Jl. Agatis Darmaga, Bogor, 16680, Indonesia. *onosulistiono[at]gmail.com b) Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University, Jl. Agatis Darmaga, Bogor, 16680, Indonesia. c) Center for Limnology and Water Resources Research, National Berau of Research and Inovation (BRIN), Komplex CSC-BG, Jalan Raya Bogor Km. 46 Cibinong, 16911, Indonesia. Abstract The sea waters around Panjang and Pamujan Besar Islands (Banten Bay) are fishing grounds and recreation areas for local peoples around the bay. The purpose of this research is to find out macrozoobenthos community structure in sea waters of Panjang and Pamujan Besar Islands, Banten Bay. The research activity on the macrozoobenthos community structure was carried out in May - July 2019 at 6 station points scattered around those islands. Data analysis was carried out on density, diversity, evenness, and dominance indices. Based on the research results, there were 17 genera of macrozoobenthos from four classes, namely Bivalvia (1 genus), Gastropoda (7 genera), Malacostraca (7 genera), and Polychaeta (7 genera). Procopio sp., Nephthys sp., and Nereis sp. were the most common genera of the macrozoobenthos found at each station. Based on the calculation results, it was found that the density varied between 58 to 406 ind/m2. The value of the diversity, evenness, and dominance indices at each station varied from 1.00 to 2.842, 0.935 to 1.00, and 0.157 to 1.00, respectively. Based on these values, the condition of the aquatic ecosystem of Panjang and Pamujan Besar Islands has medium diversity, high evenness, and no dominant biota. Keywords: macrozoobenthos, marine ecology, environment, Share Link | Plain Format | Corresponding Author (sulistiono sulistiono sulistiono)

44	Aquatic Ecology and Conservation (International)	ABS-86
Food Habits of Fish Species in the Cipeles River, Sumedang Regency, West Java Province, Indonesia Titin Herawati (a*), Rostika (a), Ayi Yustiati (a), Ibnu Bangkit Bioshina Suryadi (a) Fisheries Department, Faculty of Fisheries and Marine Science, Universitas Padjadjaran, Jl. Raya Bandung-Sumedang, Hegarmanah Jatinangor, Sumedang 45363, West Java, Indonesia Abstract Cipeles River is a tributary of the Cimanuk River that flows in Sumedang Regency and has available fish and food resources. This study aims to determine the food habits which include the prependerant index and trophic level of fish species in the Cipeles River. The method used is a survey by setting 3 observation stations and 4 repetitions which were carried out from September 2020 to October 2020. The results showed that of the 7 fish species caught based on observations of natural feed on gastric contents, the preponderant index value ranged from 0.6 to 77. 27% of the main food is phytoplankton with the trophic level ranges from 2.13 to 2.36, meaning that fish are herbivores. Keywords: Food habits- Fish- Cipeles River- Herbivore Share Link | Plain Format | Corresponding Author (Rostika -)

45	Aquatic Ecology and Conservation (International)	ABS-88
Analysis of Water Pollution Level in Domas Coastal Waters Based on Physical and Chemical Parameters Ashifa Rahmania, Aliati Iswantari, Sulistiono* Department of Aquatic Resources Management, Faculty of Fisheries and Marine Sciences, IPB University (Bogor Agricultural University), Jl. Agatis, Dramaga, Bogor 16680, Indonesia. *onosulistiono[at]gmail.com Abstract The coastal area of Banten Bay has a high residential and industrial growth. Industrial development in the bay area without proper waste management facilities can harm the aquatic environment. This study aims to determine water pollution levels based on physical and chemical parameters in Domas Coastal Waters, Banten Bay. Sampling was carried out from August 2021 to January 2022 at six stations. The results were compared with the water quality standards based on Government Regulation No. 22 of 2021. The values of each parameter during the study were temperature (25.1-33.9 degree C), turbidity (1.1-91 NTU), TSS (4.5-243 mg/L), pH (7.00-8.06), DO (5.0-8.2 mg /L), salinity (29-35 ppt), nitrite (0.001-0.222 mg/L), nitrate (0.001 mg/L), ammonia (0.001-1.739 mg/L), and total phosphate (0.001-0.136 mg/L). Based on the calculation of the pollution index, Domas Coastal Waters were classified into the light to moderately polluted category (1.2978-5.3319). Keywords: Domas- environment- water quality parameters Share Link | Plain Format | Corresponding Author (Ashifa Rahmania)

