CAJ | 학술논문

通过对90 mm、100 mm、110 mm和120 mm四种网目尺寸的银鲳流刺网进行选择性试验, 利用Nomal、Lognomal、Gamma和Bi-nomal模型,进行银鲳渔获数据拟合,采用极大似然法估算模型参数.结果表明:(1)银鲳流刺网具有较好的捕捞对象和尺寸选择性; (2)银鲳流刺网网目尺寸选择性最适表达曲线为Gamma曲线; (3)分别利用选择性曲线和体周两种方法,推算最适捕获银鲳叉长与网目尺寸的线性关系,获得关系式为a=0.252 8L;(4)参照目前银鲳开捕叉长的最新研究结果,东黄海区银鲳流刺网最小网目尺寸标准建议调整为100 mm.
통과대90 mm、100 mm、110 mm화120 mm사충망목척촌적은창류자망진행선택성시험, 이용Nomal、Lognomal、Gamma화Bi-nomal모형,진행은창어획수거의합,채용겁대사연법고산모형삼수.결과표명:(1)은창류자망구유교호적포로대상화척촌선택성; (2)은창류자망망목척촌선택성최괄표체곡선위Gamma곡선; (3)분별이용선택성곡선화체주량충방법,추산최괄포획은창차장여망목척촌적선성관계,획득관계식위a=0.252 8L;(4)삼조목전은창개포차장적최신연구결과,동황해구은창류자망최소망목척촌표준건의조정위100 mm.
Based on the selectivity research of the four mesh sizes (including 90 mm,100 mm,110 mm and 120 mm), Normal, Log-normal, Gamma and Bio-normal models were used to fit the silvery pomfret catches data, and model parameters were estimated by maximum likelihood method. The rational analysis showed : (1) The target and size selectivity of silvery pomfret gillnet is better than that of trammel net; (2)Gamma curve provided the best fit for gillnet selectivity; (3)The ratio between the fork length of optimum capture and mesh size was estimated by selectivity curve and girth, and the relational expression is: a= 0.252 8L; (4) According to the current research on the first landing fork length of silvery pomfret, the minimum mesh size of silvery pomfret gillnet in Yellow and East China Sea should be adjusted to 100 mm.