INVESTIGADORES
YORIO Pablo Martin
artículos
Título:
Preference for covered nest sites and breeding success in kelp gulls Larus dominicanus
Autor/es:
YORIO, P.; BERTELLOTTI, M.; QUINTANA, F.
Revista:
Marine Ornithology
Editorial:
African Seabird Group
Referencias:
Lugar: Ciudad del Cabo; Año: 1995 vol. 25 p. 121 - 128
ISSN:
1018-3337
Resumen:
Kelp Gull Larus
dominicanus preferences for covered nest sites and breeding success as a
function of vegetation cover were quantified at Punta León, Argentina, during
1990 and 1991. Kelp Gulls showed a strong preference for nest sites which were
covered or close to vegetation cover. Hatching success in nests with and
without cover was similar. Similarly, hatchingsuccess and chick survival to
five days of age were similar in nests with live and dead vegetation cover. The
probability of raising at least one chick was higher for pairs in covered
nests. However, even though breeding success was higher for covered than for
exposed nests, differences between categories were significant only during
1990. Breeding success was significantly higher in nests with live cover and in
nests from territories with vegetation cover. Heat stress and distance to cover
appear to be the most important factors implicated in the observed differences.