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首页> 外文期刊>Estuarine Coastal and Shelf Science >Diel variation of ichthyoplankton recruitment in a wind-dominated temperate coastal lagoon (Argentina)
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Diel variation of ichthyoplankton recruitment in a wind-dominated temperate coastal lagoon (Argentina)

机译：在一个以风为主的温带沿海泻湖（阿根廷）中的鱼鳞浮游动物募集的狄尔变化

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This study aimed to assess the diel changes of ichthyoplankton occurrence, during a known recruitment period, to a wind-dominated coastal lagoon (Argentina). We collected plankton samples at three sites of the lagoon's inlet area every 3 h during four 24 h cycles in mid austral summer. For each early-life history stage (eggs, yolk sac, preflexion larvae, postflexion larvae and early juveniles), the relationship between the abundance and possible combinations of the time of sampling, the wind effect, the wave period and the tidal state was evaluated by fitting generalized linear mix-effects models (GLMM). The wind effects depending on the time of sampling mainly affected fish abundance in all developmental stages. Overall, the highest abundances were collected at nocturnal hours when low-speed offshore winds blew. In addition, higher abundances of eggs, yolk sac and preflexion larvae were related to the incoming flood tide; whereas higher abundances of postflexion larvae and early juveniles were related to longer wave periods. We argued that the daily variation in the abundance of early-life history stages of fishes is related to the sea-land breeze cycle. Therefore, a conceptual framework of the recruitment process of eggs, larvae and early juveniles of fishes into this estuarine system considering the daily effect of winds is proposed. (C) 2018 Elsevier Ltd. All rights reserved.
机译：这项研究的目的是评估在已知的征募期间，以风主导的沿海泻湖（阿根廷）中鱼鳞浮游生物发生的diel变化。我们在夏季中期的四个24小时周期中每3小时在泻湖入口区域的三个位置收集浮游生物样品。对于每个生命早期阶段（卵，卵黄囊，屈曲前幼虫，屈曲后幼虫和早期幼鱼），评估了采样时间，风效应，波浪期和潮汐状态的丰度与可能组合之间的关系。通过拟合广义线性混合效应模型（GLMM）。取决于采样时间的风影响主要影响了鱼在所有发育阶段的丰度。总体而言，当低速海上风吹起时，在夜间收集的丰度最高。此外，较高的卵，卵黄囊和弯曲前幼虫的丰度与即将来临的洪水潮有关。而弯曲后幼虫和早期幼鱼的丰度较高与更长的波浪期有关。我们认为，鱼类早期生活史阶段的丰度每日变化与海陆风循环有关。因此，考虑到风的日常影响，提出了将鸡蛋，幼体和鱼类早期幼体募集到该河口系统中的概念框架。 （C）2018 Elsevier Ltd.保留所有权利。

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