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Article
M. Bertellotti, Auteur ; P. Yorio, AuteurDans Ardea (88(2) 2000)We studied age-related differences in feeding behaviour and foraging success of Kelp Gulls Larus dominicanus feeding on fishery discards at trawl vessels in northern Patagonia, Argentina. Kelp Gulls consumed fish by direct capture and intraspeci[...]
Article
G. Herrera, Auteur ; G. Punta, Auteur ; P. Yorio, AuteurWe studied the diet of breeding Olrog's Gulls Larus atlanticus during 1994 at two colonies in Golfo San Jorge, Argentina, through the analysis Of 207 regurgitated pellets. The diet at Isla Felipe and Isla Vernaci Sudoeste comprised only a few it[...]
Article
P. Garcia-Borboroglu, Auteur ; P. Yorio, AuteurWe examined microhabitat preferences and their adaptiveness for the kelp gull Larus dominicanus in one of its largest colonies in Patagonia. We quantified 13 habitat variables at 104 and 92 nest-sites and at 70 and
Article
P. Yorio, Auteur ; D. E. Rabano, Auteur ; P. Friedrich, AuteurOlrog's Gull Larus atlanticus is a vulnerable species endemic to the Argentine Atlantic coast. We present information on new breeding colonies, update information on known colonies, and describe habitat and nest site characteristics of Olrog's G[...]
Article
P. Yorio, Auteur ; E. Frere, Auteur ; P. Gandini, Auteur ; W. Conway, AuteurWe present information on the current population status of seabirds that breed along the Patagonian coast obtained between 1993 and 1995. A total of 16 species, including two penguins, one petrel, five cormorants, three gulls, three terns and tw[...]
Article
P. Yorio, Auteur ; E. Frere, Auteur ; P. Gandini, Auteur ; A. Schiavini, AuteurSeabird colonies often constitute valuable tourist attractions. Different species differ in their sensitivity to human disturbance and, although birds may habituate to visitors, inappropriate intrusions at poorly managed sites may result in adve[...]
Article
M. Bertellotti, Auteur ; P. Yorio, Auteur ; G. Blanco, Auteur ; M. Giaccardi, AuteurWe evaluated the magnitude of use of waste tips by Kelp Gulls (Larus dominicanus) nesting at Isla de los Pajaros, a large and growing colony in Patagonia, Argentina, and we assessed the difference in use between tips with urban and fishery waste[...]
Article
M. Bertellotti, Auteur ; P. Yorio, AuteurUtilisation of fishery, waste by Kelp Gulls was studied onboard trawl and longline vessels in Golfo San Matias, Patagonia, Argentina, between November 1996 and May 1997. Individuals of all age-classes were present in all counts and in similar pr[...]
