The blackspot seabream (Pagellus bogaraveo) is a benthopelagic fish species highly appreciated by consumers and an important target of the Spanish and Moroccan fisheries in the transcontinental waters of the Strait of Gibraltar area. It is also one of the most exploited resources of the region, which has led to a situation of overexploitation and a notable drop of catches. To gain insight into the sustainability of this resource and certain patterns of the spatial adaptation of the species, a high-resolution circulation model coupled to a Lagrangian tracking module has been employed to investigate the dispersal pathways of blackspot seabream, using eggs and larvae (early-life-stages, ELS) as purely passive particles advected by currents. Several spawning scenarios consisting of different spatial (depths and sites) and temporal (tidal phase and strength) initial conditions have been analyzed to identify the most likely pathways of ELS dispersion. Eastward transport by the Atlantic Jet exiting the Strait of Gibraltar is the most influencing process in that dispersion. Regarding temporal fluctuations, fortnightly tidal modulation is the prevailing factor to determine the horizontal paths of the ELS, spring tides being the cause of the greatest scattering of propagules. Spawning depth in the Strait of Gibraltar is a critical condition, as revealed by the model sensitivity tests. Potential implications of the results of the study to improve the assessment and management of this species are discussed.

中文翻译：

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直布罗陀海峡及邻近盆地跨界物种 (Pagellus bogaraveo) 的水动力连通性和扩散模式

黑斑鲷 ( Pagellus bogaraveo )) 是深受消费者喜爱的底栖鱼类，也是直布罗陀海峡地区横贯大陆水域西班牙和摩洛哥渔业的重要目标。它也是该地区开发最多的资源之一，导致过度开发和渔获量显着下降。为了深入了解这种资源的可持续性和物种空间适应的某些模式，采用高分辨率环流模型与拉格朗日跟踪模块耦合，利用卵和幼虫（早期-生命阶段，ELS）作为由电流平流的纯被动粒子。已经分析了由不同空间（深度和地点）和时间（潮相和强度）初始条件组成的几种产卵情景，以确定 ELS 扩散的最可能途径。离开直布罗陀海峡的大西洋喷气机向东运输是该分散过程中影响最大的过程。关于时间波动，每两周一次的潮汐调制是确定 ELS 水平路径的主要因素，大潮是繁殖体最大散射的原因。正如模型敏感性测试所揭示的那样，直布罗陀海峡的产卵深度是一个关键条件。讨论了研究结果对改进该物种的评估和管理的潜在影响。离开直布罗陀海峡的大西洋喷气机向东运输是该分散过程中影响最大的过程。关于时间波动，每两周一次的潮汐调制是确定 ELS 水平路径的主要因素，大潮是繁殖体最大散射的原因。正如模型敏感性测试所揭示的那样，直布罗陀海峡的产卵深度是一个关键条件。讨论了研究结果对改进该物种的评估和管理的潜在影响。离开直布罗陀海峡的大西洋喷气机向东运输是该分散过程中影响最大的过程。关于时间波动，每两周一次的潮汐调制是确定 ELS 水平路径的主要因素，大潮是繁殖体最大散射的原因。正如模型敏感性测试所揭示的那样，直布罗陀海峡的产卵深度是一个关键条件。讨论了研究结果对改进该物种的评估和管理的潜在影响。正如模型敏感性测试所揭示的那样，直布罗陀海峡的产卵深度是一个关键条件。讨论了研究结果对改进该物种的评估和管理的潜在影响。正如模型敏感性测试所揭示的那样，直布罗陀海峡的产卵深度是一个关键条件。讨论了研究结果对改进该物种的评估和管理的潜在影响。