Study the diversity and seasonal variations of endangered fishes, plankton and benthos in Kanchan river of Dinajpur

Abstract

This research work was carried out from February to June, 2018 to monitor the present status of endangered fishes, productivity and overall health status of Kanchan river situated in Dinajpur district. Water and sediment samples were collected twice in a month during the study period from the selected five different sampling sites along with required information about the availability of threatened fishes. The findings noted over 28 available threatened fish species in Kanchan river including several commonly available threatened fishes (Endangered: Acanthocobitisbotia, Somileptesgongota, Botiadario, Botialohachata, Bariliustileo, Barilusbengalensisetc.; Critically endangered: Channabarca, Labeonandina, Clupisomagaruaetc.) which are very rear in nationwide. Common planktonic flora and fauna of this riverine ecosystem were also identified. In the river several phytoplankton (Asterionella sp., Tabellaria sp., Clostridium sp. etc.) and zooplankton (Brachionus sp.) were monitored as season specific. Abundance of plankton were analyzed statistically significant (p