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首页> 外文期刊>Canadian Journal of Fisheries and Aquatic Sciences >Fishing the line: catch and effort distribution around the seasonal haddock (Melanogrammus aeglefinus) spawning closure on the Scotian Shelf
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Fishing the line: catch and effort distribution around the seasonal haddock (Melanogrammus aeglefinus) spawning closure on the Scotian Shelf

机译：钓线：在科多尔架上的季节性黑线鳕（Melanogrammus aeglefinus）产卵场周围捕获和精力分配

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摘要

Permanent and seasonal area closures are a common regulatory strategy in multispecies fisheries; however, few studies have closely examined seasonal closures. We examined the impact of the Browns Bank spawning closure on the spatial distribution of fishing effort and how the fleet utilized a "fishing the line" strategy. Generalized estimating equations were used to examine changes in effort distribution when the closure was and was not in effect. Effort displaced from the bank concentrated primarily within two areas up to 30 km from the closure boundary, one along the east boundary line and one along the west. Trends in catch rate (as value) with distance from the line were further examined using generalized additive models during the closed period, with results differing between regions. In the east, areas of greater catch rate could be identified and typically corresponded to areas of greater effort, while in the west region, no trends in catch rates were often observed, potentially indicating vessel distributions that correspond to the ideal free distribution. Implementation of a seasonal area closure on Browns Bank resulted in concentrations of vessels near the closure boundary, suggestive of a fishing the line strategy, with specific catch rate trends depending on vessel spatial distributions and target species.
机译：永久性和季节性禁渔区是多物种渔业的共同监管策略;但是，很少有研究仔细检查季节性关闭。我们研究了布朗斯银行产卵场关闭对捕捞活动空间分布的影响，以及舰队如何利用“钓线”策略。当关闭生效和无效时，使用广义估计方程检查工作量分布的变化。从河岸转移的努力主要集中在距封闭边界30公里以内的两个区域内，一个沿东边界线，一个沿西边界。在封闭期间，使用广义的加性模型进一步检查了捕获率（作为值）随线距离的趋势，结果在区域之间有所不同。在东部，可以识别出捕获率更高的区域，通常对应于更大努力的区域，而在西部地区，通常没有观察到捕获率的趋势，这可能表明与理想的自由分布相对应的船只分布。在布朗斯银行实施季节性区域封闭措施导致封闭区域边界附近的船只集中，这暗示着采用钓线策略，具体捕获率趋势取决于船只的空间分布和目标物种。

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