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首页> 外文期刊>Estuarine Coastal and Shelf Science >Daily variation in ingress of fall-spawned larval fishes into Delaware Bay in relation to alongshore and along-estuary wind components
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Daily variation in ingress of fall-spawned larval fishes into Delaware Bay in relation to alongshore and along-estuary wind components

机译：秋季产卵幼鱼进入特拉华湾的每日变化，与沿岸和沿河口的风向有关

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摘要

Identifying factors that affect ingress of larval fishes from offshore spawning areas into estuarine nurseries is important to improve understanding of variability in recruitment of many coastal marine species. This study investigated the ingress of larval Atlantic croaker (Micropogonias undulatus), Atlantic menhaden (Brevoortia tyrannus), and summer flounder (Paralichthys dentatus) at Roosevelt Inlet, near the mouth of Delaware Bay, USA in relation to short-term wind events. Nightly abundances, from November 15 to December 15, 2010, were analyzed with alongshore and along-estuary wind components (direction and speed) using cross-correlation analysis to determine if winds affect larval ingress. Ingress of Atlantic croaker and summer flounder correlated with along-estuary winds, whereas Atlantic menhaden showed no significant correlations with either alongshore or along-estuary winds. Although along-estuary winds during this period were predominantly down-estuary, Atlantic croaker ingress was correlated with positive along-estuary winds (blowing up-estuary), with a three-day lag; and a particularly large ingress peak occurred following the largest up-estuary wind peak. Ingress of summer flounder was correlated with negative along-estuary winds (blowing down-estuary), with a two-day lag. These results suggest that species-specific vertical position in the water column influenced ingress into Delaware Bay. The lag results also suggest that ingressing Atlantic croaker and summer flounder may have a pooling stage outside the mouth of Delaware Bay. (C) 2014 Elsevier Ltd. All rights reserved.
机译：确定影响幼体鱼从近海产卵区进入河口苗圃的因素，对于增进对许多沿海海洋物种招募中的变异性的了解很重要。这项研究调查了美国德拉瓦湾河口附近罗斯福湾入口的幼体大西洋黄花鱼（Micropogonias undulatus），大西洋鲱（Brevoortia tyrannus）和夏季比目鱼（Paralichthys dentatus）的侵入与短期风事件的关系。使用互相关分析来分析2010年11月15日至12月15日的夜间丰度，并使用沿海和沿河口风分量（方向和速度）进行分析，以确定风是否影响幼虫的进入。大西洋黄花鱼和夏季比目鱼的入侵与河口风相关，而大西洋鲱鱼与沿海或河口风均无显着相关性。尽管这段时期的河口风主要为河口下游，但大西洋黄花鱼的入侵与正的河口风（吹高的河口）相关，滞后三天。在最大的上入风峰之后出现了一个特别大的入口峰。夏季比目鱼的入侵与河口负风（河口下吹）相关，且滞后两天。这些结果表明，水柱中特定于物种的垂直位置影响到特拉华湾的进入。滞后结果还表明，进入大西洋的黄花鱼和夏季比目鱼可能在特拉华湾口外有一个聚集期。 （C）2014 Elsevier Ltd.保留所有权利。

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