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首页> 外文期刊>Journal of Fish Biology >Ontogenetic variation in habitat associations for four flatfish species in the Gulf of Maine-Georges Bank regio
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Ontogenetic variation in habitat associations for four flatfish species in the Gulf of Maine-Georges Bank regio

机译：缅因州乔治湾地区四种比目鱼的栖息地协会的个体发育差异

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摘要

Multivariate ordination techniques were used to examine how size classes of four flatfish species, American plaice Hippoglossoides platessoides, winter flounder Pseudopleuronectes americanus, yellowtail flounder Limanda ferruginea and fourspot flounder Paralichthys oblongus, are related to bottom depth, bottom temperature, substratum grain size and temporal factors using a 35 year time series from autumn and spring in the Gulf of Maine-Georges Bank region. Depth had the most explanatory value during both seasons in most cases, with fish size generally increasing with depth. One exception was yellowtail flounder in the spring for which a temporal factor explained the most variance, reflecting an increase in size over the time series due to changes in fishing pressure. Temperature was secondarily important for yellowtail flounder in the autumn and for fourspot flounder in both seasons. Substratum type was secondarily important for winter and yellowtail flounders in the spring with smaller fish associated with larger substratum types. Seasonal associations with depth, temperature and substratum are related to seasonal spawning migrations, thermal preferences and other ecological factors.
机译：多变量排序技术用于检验四种比目鱼，美洲Hippoglossoides platesoides，美洲比目鱼Pseudopleuronectes，黄尾比目鱼Limanda ferruginea和四点比目鱼的大小类别与底部深度，底部温度，基质粒度和时间因素的关系。使用缅因州乔治湾地区的秋季和春季的35年时间序列。在大多数情况下，深度在两个季节中最具解释价值，鱼的大小通常随深度增加。一个例外是春季的yellow鱼比目鱼，其时间因素解释了最大的变化，反映了由于捕鱼压力的变化，随时间序列的大小增加。温度对于秋季的黄尾比目鱼和两个季节的四点比目鱼都至关重要。其次，对于冬季和春季的yellow鱼，地下类型是重要的，较小的鱼类与较大的地下类型相关。与深度，温度和底层的季节性关联与季节性产卵迁移，热偏好和其他生态因素有关。

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