Shelf break exchange processes influence the availability of the northern shortfin squid, Illex illecebrosus , in the Northwest Atlantic
Shelf break exchange processes influence the availability of the northern shortfin squid, Illex illecebrosus , in the Northwest Atlantic
复制标题
货架断裂交换过程影响西北大西洋北短鳍鱿鱼（Illex illecebrosus）的供应
DOI：
10.1111/fog.12640
复制
发表时间：
2023
影响因子：
2.6
通讯作者：
Hocking, Daniel J.
中科院分区：
文献类型：
--
作者：
Salois, Sarah L.;Hyde, Kimberly J.;Silver, Adrienne;Lowman, Brooke A.;Gangopadhyay, Avijit;Gawarkiewicz, Glen;Mercer, Anna J.;Manderson, John P.;Gaichas, Sarah K.;Hocking, Daniel J.
美国北方短鳍鱿鱼渔业以年渔获量波动大而闻名。在过去的5年中，这种渔业经历了沿美国东北部大陆架（内斯）的Illex illecebrosus的可用性增加，导致单位努力量（CPUE）的高渔获量和由于配额限制而导致的早期渔业关闭。渔业发生在西北大西洋，其复杂的动力学是由大尺度湾流，中尺度涡，陆架急流和陆架-斜坡交换过程之间的相互作用建立的。我们理解和量化这种区域变化的能力对于理解Illex的可用性模式是必要的，这在很大程度上受到海洋条件的影响。为了推进我们目前对该物种在内斯上相对丰度的季节性和年际变化的理解，我们使用广义加法模型来研究物理环境和生产力热点之间的关系。illecebrosusin是南方种群的组成部分，包括美国渔业。具体而言，我们通过将高分辨率遥感数据和全球海洋再分析物理数据与高分辨率渔业捕捞数据配对来获得海洋学指标。我们确定了一套环境协变量，这些协变量与较高捕捞率的情况密切相关。特别是，底部温度，温暖的核心环，地下功能，锋动态共同作为指标的栖息地条件和初级生产力热点，提供了很大的效用，了解Illex的分布与预测的潜力，季节性和年际可用性。
The United States Northern Shortfin squid fishery is known for its large fluctuations in catch at annual scales. In the last 5 years, this fishery has experienced increased availability ofIllex illecebrosusalong the Northeast US continental shelf (NES), resulting in high catch per unit effort (CPUE) and early fishery closures due to quota exceedance. The fishery occurs within the Northwest Atlantic, whose complex dynamics are set up by the interplay between the large‐scale Gulf Stream, mesoscale eddies, Shelfbreak Jet, and shelf‐slope exchange processes. Our ability to understand and quantify this regional variability is requisite for understanding the availability patterns ofIllex, which are largely influenced by oceanographic conditions. In an effort to advance our current understanding of the seasonal and interannual variability in this species' relative abundance on the NES, we used generalized additive models to examine the relationships between the physical environment and hotspots of productivity to changes in CPUE ofI. illecebrosusin the Southern stock component, which comprises the US fishery. Specifically, we derived oceanographic indicators by pairing high‐resolution remote sensing data and global ocean reanalysis physical data to high‐resolution fishery catch data. We identified a suite of environmental covariates that were strongly related to instances of higher catch rates. In particular, bottom temperature, warm core rings, subsurface features, and frontal dynamics together serve as indicators of habitat condition and primary productivity hotspots, providing great utility for understanding the distribution ofIllexwith the potential for forecasting seasonal and interannual availability.