Predation by juvenile piscivorous bluefish (Pomatomus saltatrix): the influence of prey to predator size ratio and prey type on predator capture success and prey profitability
Predation by juvenile piscivorous bluefish (Pomatomus saltatrix): the influence of prey to predator size ratio and prey type on predator capture success and prey profitability
复制标题
幼鱼食鱼蓝鱼 (Pomatomus saltatrix) 的捕食：猎物与捕食者大小比例和猎物类型对捕食者捕获成功和猎物盈利能力的影响
DOI：
10.1139/f98-056
复制
发表时间：
1998
影响因子：
2.4
通讯作者：
D. Conover
中科院分区：
文献类型：
--
作者：
F. Scharf;J. Buckel;F. Juanes;D. Conover
研究了0岁青鱼幼鱼捕食条纹鲈鱼幼鱼（Morone saxatilis）和大西洋银鱼幼鱼（Menidia Menidia）的捕获成功率、处理时间、猎物脆弱性和猎物盈利能力与猎物长度/捕食者长度比的关系。在长度比为0.20 ~ 0.65之间，青鱼捕获成功率呈线性下降，处理时间呈指数增长。然而，与大西洋银鱼相比，以条纹鲈鱼幼鱼为食的蓝鱼捕获成功率较低，处理时间增加的速度更快。以捕食率衡量的猎物脆弱性随着每一种猎物长度比的增加呈指数下降。各猎物种类的盈利能力曲线呈圆顶状；然而，不同猎物种类的盈利能力值和圆顶峰的位置不同。捕获成功函数与场长分布相结合，得到场长的期望频率分布。
Capture success, handling time, prey vulnerability, and prey profitability were examined as a function of prey length/predator length ratio for age-0 juvenile bluefish (Pomatomus saltatrix) feeding on juvenile striped bass (Morone saxatilis) and Atlantic silverside (Menidia menidia). For each prey species, bluefish capture success declined linearly and handling time increased exponentially with increasing length ratios between 0.20 and 0.65. However, bluefish capture success was lower and handling times increased at a faster rate when feeding on juvenile striped bass compared with Atlantic silverside. Prey vulnerability, measured as bluefish predation rate, declined exponentially with increasing length ratios for each prey species. Profitability curves were dome shaped for each prey species; however, profitability values and the location of dome peaks differed between prey species. Capture success functions were combined with field length distributions to generate expected frequency distributions of lengt...