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首页> 外文期刊>ICES Journal of Marine Science >Experimental assessment of circle vs. J hook performance and selectivity in the northern Gulf of Mexico recreational reef fish fishery
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Experimental assessment of circle vs. J hook performance and selectivity in the northern Gulf of Mexico recreational reef fish fishery

机译：墨西哥湾北部休闲珊瑚礁鱼类捕捞圈与J钩性能和选择性的实验评估

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摘要

Few data exist to evaluate the performance or assess the potential impacts of hook regulations on catchability or selectivity of recreational fisheries in the northern Gulf of Mexico. The purpose of this study was to test the effects of hook type (circle vs. J hook) and hook size (1/0, 4/0, and 7/0) on catch composition, traumatic hooking, species-specific catches, and size-selectivity of red snapper, Lutjanus campechanus, and grey triggerfish, Balistes capriscus. Selectivity was estimated by conditioning size distributions from hook-specific catches against in situ size distributions observed with a remotely operated vehicle. Deep hooking (hook set in gills or beyond) was low in all hook treatments for red snapper (< 10%) and grey triggerfish (< 6%), but was generally higher with J hooks, especially for other fishes caught with the largest J hook (34%). Hook type did not significantly affect catches, but catches decreased significantly with increasing hook size in all groups except red snapper. Selectivity curves were dome-shaped for both focus species in all hook treatments and selection peaks were similar among treatments for red snapper. Peak selectivity was 78.1mm larger for J hooks than circle hooks for grey triggerfish. Overall, study results indicate that the circle hook regulation may have reduced traumatic hooking mortality by up to 50%, and that catchability is similar between hook types for both red snapper and grey triggerfish when controlling for hook size. Strong dome-shaped selection estimated for nearly all selectivity curves suggest logistic size-selectivity assumptions in assessment models are likely inappropriate for recreational sectors targeting red snapper or grey triggerfish.
机译：很少有数据可用来评估性能或评估钩规对墨西哥湾北部休闲渔业的可捕性或选择性的潜在影响。这项研究的目的是测试钩子类型（圆钩与J钩子）和钩子大小（1 / 0、4 / 0和7/0）对渔获物组成，外伤性钩子，特定种类渔获物和红鲷鱼，Lutjanus campechanus和灰色引金鱼Balistes capriscus的大小选择性。选择性是通过根据特定于钩的捕获物的尺寸分布与遥控车辆所观察到的原位尺寸分布进行估算的。在红鲷鱼（<10％）和灰鲷鱼（<6％）的所有钩处理中，深钩（在set中或以上的钩）均较低，但通常在J钩中较高，特别是对于J较大的其他鱼类钩子（34％）。钩子类型对捕捞量没有显着影响，但除红鲷鱼外，所有种类的捕捞量均随着钩子大小的增加而显着下降。在所有钩处理中，两种焦点物种的选择性曲线均为圆顶形，并且在红鲷鱼处理之间的选择峰相似。 J钩的峰值选择性比灰色引金鱼的圆形钩大78.1mm。总体而言，研究结果表明，圆形钩规可将创伤性钩死亡率降低多达50％，并且在控制钩大小时，红鲷鱼和灰色引金鱼的钩类型之间的可捕性相似。对几乎所有选择性曲线估计的强圆顶形选择表明，评估模型中逻辑对数选择性的假设可能不适合针对红鲷鱼或灰色引金鱼的娱乐部门。

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