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Reproductive potential of red king crab (Paralithodes camtschaticus) across warm and cold stanzas in Bristol Bay in southwestern Alaska
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2024
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Source: Fishery Bulletin, 123(1), 1-12
[PDF-3.30 MB]
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Journal Title:Fishery Bulletin
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Description:The red king crab (Paralithodes camtschaticus) is an important commercial fishery species in Bristol Bay in southwestern Alaska. Mature male biomass is used currently in assessment of this stock as an estimate of stock reproductive potential, but assessments can be improved by directly incorporating female reproductive potential. The climate of the Bering Sea oscillates between warm and cold stanzas, which have important consequences for the ecosystem in this area. With this study, we have added to previous work quantifying the relationship between size and fecundity of females, by examining whether thermal regimes affect reproductive output. Egg clutches were collected in 8 different years spanning warm and cold stanzas, and the fecundity during each year was determined. Although we found small differences in the relationship between size and fecundity among years, the relationship did not differ between warm and cold years. Average embryo dry mass was slightly different among years but not between warm and cold years. Additionally, the relationship between residual fecundity and average egg mass was negative, indicating that some variance in fecundity is driven by trade-offs between embryo size and number. We present a size–fecundity model for Bristol Bay red king crab that could be used to estimate reproductive output from the annual survey of the population of red king crab in Bristol Bay and could be incorporated into stock assessments in the future.
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Source:Fishery Bulletin, 123(1), 1-12
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ISSN:0090-0656
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Rights Information:CC0 Public Domain
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Compliance:Submitted
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