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副渔获问题在拖网渔业中尤为严重,因此囊网的网目选择性一直倍受关注。网目选择性常以Logistic或Richards方程来描述。因方程所采用的变量不同而分为体长或主选择性曲线。研究过程中,常用套网法和比较作业法。针对这2种实验方法,作者综述了不同的解析方法以及不同实验间数据合并的条件。提出研究鱼类和渔具的作用,鱼类遭遇网渔具的影响因素以及如何建立合理的数学模型,推测主选择性曲线是渔具选择性研究的重点。
The problem of by-catches is particularly acute in trawl fisheries, and hence the mesh selectivity of the cysts has drawn much attention. Mesh selectivity is often described by Logistic or Richards equations. Due to the variables used in the equation are divided into body length or the main selectivity curve. In the course of research, commonly used net method and comparative method of operation. In response to these two experimental methods, the authors reviewed different analytical methods and the data merging conditions between different experiments. Proposed to study the role of fish and fishing gear, fishing gear encountered fish network and how to establish a reasonable mathematical model, suggesting that the main selectivity curve is the focus of research on gear selectivity.