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Three-dimensional ontogenetic shifts of groundfish in the Northeast Pacific
Fish and Fisheries ( IF 5.6 ) Pub Date : 2022-06-07 , DOI: 10.1111/faf.12679
Lingbo Li 1 , Anne B. Hollowed 1 , Edward D. Cokelet 2 , Michelle M. McClure 2 , Aimee A. Keller 3 , Steve J. Barbeaux 1 , Wayne A. Palsson 1
Affiliation  

It has been more than 100 years since fish were first described to move to deep waters as size increased, termed ‘Heincke's Law’. However, large-scale studies on ontogenetic shifts are rare compared with increased reports of distributional changes in response to temperature, often confounded with the ontogenetic shifts. We fill this gap by examining the distribution of ten abundant groundfish species in three dimensions, depth, latitude and longitude, at 10-cm size intervals within nine subregions of NE Pacific. Here, we utilized large, quality-controlled datasets from random depth-stratified, bottom trawl surveys consistently conducted during summer along the NE Pacific shelf from 1996 to 2015. Groundfish demonstrated complex ontogenetic movements in three dimensions across species, size class and subregion. In addition to the expected ontogenetic deepening, shoaling also occurred and some species demonstrated major ontogenetic shifts in longitude and/or latitude with limited changes in depth. Based on standardized ontogenetic shifts in three dimensions, our analyses show that there were significant differences in aggregate fish ontogenetic shifts between small (≤30 cm) and large (>30 cm) size groups. Small fish exhibited substantially larger ontogenetic shifts in depth than the large size group while both groups showed relatively small shifts in latitude and longitude. Our analyses strongly suggest that size structure and ontogenetic shifts should be included in the population distribution.

中文翻译:

东北太平洋底层鱼类的三维个体发育变化

自从鱼被首次描述为随着尺寸的增加而移动到深水区以来,已经有 100 多年了,这被称为“海因克定律”。然而,与对温度响应的分布变化的报道增加相比,关于个体发生变化的大规模研究很少见,这通常与个体发生变化相混淆。我们通过检查 10 种丰富的底层鱼类物种在三个维度(深度、纬度和经度)中的分布来填补这一空白,在 NE 太平洋的 9 个子区域内以 10 厘米大小的间隔。在这里,我们利用了 1996 年至 2015 年夏季沿东北太平洋陆架持续进行的随机深度分层底拖网调查的大型质量控制数据集。底层鱼在物种、大小等级和次区域的三个维度上表现出复杂的个体发育运动。除了预期的个体发育加深外,还发生了浅滩,一些物种表现出经度和/或纬度的主要个体发育变化,深度变化有限。基于三个维度的标准化个体发育变化,我们的分析表明,小型(≤30 cm)和大型(> 30 cm)组之间的总体鱼类个体发育变化存在显着差异。小鱼在深度上的个体发育变化比大鱼大得多,而两组在纬度和经度上的变化相对较小。我们的分析强烈表明大小结构和个体发生变化应该包括在种群分布中。基于三个维度的标准化个体发育变化,我们的分析表明,小型(≤30 cm)和大型(> 30 cm)组之间的总体鱼类个体发育变化存在显着差异。小鱼在深度上的个体发育变化比大鱼大得多,而两组在纬度和经度上的变化相对较小。我们的分析强烈表明大小结构和个体发生变化应该包括在种群分布中。基于三个维度的标准化个体发育变化,我们的分析表明,小型(≤30 cm)和大型(> 30 cm)组之间的总体鱼类个体发育变化存在显着差异。小鱼在深度上的个体发育变化比大鱼大得多,而两组在纬度和经度上的变化相对较小。我们的分析强烈表明大小结构和个体发生变化应该包括在种群分布中。小鱼在深度上的个体发育变化比大鱼大得多,而两组在纬度和经度上的变化相对较小。我们的分析强烈表明大小结构和个体发生变化应该包括在种群分布中。小鱼在深度上的个体发育变化比大鱼大得多,而两组在纬度和经度上的变化相对较小。我们的分析强烈表明大小结构和个体发生变化应该包括在种群分布中。
更新日期:2022-06-07
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