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首页> 美国卫生研究院文献>PLoS Clinical Trials >Effect of pot design on the catch efficiency of snow crabs (Chionoecetes opilio) in the Barents Sea fishery
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Effect of pot design on the catch efficiency of snow crabs (Chionoecetes opilio) in the Barents Sea fishery

机译：盆设计对巴伦支海捕捞雪蟹（Chionoecetes opilio）的捕捞效率的影响

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摘要

The snow crab (Chioneocetes opilio) fishery in the Barents Sea is carried out by large offshore vessels, as the fishing grounds are located far from shore and the gear must be transported back and forth over long distances. Therefore, fishers use stackable conical pots that allow large numbers of pots to be carried on deck for each trip. One of the drawbacks of using stackable pots is that the entrance is at the vertex of the conical pot, which fishers claim does not provide the desired fishing efficiency. Thus, the goal of this study was to determine whether a different pot design would improve the catch efficiency of snow crabs. We investigated the efficiency of a new type of pot called the moon pot, which provides continuous increased bait odour intensity as snow crabs make their way towards the entrance of the pot. This alteration was expected to increase catch efficiency compared to that of the conical pots used by the fleet today. However, experimental fishing results showed that the modified pots had significantly lower catch efficiency than the standard conical pots, as only ~66% of the number of crabs caught by the conical pots were caught in the moon pots. The main reason for this reduced catch efficiency likely was the initial steepness of the moon pot, which may have made it difficult for crabs to reach the pot entrance. These results demonstrated that pot design can dramatically affect catch efficiency of snow crabs.
机译：巴伦支海的雪蟹（Chioneocetes opilio）渔业是由大型近海船进行的，因为渔场位于远离海岸的地方，渔具必须长距离来回运输。因此，渔民使用可堆叠的锥形锅，每次旅行都允许将大量锅放在甲板上。使用可堆叠式锅的缺点之一是入口在锥形锅的顶点，渔民声称这不能提供所需的捕捞效率。因此，本研究的目的是确定不同的锅具设计是否会提高雪蟹的捕捞效率。我们研究了一种新型的锅的效率，这种锅称为“月锅”，当雪蟹进入锅的入口时，该锅会不断增加诱饵的气味强度。与当今舰队使用的锥形锅相比，这种改动有望提高捕捞效率。但是，实验捕鱼的结果表明，改良型盆的捕捞效率比标准锥形盆低得多，因为锥形盆捕捞的螃蟹数量中只有〜66％被捕到了月亮盆中。捕捞效率降低的主要原因可能是月锅最初的陡度，这可能使螃蟹难以到达锅的入口。这些结果表明，锅的设计可以极大地影响雪蟹的捕捞效率。

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