46	Aquatic Ecology and Conservation (International)	ABS-96
Length-weight Relationship and Condition Factor of Seven Fish Species from Apogonidae Family in Lembeh Strait, North Sulawesi Fione Yukita Yalindua(a*), Ana Faricha (a), Rikardo Huwae (a) a) Research Center of Oceanography, Badan Riset dan Inovasi Nasional (BRIN), Jl. Pasir Putih Raya No.1, Jakarta Utara, Indonesia *yukitayalindua[at]gmail.com Abstract The weight length relationship (LWRs) and condition factors can be an indicator of fish growth and environmental suitability. This study aims to calculate the length-weight relationships and condition factor of six Apogonidae species and compare them with Pterapogon kauderni as an introduced species in the same area and condition. The sample is collected monthly from January to December 2020 using a trap net in the Lembeh Strait area of North Sulawesi. A total of 699 specimens from sampling obtained seven species from Apogonidae family with the most specimen belonging to Pterapogon kauderni (33%) and the lowest is Pristicon trimaculatus (4.4%). The results indicated that almost all species exhibited a negative allometric growth pattern with the b value ranges 2.49-2.98 except for Apogon hartzfeldii resulted in positive allometric growth pattern (3.24). The relative condition factor ranges are 0.89-1.32 from all the seven species with only Apogon melas, Pterapogon kauderni and Apogon sealei values are below one and significantly different with the other group (p<0.05). This result can be caused by a variety of factors and need to be investigated further. This data is useful in establishing a management and monitoring system for Pterapogon kauderni in its introduced area. Keywords: Length-weight relationship- condition factor- Apogonidae- Pterapogon kauderni- Lembeh strait Share Link | Plain Format | Corresponding Author (Fione Yukita Yalindua)

47	Aquatic Ecology and Conservation (International)	ABS-112
The unrevealed of water quality parameters at Lake Oemasapoka, Rote island - investigation the concentration of heavy metal in a saline environment Luki Subehi, Th Rina Mulyaningsih, Media Fitri Isma Nugraha, Atriyon Julzarika, Kayat, Imroatushshoolikhah, Yustiawati, Hanhan A. Sofiyuddin, Saeful Yusuf, Enos Tangke Arung Research Center for Limnology and Water Resources - BRIN Abstract Inland water resources on Rote Island are more than 80 lakes and ponds. The inland water resource on Rote Island is a saltwater environment. One of them is Dead Sea Lake Oemasapoka. The results of previous research, Oemasapoka Dead Sea Lake showed its uniqueness in the form of high salinity values (above the average salinity of seawater, 40-42 ppt), also found fish fauna that usually live in freshwater, namely Tilapia (Oreochromis niloticus) and Fish Betok (Anabas testudineus and fish commonly found in sea or brackish water, namely glodok fish (Periophthalmus sp.). As a closed lake (no inlet and outlet), the maximum depth of the lake is 28.7 m with a lake area of 1,246.25 Ha. This study aims to reveal several water quality parameters, especially heavy metal concentrations in a saline environment. Moreover, it found that there was some fresh water (springs), salt water and water smells H2S. In order to get insight of the heavy metal parameters condition, Heavy metals in each water sample were examined using neutron activation analysis. Sample irradiation was carried out at the G.A Siwabessy Multipurpose Reactor Reactor system in Serpong, at neutral flux ron 3 x 1013 n cm-2s-1. Quantitative analysis was performed using the INAA comparison method and INAA-ko-IAEA software. The results showed the concentrations of Aluminum (Al), Chromium (Cr) and Zinc (Zn) for H2S smelling water (1.45 0.24 mg/L, 0.32 0.02 mg/L and 0.28 0 .02 mg/L) was higher. compared to fresh water as spring water (0.99 0.15 mg/L, 0.16 0.01 mg/L and 0.17 0.01 mg/L, receptively). In addition, only the concentration of Chromium (Cr) for brine was obtained (0.24 0.01 mg/L). The results show that the geological processes in this area are unique, especially related and the interactions between fresh water (springs), salt water and H2S odors should be explained in more detail with the natural conditions in Dead Sea Lake Oemasapoka. Keywords: Dead Sea Lake Oemasapoka, Heavy metal, Aluminum, Chromium, Zinc, Rote Island Share Link | Plain Format | Corresponding Author (Luki Subehi)

