| Titre : | Intra-specific nest parasitism in Black-headed Gull Larus ridibundus |
| Auteurs : | N. Duda, Auteur ; W. Chetnicki, Auteur ; P. Jadwiszczak, Auteur |
| Type de document : | Article |
| Dans : | Ardea (91(1) SPR 2003) |
| Article en page(s) : | 122-124 |
| Résumé : | Intra-specific nest parasitism in Black-headed Gull is reported based on several lines of indirect evidence. The within-clutch egg size asymmetry seems to be a component of protective mechanism against parasitism. Results of our observations and analyses presented in this paper suggest that intra-specific nest parasitism does exist in Black-headed Gulls. The phenomenon seems more common and important than suggested by studies using traditional methods, molecular studies are needed to assess its actual intensity. |



