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

Topic: Aquatic Ecology and Conservation (International)