Environmental and Behavioral Effects on the Feeding Ecology of Two Planktivorous Fish

这项研究是为了调查重要的环境 影响两种广泛研究的摄食生态学的因素 食鱼;白色刺盖太阳鱼和蓝鳃太阳鱼。 的 待研究的环境因素包括光强度， 浊度水平，大量的水华蓝藻， 各种大小级别的浮游动物的可用性。 行为 这两个物种的搜索周期中的因素也将是 研究了影响猎物选择、摄食效率和 对捕食者的警惕，以及昼夜活动的影响 模式和饱足感对摄食行为的影响 的一般性的 跳跃式搜索将通过观察一个学校来建立， 种鱼（金色的闪光），看看这些鱼落在一个 搜索策略的梯度，从伏击到跳跃， 巡航 这些研究的结果将纳入 现有的食饵性鱼类饲养模式，该模式将 在大型室外环境中进行饲养试验， 竞技场。 这一系列研究的结果将是 捕食生态学研究者的理论兴趣 以及那些负责 湖库管理和野味生产 鱼.

This research is to investigate important environmental factors which affect the feeding ecology of two widely studied planktivorous fish: white crappie and bluegill sunfish. The environmental factors to be studied include light intensity, turbidity level, abundance of bloom-forming bluegreen algae, and availability of various size classes of zooplankton. Behavioral factors in the search cycle of these two species will also be studied which affect prey choice, feeding efficiency, and vigilance for predators, as well as the impact of diel activity patterns and satiation on feeding behavior. The generality of saltatory search will be established by observing a schooling species of fish (golden shiner) to see where such fish fall on a gradient of search strategies ranging from ambush to saltatory to cruise. The results of these studies will be incorporated into the existing model of planktivorous fish feeding, and the model will be tested against feeding trials performed in a large outdoor arena. The results of this series of studies will be of theoretical interest to those studying the ecology of predation as well as of practical interest to those responsible for the management of lakes and reservoirs and the production of game fish.