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首页> 外文期刊>Fisheries Research >Reduced size composition and fecundity related to fishery and invasion history in the introduced red king crab ( Paralithodes camtschaticus) in Norwegian waters.
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Reduced size composition and fecundity related to fishery and invasion history in the introduced red king crab ( Paralithodes camtschaticus) in Norwegian waters.

机译：在挪威水域引入的红色帝王蟹（Parallidezodes camtschaticus）中与渔业和入侵历史有关的大小组成和繁殖力降低。

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摘要

The introduced red king crab ( Paralithodes camtschaticus) in the Barents Sea is abundant in the coastal waters of eastern Finnmark and supports a valuable fishery. In this paper we look at the development in size span among ovigerous females in the period between 1995 and 2010. We identify variations in individual fecundity in three fjords in Finnmark from 2000 to 2007. All the analyses were performed using regression and general linear models. We found that the size range decreased during this period. A decline in individual fecundity was observed. Individual egg weight (IEW) varied among fjords and years, and displayed a tendency to decline during the period of investigation, but the IEW was not affected by crab size. Increased fishing pressure on large males may have caused both a decline in size range of ovigerous females as well as a decline in fecundity. Reduced IEW however is likely to be due to limited available food. We attempted to compare individual fecundity in the invasive crab with fecundity results from populations in native areas. This comparison was inconclusive, due to differences in sampling season, size range and the methods employed.
机译：在巴伦支海引进的红色帝王蟹（Paralithodes camtschaticus）在芬马克郡东部的沿海水域丰富，并支持着宝贵的渔业。在本文中，我们观察了1995年至2010年期间雌雄同体的体型跨度的发展情况。我们确定了2000年至2007年期间Finnmark的三个峡湾中个体生殖力的变化。所有分析均使用回归模型和一般线性模型进行。我们发现大小范围在此期间减小。观察到个体繁殖力下降。峡湾和年份之间的个体蛋重（IEW）有所不同，并且在调查期间呈下降趋势，但IEW不受蟹大小的影响。大型雄鱼的捕捞压力增加，既可能导致雌雄异体大小范围的减少，也可能导致繁殖力下降。但IEW减少可能是由于可用食物有限。我们试图将侵入性螃蟹的个体繁殖力与本地种群的繁殖力结果进行比较。由于采样季节，大小范围和所用方法的差异，该比较尚无定论。

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