Bait loss and its potential effects on fishing power in pelagic longline fisheries
Bait loss and its potential effects on fishing power in pelagic longline fisheries
复制标题
饵料损失及其对中上层延绳钓渔业捕捞能力的潜在影响
DOI：
10.1016/j.fishres.2007.05.002
复制
发表时间：
2007
影响因子：
2.4
通讯作者：
R. Myers
中科院分区：
文献类型：
--
作者：
P. Ward;R. Myers
我们分析了20世纪50年代的调查数据与广义估计方程（GEE）量化因素的影响率，诱饵是从远洋延绳钓丢失。钩深，诱饵品种，当地的金枪鱼丰度，延绳钓作业的时间强烈影响损失率。损失率随着金枪鱼丰度和浸泡时间的增加而增加。它们随着钩的深度而下降，并且对于身体结实的诱饵（如鱿鱼）来说很低。许多延绳钓船在1970年代中期开始用深延绳钓大眼金枪鱼，并从1980年代开始使用鱿鱼诱饵。这可能导致捕捞能力增加，对根据渔获量和捕捞努力量数据估计丰度具有重要影响。
We analyzed 1950s survey data with generalized estimating equations (GEEs) to quantify factors that influence the rate that bait is lost from pelagic longlines. Hook depth, bait species, local tuna abundance, and the timing of longline operations strongly influenced loss rates. Loss rates increased with tuna abundance and soak time. They declined with hook depth and were low for firm-bodied bait, such as squid. Many longliners began targeting bigeye tuna with deep longlines in the mid 1970s and have used squid bait since the 1980s. This may have resulted in increased fishing power, with important implications for the estimation of abundance from catch and fishing effort data.