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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Variability in swimming behavior among broods of blue crab (Callinectes sapidus) zoeae
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Variability in swimming behavior among broods of blue crab (Callinectes sapidus) zoeae

机译：蓝蟹植物中游泳行为的可变性（Calloinectes sapidus）zoeae

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Blue crabs (Callinectes sapidus) support economically important fisheries across the eastern United States, which have exhibited historical variability in recruitment. Blue crab zoeae develop in surface waters over the continental shelf, where they need to constantly swim upward in order to stay within surface currents to successfully disperse. Morphology influences the drag zoeae experience and their ability to produce thrust, and morphological traits can vary across the population, especially between larval broods. The objectives of this study were to characterize the swimming behavior of first stage C. sapidus zoeae, determine whether there were inter-brood differences in swimming behavior, and identify morphological traits that are correlated with swimming behavior. The swimming behavior of zoeae from nine blue crab broods were observed within 24 h of hatching using video recordings, and metrics relating to velocity, orientation, and path straightness were calculated. Individual zoeae exhibited substantial variability in behavior, and broods significantly differed for all behavioral metrics measured. A mixture model analysis identified two modes of behavior each for velocity, orientation, and path straightness. These behavioral modes exist within individual broods, but the proportions exhibiting each behavior varied. Some morphometrics were significantly correlated with behavior, though some hypotheses based on the theoretical mechanics of zoeal swimming were not confirmed. Zoeal swimming ability, in terms of velocity and path straightness, varies among individuals within broods, yet across broods patterns of behavior were somewhat similar. The behavioral groups observed may result in inequality in the energetic costs of swimming for zoeae within a given brood, as well as varying optimization of vertical swimming. These results highlight the importance of individual and brood variation in swimming behavior and demonstrate the relationship of morphology in determining swimming behavior. Future work investigating zoeal swimming mechanics and behavior should incorporate this population-level variation.
机译：蓝蟹（Calloinectes Sapidus）支持在美国东部的经济上重要的渔业，这些渔业在招聘中表现出历史变异性。蓝蟹Zoeae在大陆架上的表面水域开发，在那里他们需要不断向上游泳，以便保持在表面电流以成功分散。形态学影响阻力Zoeae经验及其产生推力的能力，而形态特征可以各种各样的人群，特别是在幼虫育雏之间。本研究的目的是表征第一阶段C. Sapidus Zoeae的游泳行为，确定游泳行为是否存在间歇性差异，并识别与游泳行为相关的形态特征。使用视频录制，在24小时内观察到Zoeae从九个蓝蟹队伍的游泳行为，以及与速度，方向和路径直线度有关的度量。单独的Zoeae在行为中表现出大量变异性，并且对于测量的所有行为指标，育雏显着不同。混合模型分析确定了两种行为模式，用于速度，方向和路径直线度。这些行为模式存在于各个巢穴内，但表现出每个行为的比例变化。一些形态化学与行为显着相关，但没有证实一些基于泻液游泳理论力学的假设。在速度和路径直线度方面，Zoeal游泳能力在巢穴中的个体之间变化，但跨巢的行为模式有点相似。观察到的行为群可能导致在给定育房中为Zoeae游泳的能量成本的不等式，以及不同的垂直游泳优化。这些结果突出了个体的重要性，并培养了游泳行为的变化，并证明了形态学在确定游泳行为方面的关系。调查Zoeal游泳机械和行为的未来工作应包括这种人口级别的变化。

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