农业资源与环境学报2016，Vol.33Issue(5)：433-442,10.DOI:10.13254/j.jare.2016.0073
夏季东海区带鱼的网具选择性试验研究
Nets Selectivity of Capsule Size Diamond Mesh of Trichiurus haumela in East China Sea During Summer
摘要
Abstract
Because of the fishing pressure and frequent marine engineering lead to the deterioration of the offshore marine environment, hair-tail(Trichiurus haumela)resource was in a serious recession in East China Sea. For sustainable use of hairtail resource, a bottom trawl inves-tigation was conducted for selective test hairtail by using diamond mesh 50, 55, 60, 65, 70, 75 mm and 80 mm in the East China Sea in sum-mer 2014. Selectivity for different sizes of codend was analyzed and compared by using the method of set of network. The results showed that hairtail fish anal long range was 55~283 mm, the average anal was 159 mm long, advantage anal group was 140~190 mm long. The main anal codend hairtail fish long group distributed in 140~220 mm and major sets of anal distribution was in 130~190 mm long. Longer the average anal codend hairtail, body quality also increased gradually, as the mesh changed from small to big. The quantity and quality of body escape rate first decreased and then increased as the mesh increased. Because other non-target fish and shape of hairtail easy to hang net, the blocking effect of codend catches accumulation caused serious impact on relevant hairtail escape rate in the mesh. Chose the length according to 50%of hairtail(L0.5)with different mesh sizes fitting straight line:L0.5=2.241 9M+17.503(r=0.930), speculated the minimum mesh size of female hairtail catch L0.5 was 65.63 mm and the minimum mesh size of male hairtail L0.5 was 68.76 mm. Therefore suggested that specially used for fishing hairtail trawl mesh size was at least 65 mm,against to the current standards and fishery production. The study also indicat-ed the water temperature (surface temperature and bottom temperature)had effects on the distribution of hairtail mass density and man-tissa resources density. So seawater temperature was one of the important factors influencing the fishing gear selectivity.关键词
东海/带鱼/菱形网目/渔具选择性/海水温度Key words
East China Sea/hairtail/diamond mesh/fishing gear selectivity/water temperature分类
农业科技引用本文复制引用
黄洪亮,唐峰华,陈雪忠,张衡,李灵智,宋学峰,张胜茂,王德虎..夏季东海区带鱼的网具选择性试验研究[J].农业资源与环境学报,2016,33(5):433-442,10.基金项目
公益性行业（农业）科研专项 （）
