Evaluating the influence of diet-related variables on breeding performance and home range behaviour of a top predator

摘要: Diet composition is linked to reproductive performance directly or indirectly by other life-history traits, including home range behaviour. The relationships between prey abundance, diet and individual fitness have often been explored. However, these are complex difficult disentangle, especially in vertebrate top predators. Here, we present the results of a long-term study using multi-model inference procedures elucidate influence diet-related variables on breeding parameters behaviour predator, eagle owl Bubo bubo. Superpredation, diversity, rat biomass rabbit mean weight were most important when analysing parameters, suggesting that less diverse diets with greater percentage may benefit performance, whereas apparently associated variation success. Earlier laying dates seem be consumption, average, smaller rabbits. On hand, edge density was relevant factor determining behaviour, characteristics, such as age sex, also being important. Although relative importance generally low, alternative prey, diversity helped explain parameters. In an optimal foraging context, centred abundance main species, our suggest rabbits available owls increase size order obtain increasing at same time their dietary which require higher movement speed.