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
Topic: Aquatic Ecology and Conservation (International)
