Identification of Planktones in Digestion of Seluang (Rasbora sp.) from The Musi River Downstream

Utilization of seluang fish (Rasbora sp.) for food and collection by the community as decorative to serve a source income. The objective research on identification plankton in digestion from Musi river downstream is determine type ingested fish, phytoplankton or zooplankton, which are fish's natural source. Prior domestication, variations can be exploited cultivation efforts knowledge. study was conducted May, June July 2019 at three stations. Samples caught were observed Biology laboratory Faculty Agriculture, University Muhammadiyah Palembang. dissected using scalpel, its put small jar containing 10% formalin solution. formalized, transferred into measuring cup with addition 10 ml an aqueduct, stirred until crushed under microscope petri dish. results showed that species Rasbora argyrotaenia borapetensis. In digestion, there consisting 4 classes, namely Cyanophycea, Chlorophyceae, Bacillariophyceae, Eugleanophycea, while only one class found, Entomostraca. composition greater than zooplankton Cyanophyceae predominating 34.7%. Thek-index diversity moderate, biota stable, dominance index indicates dominate each station. Water quality relatively normal station 2, value dissolved oxygen low-value pH. zooplankton.