Diversity and distribution of fish in the Lokop river, Leuser Ecosystem Area, Indonesia

Lokop is one of the villages in Serbajadi District, East Aceh Regency, Province. The village has a watershed named river Lokop. This located Leuser Ecosystem Area which inhabited by various aquatic biota, especially fish, with level diversity and distribution patterns that need to be studied analyzed conoftened. study used purposive sampling method, parameters being fish river. Data collection was carried out at 5 observation stations based on typology habitat, each station divided into three substations representing parts basin, bank basin approximately 50 m apart. Fish using plot 10 x m2. number plots 9 total 45 plots. results showed index (H') value 2.39 moderate category pattern uniform clusters. Out 17 species obtained, 8 (47%) were clustred, uniformly distributed 1 (6%) could not because only individual found.Keywords:FishRiverDiversityDistribution