48	Aquatic Ecology and Conservation (International)	ABS-116
Mangroves in Southeast Aru Marine Protected Area Nur Mujid Abdullah (a*), Imam Fauzi (a), Janson Pieterz (b) a) National Marine Protected Area Authority of Kupang Jalan Yos Sudarso Terusan Bolok, Kupang, Indonesia *nur.abdullah[at]kkp.go.id b) Faculty of Marine Science and Fisheries, Pattimura University Jalan Mr, Chr. Soplanit, Ambon, Maluku Abstract Southeast Aru Marine Protected Area (MPA) is a 114,000 hectares reserve-type national conservation area in Arafura Sea, Maluku where the Ministry od Marine Affairs and Fisheries managed since 2009. Its mangrove is the largest coastal ecosystem which is important for sustainable fisheries and coastal disaster mitigation. The main objective of this study is to understand the condition of mangrove community, its impact on fisheries and threats to its continuity. Stratified random sampling on three plots of 10 m x 10 m and hemispherical photography are employed on 13 observation stations across four zones. Local fishermen are interviewed about their activities related to mangroves. From 13 observation stations, 19 species from 8 families and 10 genera are identified. The average of mangrove density and its canopy coverage are respectively 2997 stand/ha and 74.66%. These values can be interpreted as in good condition and moderate coverage (KepmenLH 201/2004). Rhizophora mucronate and Sonneratia alba are the two most dominant species in all observation stations. Local fishermen^s activities in the mangrove area are catching crabs, trap-fishing, and cutting mangrove woods for firewood and/or simple non-permanent housing. Bruguiera gymnorrhiza, Phemphis acidula, Rhizophora mucronate, and Ceriops tagal are their favorites. Keywords: Mangrove, Southeast Aru MPA, threats Share Link | Plain Format | Corresponding Author (Nur Mujid Abdullah)

49	Aquatic Ecology and Conservation (International)	ABS-124
Seagrass Morphological Characters in Islands with Different Distance from the Mainland Khairul Amri 1), Supriadi Mashoreng 1), Dody Priosambodo 2) and Nurjannah Nurdin 1) 1) Department of Marine Science, Faculty of Marine Science and Fisheries, Universitas Hasanuddin 2). Department of Biology, Faculty of Mathematic and Natural Sciences, Universitas Hasanuddin Abstract Seagrass is an ecosystem that has various important physical and ecological functions in coastal areas. However, its existence is heavily influenced by natural and anthropogenic factors. Research to see the effect of the location of the island from the mainland on the morphological characters of seagrass has been carried out on four islands in the Spermonde archipelago, namely Lae-Lae and Satando (near the mainland of Sulawesi Island) and Barranglompo and Samatellu Borong (further from the mainland of Sulawesi Island). Seagrass samples were collected using a line transect method. Several morphological characters measured were leaf length, leaf width, rhizome diameter, internode lenth and number of roots. The results showed that more seagrass species were found on islands far from the mainland. The morphometric characteristics of the seagrass Enhalus acoroides on islands near the mainland have wider leaves, and larger rhizome diameters, but have lower leaf length, rhizome length, internode length and number of roots compared to the seagrass Enhalus acoroides on islands farther away. More intense epiphytic attachments on seagrass blades on seagrass beds closer to the mainland indicating high nutrient runoff through river and drainage in the mainland. Keywords: Seagrass, morphology, Enhalus aoroides Share Link | Plain Format | Corresponding Author (khairul amri)

50	Aquatic Ecology and Conservation (International)	ABS-130
Potency and development strategy of mangrove ecotourism in Karangantu Coastal Area of Banten Bay A Putri (a), F Yulianda (a), Sulistiono (a)*, CPH Simanjuntak (a), A Ervinia (a), B Subhan (b), T Nugroho (c) a) Department of Aquatic Resources Management, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University, Bogor, 16680 * onosulistiono[at]gmail.com b)Department of Marine Science and Technology, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University, Bogor, 16680 c)Department of Fisheries Resources Utilization, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University, Bogor, 16680 Abstract Karangantu coastal waters is one of the coastal areas that has the potential to develop ecotourism based on mangrove ecosystems. This study aims to analyze the potential of the mangrove ecosystem for ecotourism development. This study was conducted in October 2020 and February to March 2021 in the Karangantu mangrove tourism area of Banten Bay. Data was collected through field observations and interviews filling out questionnaires. The analysis was carried out on the tourism suitability index (TSI), carrying capacity, and management strategy using the Strength Weakness Opportunity Threat (SWOT). The results shows that the mangrove ecosystem of Karangantu was suitable to be used as an ecotourism area. Ecotourism development included mangrove tracking and boating, with a carrying capacity and trips of 192 people per day (and 4 trips), and187 people per day (and 4 trips), respectively. The development strategy prioritizes three alternative strategies including the rehabilitation of mangrove ecosystems, improving the quality of human resources, and improving facilities and infrastructure. Keywords: Carrying capacity, ecotourism, mangroves, strategy Share Link | Plain Format | Corresponding Author (sulistiono sulistiono sulistiono)

