Spatial Ecology of Atlantic Halibut across the Northwest Atlantic: A Recovering Species in an Era of Climate Change

IF 6.4 1区 农林科学 Q1 FISHERIES
N. Shackell, J. Fisher, Cornelia E. den Heyer, D. Hennen, A. Seitz, A. Le Bris, D. Robert, M. Kersula, S. Cadrin, R. McBride, Christopher H. McGuire, T. Kess, K. Ransier, Chang Liu, Andrew Czich, K. Frank
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引用次数: 12

Abstract

Abstract Interactions between spatial dynamics and stock structure in marine fishes have largely focused on stocks in decline; stock structure is rarely re-visited for expanding species. Here, the spatial ecology of Atlantic halibut (Hippoglossus hippoglossus L.), managed as four stocks in the Northwest Atlantic, is reviewed. Halibut collapsed under high exploitation in the mid-19th century, but the Canadian fisheries value has increased seven-fold since the early 2000s. Atlantic halibut’s thermal habitat has increased due to warming, possibly contributing to its expansion. Genomic evidence differentiates two populations in the four management units, whereas there is non-genetic spatial structure within each of the stock boundaries. There are different core juvenile areas and a diversity of spawning migration patterns influenced by timing, fish size, maturity state, and distance between summer-feeding and over-wintering habitats. From tagging studies, multiple estimates of median distance at recapture (⁓3-90 km) are much less than the spatial domain of each stock. Growth rates are faster in the warmer south, as predicted by growing degree day. The current perspective of Atlantic halibut spatial structure is that there are two distinct populations, and within each, there are subpopulations composed of multiple migratory contingents. The level of mixing on common spawning grounds both among and within subpopulations is only partly understood.
横跨西北大西洋的大西洋比目鱼的空间生态学:气候变化时代的一个恢复物种
摘要海洋鱼类的空间动力学和种群结构之间的相互作用主要集中在种群减少上;种群结构很少被扩展物种重新造访。本文对大西洋大比目鱼(Hippoglossus Hippoglossus L.)的空间生态学进行了综述。哈利布特在19世纪中期因高度开发而崩溃,但自21世纪初以来,加拿大的渔业价值增长了7倍。由于气候变暖,大西洋大比目鱼的热栖息地增加了,这可能是其扩张的原因之一。基因组证据区分了四个管理单元中的两个种群,而在每个种群边界内都有非遗传空间结构。有不同的核心幼鱼区,产卵迁徙模式的多样性受到时间、鱼类大小、成熟状态以及夏季觅食和越冬栖息地之间距离的影响。根据标记研究,重新捕获时中值距离的多重估计(⁓3-90 km)远小于每个股票的空间域。正如生长度日预测的那样,温暖的南方的增长速度更快。目前对大西洋大比目鱼空间结构的看法是,大比目鱼有两个不同的种群,每个种群中都有由多个迁徙特遣队组成的亚种群。在亚种群之间和内部的共同产卵场上的混合程度仅部分了解。
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来源期刊
CiteScore
25.20
自引率
0.90%
发文量
19
期刊介绍: Reviews in Fisheries Science & Aquaculture provides an important forum for the publication of up-to-date reviews covering a broad range of subject areas including management, aquaculture, taxonomy, behavior, stock identification, genetics, nutrition, and physiology. Issues concerning finfish and aquatic invertebrates prized for their economic or recreational importance, their value as indicators of environmental health, or their natural beauty are addressed. An important resource that keeps you apprised of the latest changes in the field, each issue of Reviews in Fisheries Science & Aquaculture presents useful information to fisheries and aquaculture scientists in academia, state and federal natural resources agencies, and the private sector.
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