La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Male and female Black-tailed Gulls Larus crassirostris feed on the same prey species but use different feeding habitats (2018)
Auteurs :	Kentaro Kazama, Auteur ; Bungo Nishizawa, Auteur ; Shota Tsukamoto, Auteur ; Jordi E. Gonzalez, Auteur ; Mami T. Kazama, Auteur ; Yutaka Watanuki, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (159(4) October 2018)
Article en page(s) :	923-934
Langues:	Anglais
Mots-clés:	Coastal habitats ; Fisheries discard ; Foraging trip ; Global Positioning System tracking ; Sexual dimorphism
Résumé :	Sexual segregation in foraging habitats and associated diet differences have been reported in many seabirds. These sexual distinctions can be caused by differences in competitive ability or nutritional requirements. Here, we investigated the diets of male and female Black-tailed Gulls Larus crassirostris by collecting regurgitations during the incubation period and examining foraging behaviours and habitat use via tracking with Global Positioning System data loggers. In both males and females, the regurgitations predominantly contained Japanese Sand Lance Ammodytes personatus. Females were more likely than males to make long foraging trips. Males frequently foraged in fishing ports and fish processing plants; however, females rarely foraged in these locations. Males favoured nearshore areas (
En ligne :	https://doi.org/10.1007/s10336-018-1565-9

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...