51	Aquatic Ecology and Conservation (International)	ABS-143
The Distribution Characteristic of Butterflyfishes in Western Indonesia Ana Faricha(1*), Fione Y. Yalindua(1), and Diah Permata Wijayanti (2) 1) Research Center for Oceanography, National Research and Innovation Agency 2) Faculty of Fisheries and Marine Science, Diponegoro University *) anafaricha88[at]gmail.com Abstract The butterflyfishes (family Chaetodontidae) associated with coral reefs as a bio-indicator for health conditions, and they have several foraging categories. The coral condition drives in fish abundance and species composition, however, the other factors may play the rule of the habitat preferences. Some studies present that the spatial distribution has in relation with habitat characteristics. Here, we investigate butterflyfishes that might build the distribution characteristics in West Indonesia. About 78 sites distributed in the Western Indonesia which are grouped into East of Sumatera (A): Batam (19 sites), Belitung (11 sites), Bintan (14 sites), and Lingga (11 sites), and West of Sumatera (B): North Nias (10 sites), and Central Tapanuli (13 sites), used as the study areas for 2015, 2016, and 2018 under Reef Health Monitoring Program by Research Center for Oceanography. The Density and species richness data were collect using the Underwater Visual Census (UVC) and analyzing using ggplot in R software with a Kruskal-Wallis and Robust test. The result shown that group A has a lowest number of species (2-6 species) compared to group B (9-20 species). Bintan and Lingga have density increase during 2016, however Batam and Central Tapanuli facing in 2018. Among the group A and B has not specifically difference on trend of density during study times. This condition might influence by size frequency of fishes have founded and species recruitments. Butterflyfishes in each group has characteristic distribution due to consistently presence. There are 4 species that dominated and presence in three times, Chaetodon octofasciatus and Chelmon rostratus in group A, moreover, Heniochus pleurotaenia and Chaetodon trifasciatus dominated in group B. The differences domination might influence by the habitat characteristict, food resource and feeding behavior of specific species. Moreover, the geographical variation between the group might drive the feeding substrat preference of the Keywords: Chaetodontidae, species distribution, foraging task Share Link | Plain Format | Corresponding Author (Ana Faricha)

52	Aquatic Ecology and Conservation (International)	ABS-156
Harmful algal bloom in three selected coastal areas of Indonesia T Sidabutar (1), E S Srimariana (2) H Cappenberg (1), and S Wouthuyzen (1) (1)Research Centre for Oceanography, BRIN Jl. Pasir Putih I, Jakarta 14430, Indonesia (2)Faculty of Fisheries, IPB University Campus Darmaga, Bogor 16680, Indonesia Abstract The frequency and distribution of algal bloom have been increasing in some coastal waters in Indonesia, until nowadays. The occurrence of harmful algal blooms (HABs), is now a major problem for several locations which causes thread and economic losses to the fishing industry, damage to aquatic ecosystems, and mass mortality of fish and other living organisms in the waters. The negative impact also on marine tourism, and damages the aquatic environment and also consumer health. There are three locations known as the most frequently algal bloom occurrences namely, Jakarta Bay, Lampung Bay, and Ambon Bay. The study of HABs has been conducted in the most infected locations in this country. All samples were collected using 20 um net plankton and preserved with Lugol^s solution before being identified. Some of the causative species were identified as toxic species mainly belonging to dinoflagellates, such as Pyrodinium sp, Aleandrium sp, Gymnodinium sp, and Cochlodinium sp. The most frequent species of algal bloom in those coastal waters are primarily, Skeletonema, Chaetoceros, Trichodesmium, and Noctiluca. The high nutrients mainly, nitrate and phosphate concentration in the waters is the primary triggering factor resulting from anthropogenic activities on the land that make the coastal waters eutrophic. This paper discussed the recent distribution, causes, and impact of harmful algal blooms events in those three coastal waters. Keywords: harmful algal bloom, distribution, impact, causative species, triggering factor Share Link | Plain Format | Corresponding Author (Tumpak Sidabutar)

