Abstract Understanding consumption patterns and preferences of particular life stages for fish species can clarify potential dietary overlap and identify energy flow within aquatic communities. Age-0 white bass (Morone chrysops) have been documented to consume a variety of prey items and zooplankton are a common occurrence. The importance of particular zooplankton taxa and available sizes will likely impact prey selectivity, which is not understood for age-0 white bass. The objectives of this study were to evaluate food habits, prey electivity, and size selectivity of age-0 white bass in an irrigation reservoir from July to September 2015 and 2016. By number, age-0 white bass consumed mostly zooplankton from July to September. Consumption of fish become an important component of the diet for 22% of fish starting at 80 mm TL. Calanoida were the primary zooplankton taxa consumed and selected for by age-0 white bass. In relation to other zooplankton taxa, Calanoida were one of the most abundant taxa groups available and age-0 white bass displayed size selective feeding by consuming the larger Calanoida available in the environment. While Calanoida are not the largest taxa available, their high density appears to result in higher consumption by age-0 white bass compared to other available taxa.

中文翻译：

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内布拉斯加州中南部灌溉水库中 0 岁白鲈的夏季饮食习性和猎物分类群和大小选择性

摘要 了解鱼类特定生命阶段的消费模式和偏好可以澄清潜在的饮食重叠并确定水生群落内的能量流动。0 岁的白鲈（Morone chrysops）已被记录为消耗各种猎物，浮游动物是一种常见现象。特定浮游动物分类群和可用大小的重要性可能会影响猎物的选择性，而 0 岁的白鲈则不了解这一点。本研究的目的是评估 2015 年 7 月至 2016 年 7 月至 9 月和 2016 年灌溉水库中 0 岁白鲈鱼的饮食习惯、猎物选择性和大小选择性。 从数量上看，0 岁白鲈鱼在 7 月至 9 月主要食用浮游动物. 对于 80 毫米 TL 开始的 22% 的鱼，食用鱼成为饮食的重要组成部分。Calanoida 是主要的浮游动物分类群，被 0 岁的白鲈食用和选择。与其他浮游动物分类群相比，Calanoida 是可用的最丰富的分类群之一，0 岁的白鲈通过食用环境中可用的较大 Calanoida 显示出大小选择性进食。虽然 Calanoida 不是可用的最大分类群，但与其他可用分类群相比，它们的高密度似乎导致 0 岁白鲈的消费量更高。