The Current Status of the Red King Crab (Paralithodes camtschaticus) Stock and Fishery off Western Kamchatka

Ivanov P. Yu

摘要

The current status of the red king crab population off western Kamchatka is considered based on data from bottom trawl surveys and fishery statistics since 2013. Some biological parameters of this crab species are provided; its commercial stock is estimated; some features of red king crab fishery and determination of total allowable catch for the past 7 years are analyzed. The red king crab fishing was resumed in 2013 after an 8-year ban imposed due to the population decline. During this period, the stock recovered and reached values greater than those recorded before the ban: the total estimated size of red king crab population in 2017 was almost 244 million ind., which is the highest value for the recent 17 years of research; the estimated number of commercial-sized males, 110 million ind., has not been recorded from the western Kamchatka shelf for at least past 4 decades. Recently, the Severny Zapretny and Khairyuzovsky areas of the shelf zone have yielded their role of main feeding grounds for pre-recruit crabs and juveniles to the Ichinsky area located south. For the 7 years of red king crab fishery, harvest values have been steadily high. In the past 3 years, the major part of the annual catch of live crabs has been exported to China and South Korea. As the analysis of size structure show, the body size of male red king crabs has been increasing each year all over the shelf. This may be explained by the strict sorting of caught crabs aboard vessels transporting live crabs with the release of the largest individuals; another possible explanation is the relatively low recorded number of pre-recruits in the past 2 years. For the 7 years past (including 2019), the fishing mortality rate is estimated within a range of 5-16% of the crab stock actually recorded from the permitted fishery areas, which is a highly cautious approach. In the nearest future, the crab commercial stock is expected to gradually decrease, which, nevertheless, should not fall below the reference target value of biomass. The current status of the red king crab population off western Kamchatka does not raise concern, and the ongoing intense harvesting of this valuable species within the recommended catch size will not have any negative effect on its commercial stock.

机译：自2013年以来，基于来自底部拖网调查和渔业统计数据的数据来考虑红王蟹人群的现状。提供了这种蟹类的一些生物学参数;它的商业股票估计;分析了红王蟹渔业的一些特征和过去7年来确定总允许捕获。在由于人口衰退的8年禁止施加8年禁令后，红王蟹捕鱼被恢复。在此期间，股票恢复并达到的价值观大于禁令前记录的价值观：2017年红王蟹口的总估计规模近244万本身。，这是近17年的研究最高价值;估计数量的商业大小的雄性人数为1.1亿英寸。，尚未从西部堪察加架上记录至少4年。最近，塞尔维特尼和凯瑟里佐夫斯基地区的货架区占据了招聘前螃蟹和少年前往南部的伊希岛地区的主要喂养场所。对于7年的红王蟹渔业，收获价值稳步高。在过去的3年里，每年的活蟹的主要部分已出口到中国和韩国。随着对尺寸结构展的分析，男性红王蟹的体型每年都在架子上增加。这可以通过捕获螃蟹的严格分类来解释，这些船只随着最大个体的释放而运输活蟹的船只;另一种可能的解释是过去2年来录制的纪录次数相对较低。在过去的7年（包括2019年），捕捞死亡率估计在5-16％的螃蟹股票中，该螃蟹股票实际上从允许的渔业地区签订，这是一种非常谨慎的方法。在最近的未来，螃蟹商业股票预计将逐渐减少，然而，这不应低于生物质的参考目标值。红王螃蟹人群的现状从西部堪察加省昆明人不会引起关注，并且在建议的捕捞尺寸内对这种有价值物种的持续收集不会对其商业股票产生任何负面影响。

The Current Status of the Red King Crab (Paralithodes camtschaticus) Stock and Fishery off Western Kamchatka

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