A Study on the Catch Composition of Set Bag Net Used in the Ramnabad River, Patuakhali District (in Bangladesh)

Abstract

The field study was conducted on the set bag net (Behundi jal) fishery and species composition of set bag net in the Ramnabad River adjacent to the Galachipa upazila of Patuakhali district. The study was conducted for a period of eight months from July-2012 to February-2013. A total of twelve fishes and shellfishes such as Poa, Tengra, Ilish, Chewya, Golda chingri, Ramsos, Horina chingri, Kajli, Chapila, Motka chingri, Dogri, Boiragi were identified in the catches of set bag net used by the fishermen during the study period. Among that species Chewya (Taenioides cirratus ) and Horina chingri (Metapenaeus monoceros) were the dominant fishes. The Chewya was dominant in winter season while salinity was high. Horina chingri was dominant in rainy season when water current increased. The other fishes were found a little amount but not significant and had no relation with salinity and current. Salinity and water current was the main factors for the variation of total catch and availability of fish. In July to October the water level of the river remained high, so the abundance and availability of fish was high. For fishing fishermen used set bag net from July to February when the water level was high in rainy season and salinity was high in winter season. During high tide the water entered into the adjacent estuary and the fishermen used set bag net in the mouth of the estuary.

Keywords: Catch composition, set bag net, SBN, Ramnsbad River