Other interspecific interactions, however, such as parasitism and higher-order predation, have the potential to modify predator–prey interactions and thus the predictive capability of the comparative functional response approach. Predatory functional responses play integral roles in predator–prey dynamics, and their assessment promises greater understanding and prediction of the predatory impacts of invasive species. The combined effects of parasitism and higher-order predator on the predatory functional responses of native Gammarus duebeni celticus (unparasitised or parasitised with Pleistophora mulleri) and invasive Gammarus pulex amphipods (unparasitised or parasitised with Echinorhynchus truttae) towards Baetis rhodani prey. The combined effects of parasitism and higher-order predator on the predatory functional responses of native Gammarus duebeni celticus (unparasitised or parasitised with Pleistophora mulleri) and invasive Gammarus pulex amphipods (unparasitised or parasitised with Echinorhynchus truttae) towards Simulium spp. The combined effects of parasitism and higher-order predator on the predatory functional responses of native Gammarus duebeni celticus (unparasitised or parasitised with Pleistophora mulleri) and invasive Gammarus pulex amphipods (unparasitised or parasitised with Echinorhynchus truttae) towards Asellus aquaticus prey.įig. Within community module differences (higher-order fish predator, focal amphipod predator, parasitism) in functional response attack rates ( a) and handling times ( h) for Asellus aquaticus, Simulium spp.
Parameter estimates (and significance levels) for logistic regression analyses of proportion of prey killed in relation of initial prey density for each combination of prey species – amphipod species (GDC – Gammarus duebeni celticus, GP – Gammarus pulex) – parasitism – higher-order (fish) predator
Detailed description of functional response model fitting and assessment of between and within community module differences.