Influence of intra- and interspecific variation in predator-prey body size ratios on trophic interaction strengths.

ABSTRACT: Predation is a pervasive force that structures food webs and directly influences ecosystem functioning. The relative body sizes of predators and prey may be an important determinant of interaction strengths. However, studies quantifying the combined influence of intra- and interspecific variation in predator-prey body size ratios are lacking.We use a comparative functional response approach to examine interaction strengths between three size classes of invasive bluegill and largemouth bass toward three scaled size classes of their tilapia prey. We then quantify the influence of intra- and interspecific predator-prey body mass ratios on the scaling of attack rates and handling times.Type II functional responses were displayed by both predators across all predator and prey size classes. Larg

SUBMITTER: Cuthbert RN 

PROVIDER: S-EPMC7319243 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature