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首页> 外文期刊>ICES Journal of Marine Science >Prespawning herring distribution in the Irish Celtic Sea between 2005 and 2012
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Prespawning herring distribution in the Irish Celtic Sea between 2005 and 2012

机译：2005年至2012年之间在爱尔兰凯尔特海的产卵鲱鱼分布

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Knowledge of the spatial distribution of species is fundamental to understanding trophic interactions and ecosystem structure. Intraspecies-specific dynamics and environmental factors shape species distribution within an ecosystem. Distribution patterns and the realized habitat of Atlantic herring (Clupea harengus), a key fish species in the Celtic Sea, were examined using distribution data collected during annual acoustic stock assessment surveys during 2005-2012. Distribution patterns during migration to spawning grounds were analysed using geostatistical methods, including modelling of variograms and comparing the centre of gravity (CG). Distribution patterns were further linked to oceanographic variables collected with the acoustic data to describe habitat. Herring density was greatest inshore along the spawning grounds and lower farther offshore. Herring shoals were clustered and randomly distributed during spawning migration. Variograms of fish densities described the global structure, with high local variability of the same order of magnitude as variability at a regional scale, indicating that no continuous structure can be found within the study area. The CG values showed that the average position of the population was located northeast. The realized habitat for herring encompassed a wide range of temperatures and salinities; therefore, oceanographic features were not a limiting factor for herring distribution during spawning migration. The present study changes the perception of the spatial distribution of the Celtic Sea herring stock from a more continuous distribution to a discrete model, with implications for trophic ecosystem modelling on local scales. Future studies of herring distribution and its influence within the Celtic Sea ecosystem would benefit from using the approach employed in the present study for analysing aggregation patterns.
机译：了解物种的空间分布是了解营养相互作用和生态系统结构的基础。种内特定的动力学和环境因素影响着生态系统中物种的分布。使用2005-2012年年度声学种群评估调查期间收集的分布数据，检查了凯尔特海的主要鱼类大西洋鲱（Clupea harengus）的分布模式和已实现的栖息地。使用地统计方法分析了迁移到产卵场期间的分布模式，包括对变异函数进行建模并比较重心（CG）。分布模式进一步与通过声学数据收集的海洋学变量联系起来，以描述栖息地。鲱鱼密度在产卵场沿岸最大，而离岸较远则更低。鲱鱼滩在产卵迁徙过程中成簇并随机分布。鱼密度的方差图描述了整体结构，局部变化高，幅度与区域尺度的变化相同，这表明研究区域内没有连续的结构。 CG值表明人口的平均位置位于东北。已实现的鲱鱼栖息地涵盖了广泛的温度和盐度；因此，海洋特征并不是产卵迁移过程中鲱鱼分布的限制因素。本研究将对凯尔特海鲱种群空间分布的认识从更连续的分布转变为离散的模型，这对地方尺度上的营养生态系统建模具有重要意义。鲱鱼分布及其在凯尔特海生态系统中的影响的未来研究将受益于使用本研究中分析聚集模式的方法。

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