Molles M C, Pietruszka R D
Department of Biology, The University of New Mexico, 87131, Albuquerque, New Mexico, USA.
Oecologia. 1987 Jun;72(3):473-478. doi: 10.1007/BF00377582.
The influences of hunger and prey size on prey selection by the stonefly Hesperoperla pacifica (Perlidae) were explored in the laboratory by observing behavioral responses toward ten prey taxa and three nonprey taxa. Patterns of behavior were consistent with most assumptions and predictions of optimal foraging theory predicting sizebased prey selection by pursuing predators. Handling time appeared to increase as an exponential function of prey mass, and prey profitability (mg/s) was highest for small and intermediate-sized prey. Fasted stoneflies consumed a wide range of prey sizes, whereas well-fed stoneflies concentrated their attacks on intermediate-sized prey. Responses of H. pacifica to nonprey taxa, however, suggest that prey recognition and selection are not based on size alone.
通过在实验室中观察太平洋扁石蝇（扁石蝇科）对十种猎物分类群和三种非猎物分类群的行为反应，探究了饥饿和猎物大小对其猎物选择的影响。行为模式与最优觅食理论的大多数假设和预测一致，该理论预测追捕型捕食者会基于大小选择猎物。处理时间似乎随着猎物质量的指数函数而增加，小型和中型猎物的猎物盈利能力（毫克/秒）最高。饥饿的扁石蝇会捕食各种大小的猎物，而饱腹的扁石蝇则将攻击集中在中型猎物上。然而，太平洋扁石蝇对非猎物分类群的反应表明，猎物识别和选择并非仅基于大小。
