Ichthyofauna of Alas River, around Soraya Research Station, Leuser Ecosystem Area, Subulussalam, Aceh

Abstract

The ichthyofaunal study is needed to reveal the diversity of fish, investigate the existence of native and introduced fish, inventory some species that are potential as consumed and ornamental fishes, and to be a part of the effort to find new species. This study aimed to determine the composition of freshwater fish in the Alas River around Soraya Research Station, Leuser Ecosystem Area, Subulussalam, Aceh. Research was conducted from July to September 2018. Fish sampling was carried out at six research stations using selective gill nets, throwing net, hook, tray net, and scoop net. A total of 339 individual’s fish belonging to 20 species, eight families and three orders was collected from sampling location. Cyprinidae was the predominant family found in the Alas River. As many of 16 fish species has the potential as consumption fish. Two introduced fishes were collected, namely tilapia (Oreochromis niloticus) and Amazon sailfin catfish (Pterygoplichthys pardalis). One fish species is thought to have the potential as a new species, i.e. catfish (Hemibagrus sp.). The result of this study can be used as a basic data for policy decision making in order to develop management program of Leuser ecosystem in the future.