53	Aquatic Ecology and Conservation (International)	ABS-164
Status Keberlanjutan Upaya Konservasi Flora dan Fauna Pada Kawasan Areal Konservasi Hutan Mangrove di Job Pertamina-Medco E&P Tomori Sulawesi Tengah Mohammad Syakir, Reinaldi, Yudi Haryono, Andrina R Riyanto, Laode Mahmud, Khairuuridha, Ricko A Putra JOB Pertamina Medco E&P Tomori Sulawesu Fakultas Kehutanan Universitas Tadulako Abstract ABSTRAK Penelitian ini telah dilakukan pada bulan Agustus - November 2021 pada areal revegetasi hutan mangrove. Metode penelitian dalam pengamatan mangrove, menggunakan petak contoh Transect Line Plot ukuran 10 x 10 dan melakukan tabulasi data perjumpaan langsung jenis-jenis fauna pada ekosistem mangrove. Data tersebut akan dianalisis menggunakan indeks keanekaragaman jenis, indeks kekayaan jenis, dan juga indeks kemerataan jenis. Sedangkan analisis keberlanjutan digunakan dalam menentukan status keberlanjutan konservasi yaitu dengan menggunakan analisis Rapfish (Rapid Appraisal for Fisheries) yang telah di modifikasi sehingga menjadi Rapid Appraisal Tomori (RAT) dengan menggunakan metode penilaian cepat multi disiplin (multidisciplinary rapid appraisal) yaitu Multidimensional Scaling (MDS). Hasil penelitian menunjukkan analisis keberlanjutan analisis MDS dengan menggunakan RAT menunjukan nilai indeks keberlanjutan dimensi ekologi sebesar 67,20% (cukup berkelanjutan) Indikator kunci yang diperkirakan paling berpengaruh terhadap keberlanjutan dimensi ekologi berdasarkan hasil analisis leverage yaitu penetapan tapak konservasi dengan nilai sebesar 6,64. Keywords: Tomori, Mangrove, Konsevasi Share Link | Plain Format | Corresponding Author (Mohammad Syakir)

54	Aquatic Ecology and Conservation (International)	ABS-172
Detection of White Spot Syndrome Virus (WSSV) and Infectious Hypodermal and Haematopoietic Necrosis Virus (IHHNV) in Green mussel (Perna viridis) Linnaeus 1758 1Sriwulan sriwulan, 1Amriana amriana, 1Arini Tri Jayanti, 1Hilal Anshary 1Laboratory of Fish Parasites and Diseases, Aquaculture Study Program, Department of Fisheries, Faculty of Marine Science and Fisheries, Hasanuddin University, Makassar, Indonesia. Corresponding author: Sriwulan sriwulan, sriwulancinga07[at]gmail.com Abstract White Spot Syndrome Virus (WSSV) and IHHNV (Infectious Hypodermal and Haematopoietic Necrosis Virus) are pathogens damaging shrimp aquaculture. Viral diseases can generate economic losses in shrimp farming activities. The aim of this study is to detect the occurrence of White Spot Syndrome Virus (WSSV) and Infectious Hypodermal and Haematopoietic Necrosis Virus (IHHNV) in green mussel (Perna viridis) Linnaeus 1758. This research was conducted in March-September 2016. A total of 20 samples of green mussels were taken from Takalar and Pangkep regency. The organs observed were gills, gonads, muscles, and hepatopancreas. The stages of this study included sample preparation, DNA extraction, DNA amplification, and electrophoresis. Each sample was analysed by PCR technique using WSSV 436 F / R specific primers and IHHNV 309 F / R. The results of this study show that WSSV is positively detected on Pangkep and Takalar Regency, while IHHNV only detected in the Pangkep Regency. The prevalence of WSSV is 15% both in Takalar and Pangkep regency while IHHNV prevalence is 15% in Pangkep Regency. WSSV was determined on gill and hepatopancreas in Takalar Regency but only on gill in Pangkep while IHHNV was found in the gills in Pangkep waters. The existence of these diseases has indicated that green mussel can be accumulated the WSSV and IHHNV to transmit into the water environment. Keywords: WSSV, IHHNV, Green mussel, Perna viridis, Gills, Hepatopancreas. Share Link | Plain Format | Corresponding Author (Amriana amriana)

