Predicting potential spawning areas of European bass, Dicentrarchus labrax, in the Irish and Celtic seas
Predicting potential spawning areas of European bass, Dicentrarchus labrax, in the Irish and Celtic seas
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预测爱尔兰海和凯尔特海欧洲鲈鱼 Dicentrarchus labrax 的潜在产卵区
DOI：
10.1016/j.fishres.2023.106884
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发表时间：
2024
影响因子：
2.4
通讯作者：
Lincoln H
中科院分区：
文献类型：
--
作者：
Lincoln H
形成产卵聚集体的海洋鱼类往往容易受到剥削，例如欧洲鲈鱼（Dicentrarchus labrax）。关于鲈鱼产卵聚集的信息在时间和空间上都没有得到很好的解析。对 2014 年 7 月至 8 月和 2019 年从爱尔兰和凯尔特海的七个聚居河口收集的 0 组鲈鱼进行耳石日生长增量 (DGI) 计数，以估计产卵时间。这些计时参数化了三维流体动力学和拉格朗日粒子跟踪模型，反向运行，以识别可能的产卵位置。预计产卵发生在 4 月至 5 月之间（近海和近海），距每个聚居区 < 200 公里。预计至少有两个广泛的产卵区：爱尔兰海中部，导致北威尔士和英格兰西北部的幼体补充；以及爱尔兰海南部/凯尔特海，导致威尔士南部的幼体补充。结果表明，目前北方鲈鱼的季节性关闭可能无法保护产卵事件，从而推动威尔士和英格兰西北部的定居点的繁殖。地表温度以及风和潮汐驱动的地表水流决定了产卵地和定居地之间的连通性。预计未来大气驱动因素会发生变化，管理需要考虑产卵时间和地点的潜在区域变化。
Marine fish species that form spawning aggregations are often vulnerable to exploitation, such as the European bass (Dicentrarchus labrax). Information on bass spawning aggregations is not well resolved temporally and spatially. Otolith daily growth increment (DGI) counts were conducted on 0-group bass collected in July-August 2014 & 2019 from seven settlement estuaries in the Irish and Celtic seas, to estimate the timing of spawning. These timings parameterised three-dimensional hydrodynamic and Lagrangian particle tracking models, run in reverse, to identify probable spawning locations. Estimated spawning occurred between April-May (inshore and offshore) < 200 km from each settlement area. At least two broad spawning areas were predicted: the central Irish Sea that led to post-larval recruitment in north Wales and northwest England, and the southern Irish Sea/Celtic Sea that led to post-larval recruitment in south Wales. Results indicate the current seasonal closure for northern stock bass may not protect spawning events that drive recruitment into settlement sites in Wales and northwest England. Surface temperatures and wind- and tide-driven surface currents determined the connectivity between spawning and settlement sites. Atmospheric drivers are expected to change in the future and management needs to account for potential regional shifts in spawning times and locations.
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