Vol. 3, Issue 3 (2018)
Observation of fish production and availability of aquatic inhabitants under pen culture in Chatol beel floodplain
Author(s): Chironjib Singha Samanta, Nirmal Chandra Roy, Angkur Chowdhury
Abstract: Present study concerned about the growth and production of fishes and availability of aquatic inhabitants in Chatol beel floodplain under pen culture technology for a period of 135 days. The pen enclosure was made by bamboo-split fence which covering an area about 2.43 ha. A combination of seven fish species–Labeo rohita, Catla, Cirrhinus cirrhosus, Ctenopharyngodon idella, Puntius gonionotus, Aristichthys nobilis and Labeo gonius were stocked in the pen at the ratio of 30:20:25:5:10:5:5 with the stocking density of 6250 fingerings/ha. The gross fish production of pen was 5282.9 kg, which included 4684.9 kg from stocked fish and 598 kg from non-stocked fish. The small indigenous species of fish (SIS) was dominant in the catches of non-stocked fish and total 20 different SIS species belonged to 12 families were being found with varying abundance. A total 9 species of phytoplankton, 5 species of zooplankton, 21 aquatic weeds and 9 taxa of benthic fauna were observed during study period. The net profit was US $ 3532 and cost- benefit ratio was 1:1.8, which delineate that composite fish culture through pen culture technology in floodplain area has immense possibilities for increasing fish production and financial gains.