Mangrove fringed shores provide protection against predators for the juvenile lemon sharks (Negaprion brevirostris), but they may not be the best hunting grounds. Sharks with a more explorative personality forage in more dangerous and fruitful offshore habitats, but only when the abundance of predators is low. Photo © Chelle Blais

Juvenile lemon sharks forage according to their personalities… Unless many predators are around

Dhellemmes, Felicie; Smukall, Matthew; Guttridge, Tristan; Krause, Jens; Hussey, Nigel The last three decades have seen animal ecologists focus more and more on animal personality. Animal personality describes the fact that individuals within a population differ consistently in their behaviour. For example, some animals of the same species are always more explorative than others, regardless of other traits like sex, age or size. Personality is … Continue reading Juvenile lemon sharks forage according to their personalities… Unless many predators are around

Group of rabbitfish Siganus virgatus feeding on a Sargassum assay on the reef crest of Pulau Satumu, Singapore. Photo credit: Andrew G. Bauman

Larger groups herbivorous fishes overcome fear effects and increase macroalgal removal on coral reefs

Bauman, Andrew G; Hoey, Andrew; Dunshea, Glenn; Fong, Jenny; Chan, Ian; Todd, Peter Coral reefs support a high abundance and diversity of fishes, including those that feed on plant material (herbivores) and predators that feed on other fish. One important group of herbivorous fishes called ‘browsers’ feed on large macroalgae (or seaweeds), helping to maintain healthy coral reefs. Studies show that browsers change where and … Continue reading Larger groups herbivorous fishes overcome fear effects and increase macroalgal removal on coral reefs

Coral degredation impairs learning of non-predators by Whitetail damselfish

Chivers, Douglas; McCormick, Mark; Faken, Eric; Edmiston, Jake; Ferrari, Maud The threat of predation is pervasive in the life of most prey animals. Prey must quickly assess the identity of all animals that they encounter. Many animals are predators, but many are not, and being able to quickly distinguish between the two is crucial for potential prey. If young animals can learn the identity of … Continue reading Coral degredation impairs learning of non-predators by Whitetail damselfish