Multispecies spatial assessment models for the British Columbia groundfish trawl fishery
Multispecies spatial assessment models for the British Columbia groundfish trawl fishery
复制标题
不列颠哥伦比亚省底栖鱼拖网渔业的多物种空间评估模型
DOI：
10.1139/f98-205
复制
发表时间：
1999
影响因子：
2.4
通讯作者：
R. Bonfil
中科院分区：
文献类型：
--
作者：
C. Walters;R. Bonfil
提出了一个用于评估拖网管理策略的多物种空间模型，并用不列颠哥伦比亚省底层鱼的数据进行了检验。使用每单位努力渔获量的空间渔获量数据估计了16个物种的最小种群数量；这些数据表明，大多数种群中只有一小部分在任何时候都有可能被捕捞，而且渔场和其他生境之间的鱼类交换速度很快。空间力量分配的重力模型预测，由于捕捞力量的重新分配，海洋保护区或特定物种的遗弃对非目标物种/场地的重大副作用。多物种、多地面延迟-差异模型与空间努力分配的重力模型相结合，用于预测种群对各种调控策略的长期反应。这一模拟表明，由于长寿物种丰度的减少，渔业的物种组成和空间结构变化缓慢，但目标物种的迅速崩溃…
A multispecies spatial model is proposed for evaluation of trawl management strategies and tested with data from British Columbia groundfish. Minimum stock sizes are estimated for 16 species using spatial catch per unit effort data; these data indicate that only small proportions of most stocks are exposed to fishing at any time and that exchange rates of fish between the grounds and other habitats are rapid. A gravity model for spatial effort allocation predicts substantial side effects of marine protected areas or discarding of particular species on nontarget species/grounds due to redistribution of fishing effort. Multispecies, multiground delay-difference models are used in conjunction with the gravity model for spatial effort distribution to predict long-term population responses to various regulatory strategies. This simulation suggests that species composition and spatial structure of the fishery are changing slowly due to reduction in abundance of long-lived species, but rapid collapses of target ...