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首页> 外文期刊>Fisheries Research >Unaccounted mortality of red king crab (Paralithodes camtschaticus) in deliberately lost pots off Northern Norway
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Unaccounted mortality of red king crab (Paralithodes camtschaticus) in deliberately lost pots off Northern Norway

机译：挪威北部故意遗失的盆中红色帝王蟹（Paralithodes camtschaticus）的死因未明

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摘要

During the 1960s, adult and juvenile red king crab (Paralithodes camtschaticus) were introduced to the Kola Peninsula with the aim of establishing a commercially exploitable stock in the Barents Sea. The stock has steadily increased and there is now a red king crab research fishery using pots. For various reasons, pots are occasionally lost, and concern has been expressed about whether lost pots could still catch crabs and thus contribute to a significant unaccounted mortality. An experiment was set up whereby pots were deliberately "lost" for periods of between 5 days and 1 year. A new design of rectangular collapsible pot was the main gear used, but in a single 5 days trial the traditional conical pot was used. All crabs caught were tagged and their lengths measured before they were returned to the pots. The crabs gradually left the pots and new ones entered. In a string of four pots, for example, all 92 tagged individuals left the pots after 4 months, while 61 new crabs entered them. Very few dead crabs were found in the pots. The size of the crabs increased with soak time in the rectangular pots, while it decreased with soak time in the conical pots. A relationship between soak time, crab catch and associated mortality was established.
机译：在1960年代，成年和少年红帝王蟹（Paralithodes camtschaticus）被引入科拉半岛，目的是在巴伦支海建立可商业利用的种群。种群稳定增长，现在有一个红色的帝王蟹研究捕捞用盆。由于各种原因，锅偶尔会丢失，并且人们担心丢失的锅是否仍会捉住螃蟹，从而导致大量无法说明的死亡率。建立了一个实验，故意将锅“丢失”了5天至1年。一种新设计的矩形可折叠锅是使用的主要装备，但在5天的试用期内，使用了传统的锥形锅。将所有捕获的螃蟹贴上标签，并测量其长度，然后将它们放回花盆。螃蟹逐渐离开花盆，新的螃蟹进入。例如，在一串四个锅中，所有92个带有标签的人在四个月后都离开了锅，而有61只新蟹进入了它们。在盆中几乎没有死蟹。螃蟹的大小随着在矩形锅中浸泡时间的增加而增加，而随着在锥形锅中浸泡时间的减少而减小。建立了浸泡时间，捕蟹量和相关死亡率之间的关系。

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