55	Aquatic Ecology and Conservation (International)	ABS-195
A Comparative Study on Mangrove Community Structure at Karimunjawa, Indonesia: Kemujan Island and Jati Kerep Aquaculture Area Lita Mustika(a*), Sapto Purnomo Putro(b), Sri Utami(a), Riche Hariyati(a), Murningsih(a) a) International Undergraduate Programme of Biology Department, Faculty of Science and Mathematics, Diponegoro University. *Ltmstk.lm[at]gmail.com b) Center of Marine Ecology and Biomonitoring for Sustainable Aquaculture, Diponegoro University, Semarang, Indonesia Abstract Mangrove forest habitats of great variety can be found in the Karimunjawa Archipelago, which is located in Indonesia. The Karimunjawa Archipelago, located in Jepara Regency, is a group of 27 islands in the Java Sea. Mangrove is a type of vegetation that protects coastal habitat. The ecosystem^s long-term sustainability will be determined by its regeneration condition. This study aimed to examine mangrove community structure and mangrove regeneration at Karimunjawa. The study area was determined by purposive sampling technique with plot at size of 10 x 10m for tree, 5 x 5m for sapling, and 1 x 1m for seedling. This study revealed 11 mangrove species with the highest IVI value of 63.60% for R. stylosa at Kemujan Island, and L. racemosa with an IVI value of 109.71% at Jati Kerep Aquaculture Area. The diversity index (H^) was ranging between 1.55 to 2.00 and both study areas shared high similarity (SI = 70.59%). It was revealed that mangrove species grow at a slightly slower pace in Karimunjawa, as indicated by the number of individual number of seedlings (179 ind/ha) < sapling (234 ind/ha) < tree (239 ind/ha). Further test using one-way analysis of variance (ANOVA) revealed that there was a non-statistically significant difference in mean between Kemujan Island and Jati Kerep Aquaculture Area (F(1,4) = [3.136], p = 0.151). Keywords: Karimunjawa Archipelago- Importance Value Index (IVI), One-way Analysis of Variance (ANOVA). Share Link | Plain Format | Corresponding Author (Lita Mustika)

56	Aquatic Ecology and Conservation (International)	ABS-209
Catches Analysis of Scottish Seine Net Modification of cod-end in Majene Waters Mahfud Palo, Najamuddin, Andi Assir, Syahrul Sarlan, Indra Jaya Department of Fisheries, Faculty of Marine Sciences and Fisheries, Hasanuddin University, Makassar, South of Sulawesi, Indonesia. Bachelor student of Capture Fisheries Study Program, Department of Fisheries, Faculty of Marine Sciences and Fisheries, Hasanuddin University, Makassar, South of Sulawesi, Indonesia. Department of Marine Science and Technology, IPB University, Bogor, Indonesia Abstract Research on Scottish Seine Net Modification of cod-end was carried out to analyze the catch, in this case, the species composition and length composition. This research was carried out in the western coastal waters of Majene Regency, West Sulawesi, by following the fishing operation of one unit of Scottish Seine Net, which had modified its fishing gear. The Scottish Seine Net construction on one part of the pouch was changed from 1-inch mesh size to 1.25 inches as a case. The study results found ten types of fish caught with a total catch of 115.4 kg. The four most caught types were scad fish 46.5 kg, tuna 21.5 kg, skipjack 19.2 kg, rainbow runner 17.8 kg, and six other types of 10.4 kg. The total catch was 115.4 kg consisting of 1753 individuals with the composition of the type of catch consisting of scad (Decapterus russelli) 56.7%, Bigeye scad (Selar crumenophthalmus) 22.6%, skipjack (Katsuwonus pelamis) 9.9%, tuna (Euthynnus affinis) 3.1% and the other six species 7.7%. The length ranges for the four most common types of catch consisting of scad 7.3-25.8 cm, Bigeye scad 6.5-20.5 cm, skipjack tuna 10.8-25.5 cm, and tuna 14.5-45.1 cm. Flying fish as the catch with the highest composition caught 62.6% were suitable for catching. Keywords: Scottish Seine Net, Modification, Composition, Catch Share Link | Plain Format | Corresponding Author (Mahfud Palo)

