海州湾坛子网网囊网目选择性研究  

A Study on the Selectivity of Codend Mesh of Tanzi Net in Haizhou Bay

作　　者：黄六一[1] 高慧良[1] 唐衍力[1] 刘长东[1] 许庆昌 孙鹏[1] 

机构地区：[1]中国海洋大学水产学院,山东青岛266003

出　　处：《中国海洋大学学报（自然科学版）》2016年第11期143-150,共8页Periodical of Ocean University of China

基　　金：公益性行业(农业)科研专项经费项目(201203018;201303050-2)资助~~

摘　　要：使用套网法在海州湾海域进行了坛子网3种网目尺寸(30、35和40mm)的网囊网目选择性试验。在分析渔获物组成的基础上,基于Logistic选择模型和数量生物量曲线(Abundance-biomass comparison curves,ABC曲线)法,获得了渔获物中主要经济品种小黄鱼(Pseudosciaena polyactis)、鹰爪虾(Trachypenaeus curvirostris)和口虾蛄(Oratosquilla oratoria de Haan)的选择性曲线和ABC曲线。结果表明,坛子网网囊网目尺寸为30、35和40mm时,小黄鱼的50%选择体长(L50)分别为7.920、9.503和11.229cm,选择范围(SR)分别为1.975、2.306和3.775cm;鹰爪虾的(L50)值分别为5.400、5.901和7.404cm,其SR值分别为1.283、1.376和1.709cm;口虾蛄的L50值分别为7.844、8.324和9.602cm,其SR值分别为2.680、2.719和2.973cm;随着网目尺寸逐渐增大,小黄鱼、鹰爪虾和口虾蛄选择性指标50%选择体长(L50)和选择范围SR值也随之逐渐增大。3种坛子网试验网囊内ABC曲线W值均小于0,表明针对海州湾目前整体生物群落,网囊网目尺寸需要进一步放大。本研究结果可为中国黄海区渔业资源可持续发展及张网网囊最小网目尺寸的确定提供科学参考。Tanzi net is a kind of double stake stow net.It is a traditional fishing gear in Haizhou Bay.On account of its lower cost,lower energy consumption and stable output,Tanzi net fishing has already become an important method.Because of its small mesh size of codend,a lot of young fish or shrimp are often caught.Such shortage has seriously negative influenced the offing fish resource.So it is necessary to carry out study on the selectivity of Tanzi net.It is the basal work of the study on the minimal mesh size of Tanzi net in Haizhou Bay.Referred to relevant research data,there is seldom studies on the size selectivity of stow net in Haizhou Bay.The selectivity of codend mesh of Tanzi with several mesh sizes（30,35 and 40mm）has been tested by using the cover-net method in Haizhou bay.Because the AIC value of the Logistic model is relatively smaller than that of other models and the model is the conventional used in researches on the selectivity of fishing gear,the Logistic model was selected as the selectivity model of this experiment.Also,abundance-biomass comparison curve（ABC curve）and biomass spectrum method were applied to analyzing the data too.Based on the analyses of the catches composition and the Logistic equation model and ABC curve,the authors obtained W value and the selectivity curve of the main economic varieties,P.polyactis,T.curvirostris and O.oratoria de Haan.Parameters of selectivity were estimated with the maximum likelihood method.The result showed that the 50%selection length,L50,of P.polyactis was 7.920,9.503 and 11.229 cm,and the selection range（SR）was 1.975,2.306 and 3.775 cm,respectively,when the mesh size was 30,35 and 40mm;the L50 of T.curvirostris was 5.400,5.901,7.404 cm and the SR was 1.283,1.376 and 1.709 cm,respectively,when the mesh size was 30,35 and 40mm;the L50 of O.oratoriade Haan were 7.844,8.324 and 9.602 cm,and the SR was 2.680,2.719 and 2.973 cm,respectively,when the mesh size was 30,35 and 40mm.Enlarging the mesh size of TanZi net increased the L50 and the SRof P.p

关 键 词：坛子网 网囊网目 选择性 套网法 ABC曲线 

分 类 号：S975[农业科学—捕捞与储运]