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首页> 外文期刊>ICES Journal of Marine Science >Coupled changes in biomass and distribution drive trends in availability of fish stocks to US West Coast ports
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Coupled changes in biomass and distribution drive trends in availability of fish stocks to US West Coast ports

机译：生物量和分布的变化共同驱动着美国西海岸港口鱼类资源的供应趋势

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摘要

Fishing communities are increasingly required to adapt to environmentally driven changes in the availability of fish stocks. Here, we examined trends in the distribution and biomass of five commercial target species (dover sole, thornyheads, sablefish, lingcod, and petrale sole) on the US west coast to determine how their availability to fishing ports changed over 40years. We show that the timing and magnitude of stock declines and recoveries are not experienced uniformly along the coast when they coincide with shifts in species distributions. For example, overall stock availability of sablefish was more stable in southern latitudes where a 40% regional decline in biomass was counterbalanced by a southward shift in distribution of >200km since 2003. Greater vessel mobility and larger areal extent of fish habitat along the continental shelf buffered northerly ports from latitudinal changes in stock availability. Landings were not consistently related to stock availability, suggesting that social, economic, and regulatory factors likely constrain or facilitate the capacity for fishers to adapt to changes in fish availability. Coupled social-ecological analyses such as the one presented here are important for defining community vulnerability to current and future changes in the availability of important marine species.
机译：越来越多的捕捞社区需要适应环境驱动的鱼类资源供应变化。在这里，我们研究了美国西海岸五种商业目标物种（多尾sole，棘y，s鱼，lingcod和petrale sole）的分布和生物量趋势，以确定其在捕捞港口的可利用性在40年内如何变化。我们显示，当种群下降和恢复与物种分布的变化同时发生时，它们沿着海岸分布的时间和幅度并不统一。例如，自2003年以来，南部纬度地区的紫貂总体种群供应量更为稳定，该地区生物量下降了40％，而南向分布> 200 km的分布抵消了该地区生物量的下降。更大的船只机动性和大陆架上鱼类栖息地的面积扩大缓冲北方港口免受存货的纵向变化的影响。着陆与存量供应并不总是相关的，这表明社会，经济和监管因素可能会限制或促进渔民适应鱼类供应变化的能力。结合本文进行的社会生态分析，对于确定社区对于重要海洋物种的当前和未来变化的脆弱性非常重要。

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