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Study on fishing gears, species selectivity toward gears and catch composition of BSKB beel, Khulna, Bangladesh

机译:孟加拉国库尔纳市BSKB鳗鱼的渔具,对渔具的物种选择性和渔获物组成的研究

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摘要

An investigation on the types of fishing gear used and their species selectivity and effects on fishes of BSKB beel in Khulna was conducted from June '95 to January '96. Fishermen were found to follow 6 fishing techniques viz., netting, trapping, angling, spearing, dewatering and hand picking. Among them 23 types of the fishing gear was recorded to be used by the fishermen of which 7, 8, 4 and 4 are nets, traps, hooks and lines, and hand harpoon respectively. A total of 47 species of fish were identified in the catches of different gears used by the fishermen in BSKB beel. Particulars, mode of operation, fishing season and catch composition of different fishing gears were determined. Seine, cast and lift net, traps (charo, arinda and ghuni), and hooks and lines (dhawn and nol broshi) were recorded as nonselective gear considering the fish species caught. However, gill nets (punti, koi and fash jal), clasp nets (bhuti jal), some traps (khadom, tubo), hooks and lines (chip borshi, chasra) and all spears were used as more or less selective gear. With respect to species and its size fash jal, bhuti jal, trap (khadom, ramani), and koach, juti and jhupi among spears were regarded to be more or less large-species-gear. But punti jal, koi jal, trap (koi dughair, charo, tubo, arinda and ghuni), nol borshi and spear (ful-kuchi) were small-species-gear. Among all gears seine net, cast net, lift net, koi dughair and ramani were recorded deleterious for carps especially for stocked fingerlings. For relatively small sized wild fishes koi jal, punti jal and ghuni traps were identified as detrimental gear.
机译:从95年6月至96年1月,对库尔纳市使用的渔具类型及其种类选择性以及对BSKB鳗鱼的鱼类进行了调查。渔民被发现遵循了六种捕鱼技术,即渔网,诱捕,垂钓,长矛,脱水和人工采摘。其中有23种捕鱼工具可供渔民使用,其中7、8、4和4个分别是网,陷阱,钩和线以及手工鱼叉。在BSKB鳗鱼中,渔民使用的不同渔具的渔获物中共发现47种鱼。确定了不同渔具的细节,操作方式,捕鱼季节和渔获组成。考虑到所捕捞的鱼类,围网,铸网和吊网,诱捕器(charo,arinda和ghuni)以及钩和钓线(dawn和nol broshi)被记录为非选择性渔具。然而,刺网(punti,koi和fash jal),钩网(bhuti jal),一些诱捕器(khadom,tubo),鱼钩和鱼线(chip borshi,chasra)以及所有长矛都被用作或多或少的选择性装备。就物种及其大小而言,矛头中的fash jal,bhuti jal,trap(khadom,ramani)和koach,juti和jhupi被视为或多或少的大物种齿轮。但是蓬蒂加尔(punti jal),锦鲤(koi jal),陷阱(koi dughair,charo,tubo,alinda和ghuni),诺尔·波什(nol borshi)和长矛(ful-kuchi)都是小物种齿轮。在所有渔具中,围网,抛网,起重网,锦鲤,杜鹃花和拉玛尼都对鲤鱼特别是鱼种放养有害。对于相对较小的野生鱼类,锦鲤,蓬蒂贾尔和ghuni诱捕器被认为是有害渔具。

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