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首页> 外文期刊>Estuarine Coastal and Shelf Science >Winter flounder (Pseudopleuronectes americanus) estuarine habitat use and the association between spring temperature and subsequent year class strength
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Winter flounder (Pseudopleuronectes americanus) estuarine habitat use and the association between spring temperature and subsequent year class strength

机译：冬季比目鱼（Pseudopleuronectes americanus）河口栖息地的使用以及春季温度与随后一年级强度之间的关系

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Winter flounder habitat use in New York/New Jersey Harbor was examined through a long-term (2002 -2010) bottom trawl sampling program (Aquatic Biological Survey) in which 5234 winter flounder were captured in 2069 samples collected at approximately 26 stations throughout the harbor. Interannual variability in catch-per-unit-effort (CPUE) primarily was attributable to fluctuations in Year-1 juvenile CPUE, which was positively correlated with total annual egg abundances from the previous year. Adult male CPUE during the spawning season was positively correlated with total egg abundances of the same year, whereas adult female CPUE was unrelated to annual egg abundances in the harbor. Annual variation in adult male densities in the harbor during the spawning season reflects the intensity of estuarine spawning activity, whereas adult female densities may include non-reproductive, foraging individuals. Seasonal fluctuations in condition indices reflected energy use during the spawning season, with relatively high condition in January, reduced levels in March and April, and elevated condition again in May. Adult CPUE peaked in April, coincident with the critical feeding period that follows spawning. Mean April water temperatures were positively correlated with egg abundances the following year and Year-1 juvenile CPUE two years later. A similar correlation between April temperatures and Year-1 juvenile abundances two years later was demonstrated using published data for winter flounder collected in Niantic Bay, CT. Higher April water temperatures may enhance benthic secondary production during the critical feeding period, and thus increase prey availability for foraging adults that need to restore energy reserves in order to reproduce the following year. A direct examination of benthic secondary production and variation in winter flounder estuarine foraging and subsequent spawning activity is needed to more fully understand this relationship.
机译：通过长期（2002年至2010年）底部拖网采样程序（水生生物调查），对纽约/新泽西港的冬季比目鱼栖息地使用情况进行了调查，在该计划中，在整个港口约26个站点收集的2069个样本中捕获了5234冬季比目鱼。每单位努力量（CPUE）的年际变化主要归因于一年级少年CPUE的波动，这与上一年的年度总蛋量呈正相关。产卵期的成年雄性CPUE与同一年的卵总丰度呈正相关，而成年雌性CPUE与港口的年卵丰度无关。产卵季节港口中成年雄性密度的年度变化反映了河口产卵活动的强度，而成年雌性密度可能包括非生殖，觅食的个体。条件指数的季节性波动反映了产卵季节的能源使用情况，1月条件较高，3月和4月水平降低，5月条件再次升高。成年CPUE在4月达到顶峰，与产卵后的关键喂养期相吻合。第二年的四月平均水温与卵的丰度呈正相关，第二年的一年级少年CPUE与卵的丰度呈正相关。使用在康涅狄格州Niantic Bay收集的冬季比目鱼的已公开数据，证明了4月的温度与两年后的1年级少年数量之间的相似关系。较高的四月水温可能会在关键的进食期增加底栖鱼类的次级生产，从而增加觅食成年的猎物的可利用性，成年后需要恢复能量储备才能繁殖。需要直接检查底栖次生和冬季比目鱼河口觅食的变化以及随后的产卵活动，以更充分地了解这种关系。

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