Coupled changes in biomass and distribution drive trends in availability of fish stocks to US West Coast ports

Coupled changes in biomass and distribution drive trends in availability of fish stocks to US West Coast ports
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生物量和分布的耦合变化推动了美国西海岸港口鱼类资源供应的趋势

DOI:
10.1093/icesjms/fsz211
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发表时间:
2019
影响因子:
3.3
通讯作者:
Pinsky, Malin L.
Pinsky, Malin L.
中科院分区:
农林科学2区
文献类型:
--
作者:
Selden, Rebecca L.;Thorson, James T.;Samhouri, Jameal F.;Bograd, Steven J.;Brodie, Stephanie;Carroll, Gemma;Haltuch, Melissa A.;Hazen, Elliott L.;Holsman, Kirstin K.;Pinsky, Malin L.

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渔业社区越来越需要适应环境驱动的鱼类资源可得性变化。在这里,我们研究了美国西海岸五个商业目标物种(多佛唯一,棘头,sablefish,lingcod和petrale唯一)的分布和生物量的趋势,以确定它们在渔港的可用性如何在40年内发生变化。我们发现,股票下降和复苏的时间和幅度并没有经历均匀沿着海岸时,他们与物种分布的变化相吻合。例如,在南半球,黑鲷的总存量较为稳定,自2003年以来,该区域生物量下降40%,但分布南移200公里以上,抵消了这一下降。更大的船舶流动性和更大的面积范围内的鱼类栖息地沿着大陆架缓冲纬度变化的股票供应偏北港口。上岸量并不总是与鱼量有关,这表明社会、经济和监管因素可能限制或促进渔民适应鱼量变化的能力。结合社会-生态分析,如这里提出的一个是重要的,以确定社区的脆弱性,目前和未来的重要海洋物种的可用性的变化。
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 40 years. 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 >200 km 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.
以丰富的鱼类资源为目标,同时避免过度捕捞物种:视频和捕捞调查可为长期渔业关闭后的管理人员提供信息
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