The aquatic nymph stage of the blue dasher dragonfly, Pachydiplax longipennis. Dragonfly nymphs are voracious predators of mosquito larvae. Photo by Andrew Davidson.

Asymmetrical effects of temperature on stage‐structured predator–prey interactions

Cold-blooded animals, such as insects, reptiles and fish, rely on their surroundings to warm their bodies to temperatures needed for basic activities, such as foraging for and digesting prey. Under warmer conditions, foraging and digestion typically occur more rapidly than they would under cooler conditions. Thus, global warming is expected to make cold-blooded predators “hungrier”, increasing the rate at which they hunt for and consume … Continue reading Asymmetrical effects of temperature on stage‐structured predator–prey interactions

The role of fishes as food: A functional perspective on predator-prey interactions

Mihalitsis, Michalis; Hemingson, Christopher; Goatley, Christopher; Bellwood, David Every animal dies. For fishes on coral reefs, the smaller you are, the more likely this is to happen. Small fish fit easily in the mouth of a bigger fish. However, fishes have many defence strategies against predators. Some relate to how the fish is shaped, while others are behavioural. For example, some fishes have evolved deeper … Continue reading The role of fishes as food: A functional perspective on predator-prey interactions

Impalas looking for predators in Hwange National Park, Zimbabwe. Copyright S. Périquet and Zone Atelier Hwange (LTSER CNRS France).

Disentangling the roles of bottom-up and top-down drivers in the trade-off between food acquisition and safety in prey with multiple predators

Olivier Pays, Pierrick Blanchard, Simon Chamaillé-Jammes, Marion Valeix, Andrew J Loveridge, David W Macdonald, Stéphanie Périquet, Esther van der Meer, Patrick Duncan, Godfrey Mtare, Hervé Fritz To survive, prey have to combine acquiring food with avoiding predators. In the wild, it is however very challenging to quantify the effect of predators on the feeding strategy of prey when the spatial distribution of food is not … Continue reading Disentangling the roles of bottom-up and top-down drivers in the trade-off between food acquisition and safety in prey with multiple predators