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Tawny owl vocal activity is constrained by predation risk
Lourenço, Rui; Goytre, Fernando; Delgado, Maria del Mar; Thornton, Michael; Rabaça, João E.; Penteriani, VincenzoThe vocal behaviour of birds may be influenced by many factors, including the risk of being detected by a predator. In Doñana Protected Area, the tawny owl co-exists alongside its intraguild predator, the eagle owl Bubo bubo . We considered four scenarios to study the vocal behaviour of tawny owls at dusk by analysing: A) the calling rate of all males in 29 sites; B) the calling rate at dusk of males living wit...
Kill fore being killed: an experimental approach supports the predator-removal ...
Rabaça, J.E.; Lourenço, Rui; Penteriani, Vincenzo; Delgado, Maria del Mar; Marchi-Bartolozzi, MichelaIntraguild predation (IGP) has been explained in terms of competitor-removal, food-stress and predator removal hypotheses. Only the first two hypotheses have been fairly well studied. To test the predator-removal hypothesis as a force determining IGP in avian predators, we performed a field experiment to simulate the presence of an IG predator (eagle owl Bubo bubo dummy) in the surrounding of the nests of four ...
Intraguild predation by a European top predator – the Eagle Owl (Bubo bubo).
Lourenço, Rui; Rabaça, João E.; Delgado, Maria Del Mar; Penteriani, VincenzoIntraguild predation (IGP) is common species interaction, which on several occasions can drive the structure of ecosystems. Although within vertebrate top predators, IGP seems less frequent, some studies have described this phenomenon. The Eagle Owl (Bubo bubo) is one of the most common avian top predators in Europe, and the possible interaction with endangered species is making conservationists consider the po...
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