57	Aquatic Ecology and Conservation (International)	ABS-211
PATTERNS OF RUGOSITY ON CORAL REEFS AROUND LAE-LAE, SAMALONA, BARRANG LOMPO AND KAPOPOSANG ISLANDS A. M. Agung Pratama Abdurrahman(1), Estradivari(2-3), Gunawan Syafruddin(1), Rohani Ambo-Rappe(4), Jamaluddin Jompa(4) (1)Master Student in Marine Science Study Program, Faculty of Marine Science and Fisheries, Hasanuddin University, Indonesia (2)Department of Ecology, Leibniz Centre for Tropical Marine Research (ZMT), Germany (3)Department of Marine Ecology, Faculty of Biology and Chemistry, University of Bremen, Germany (4)Marine Science Department, Faculty of Marine Science and Fisheries, Hasanuddin University, Indonesia Abstract Coral reef ecosystems are important for marine biodiversity. They play a key role in ocean energy flows, provide habitat for many marine organisms and support the livelihoods of coastal communities who often depend heavily on marine resources. Corals can have many growth forms, creating many nooks and crannies which provide specialised habitat niches which serve as places for marine organisms to shelter, live and breed. Reef rugosity is a simple measurement of the surface roughness- a high rugosity value will support fish communities. Coral reefs in good condition do not necessarily have high rugosity, and rugosity can vary within each coral reef zone, depending on the dominant form of coral reef structure in a given area. This research evaluated the differences in rugosity on reefs around several islands in the Spermonde Archipelago, Indonesia, based on their distance from the mainland (inshore-offshore zone) and the reef depth. Observation stations on the northwest coast were assumed to be further from the Sulawesi mainland and facing the open sea. Observation sites were Lae-Lae Island (inshore zone), Samalona and Barrang Lompo Islands (inner mid-shelf zone), and Kapoposang Island (outer zone). Coral reef rugosity data were collected using chains to measure the surface roughness. At each station rugosity was measured on the reef slope in several depth zones. Rugosity increased in line with the distance from the mainland at shallow depths, but not at deeper depths. Rugosity values will be influenced by the anthropogenic activities and natural dynamics which are the main factors causing rugosity to decline. Keywords: Coral reefs, marine biota, reef fish, rugosity Share Link | Plain Format | Corresponding Author (A. M. Agung Pratama Abdurrahman)

58	Aquatic Ecology and Conservation (International)	ABS-213
Comparative Study of Plankton Structure at Monoculture and Integrated Multi-Trophic Aquaculture (IMTA) Floating Net Cages at Coastal Area of Menjangan Besar, Karimunjawa Islands, Indonesia Siti Saodah Rifahyanti (1*), Sapto Purnomo Putro (2), Riche Hariyati (1), Murningsih (1) (1) Department of Biology, Faculty of Science and Mathematics, Diponegoro University, Semarang, Indonesia (2) Center of Marine Ecology and Biomonitoring for Sustainable Aquaculture (Ce- MEBSA), Diponegoro University, Semarang, Indonesia Abstract The study on the structure of the plankton community in Monoculture and Integrated Multi-Trophic Aquaculture System (IMTA) Floating Net Cages at Karimunjawa Islands was conducted in October 2021. This study aimed to assess the structure of the plankton community along with water quality parameters in those areas. Sampling was carried out by using the filtration method with a plankton net at three locations, namely monoculture, IMTA floating net cages, and reference area. The study discovered 40 species consisting of 22 species of phytoplankton and 18 species of zooplankton. The phytoplankton found were Bacillariophyceae, Cyanophyceae, and Dinophyceae classes, while the zooplankton found were Ascidiacea, Branchiopoda, Eurotatoria, Hexanauplia, Malacostraca, Secementea and Thecostraca classes. The abundance of phytoplankton ranged from 767 - 3067 cells/L, while abundance of zooplankton ranged from 600 - 3833 cells/L. The biological index of phytoplankton showed the diversity index (H) between 1.26 - 2.27, the evenness index (E) between 0.4 - 0.17, and the dominance index (D) between 0.46 - 0.72. The zooplankton biology index showed the value (H) between 1.44 - 2.28, the value (E) is between 0.67 - 0.99 and the value (D) is between 0.11 - 0.19. Water quality in the form of lightness between 5.1 - 7.38 m, water temperature between 24.53 - 25.8 oC, turbidity between 0 - 0.48 NTU, DO between 1 - 14.74 mg.L-1, pH between 5.75 - 9.55, salinity between 29.5 - 33 o/oo and TDS between 8.94 - 18.9 ppm. The results of the parametric data test using One-Way analysis of variance (ANOVA) showed that the abundance of plankton structure at the three locations was significantly different (p<0.05). Keywords: Plankton Structure- IMTA- One-Way ANOVA- Karimunjawa Share Link | Plain Format | Corresponding Author (Siti Saodah Rifahyanti)

59	Aquatic Ecology and Conservation (International)	ABS-215
The roles of macroalgae in climate change mitigation: opportunities and challenges for marine-based carbon donor Tri Handayani (a*), Firman Zulpikar (a), Agus Kusnadi (a) (a)Research Center for Oceanography- National Research and Innovation Agency *handayanit1616[at]gmail.com Abstract Anthropogenic activities will lead to an exponential increase in CO2 emissions in the future. Increased CO2 emissions have an impact on global climate patterns, ocean acidification, and ecosystem function. Marine vegetation has the potential for CO2 absorption and carbon storage, known as ^blue carbon.^ Research on blue carbon in the world, including Indonesia, is more focused on seagrass and mangroves because including macroalgae carbon in the blue carbon strategy is still controversial. Currently, there are many considerations for including macroalgal carbon in the blue carbon strategy. Macroalgae have a shorter life cycle than seagrass and mangroves. In addition, macroalgae generally grow on hard substrates, resulting in lower levels of carbon storage than seagrass and mangroves. However, macroalgae can function as carbon donors and play a role in the context of climate change mitigation. In this review, we present the potential and challenges of macroalgae as carbon donors. Macroalgae will be significant as donor carbon if they have the following three criteria: high average biomass production- effective transfer of biomass to recipient habitat- and donor carbon must be able to be buried in recipient habitat. Keywords: macroalgae, blue carbon, climate change, carbon donor, sequestration Share Link | Plain Format | Corresponding Author (Tri Handayani)

60	Aquatic Ecology and Conservation (International)	ABS-218
The Relationship Between Species Diversity and Abundance of Chaetodontidae Family and Live Coral Cover in Spermonde Islands, Makassar Risandi Dwirama Putra (a) , Kasman Kasman (b), Kunto Wibowo(c), Petrus Christianus Makatipu (c), Ni Wayan Purnama Sari (c), Rikoh Manogar Siringoringo (c), Ucu Yanu Arbi (c), Ana Faricha3, Tri Aryono Hadi (c), Muin Sinaga (d), Frensly Damianus Hukom (c), Asep Mulyono (e), Tengku Ersti Yulika Sari (f*) a) Naval Architecture, Faculty of Engineering Faculty, Raja Ali Haji Maritime University, Tanjungpinang 29111, Indonesia b) Worldwide Fund for Nature - Indonesia, Graha Simatupang Tower 2 Unit C Lt 7th- 11th, Jakarta, Indonesia c) Reseacrh Centre of Oceanography, National Research and Innovation Agency, Jl. Pasir Putih 1 Ancol Timur Jakarta 11048, Indonesia d) Bintan Fisheries Department, Bintan Regency Government, Indonesia e) Geotechnology Research Center, National Research and Innovation Agency, JL. Sangkuriang, Kompleks LIPI, 40135, Dago, Kecamatan Coblong, Kota Bandung, Jawa Barat 40135 f) Department of Fishing Technology, Faculty of Marine Science and Fisheries, Universitas Riau, Kampus Bina Widya, Jalan HR Soebrantas Km 12,5 Kelurahan Simpang Baru Pekanbaru, Riau 28293 *nonnysaleh2010[at]hotmail.com Abstract Coral fish is one of the marine biotas that are highly sensitive to changes in coral reef ecosystems. Therefore, the presence or absence of specific reef fish species can describe the condition of coral reefs. This research investigates the relationship between the biodiversity and abundance of Chaetodontidae fish and the live coral cover in the Spermonde Islands, Makassar City. Reef fish data were collected using the Underwater Visual Census (UVC) method, and coral cover percentage data were collected using the Underwater Photo transect (UPT) method at thirteen sites location distributed in the Spermonde seawaters area. The result found a total of 21 species of Chaetodontidae fish representing in four genera with 348 individuals of the Chaetodontidae family, with the highest number of individual Chaetodontidae fish located at the MKSC05 (Kodingareng, Keke Island) with 55 individuals and the lowest personal abundance at MKSC06 Station (Gosong Bonebatang) with 12 individuals. The R2 determination coefficient linear regression analysis results between the Chaetodontidae fish species and the live coral cover was 0.1697. For the R2 determination coefficient, linear regression analysis between the number of Chaetodontidae fish and the live coral cover was 0.0471 Keywords: chaetodontidae- coral- fish- regression- spermonde Share Link | Plain Format | Corresponding Author (Risandi Putra)

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