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Documents disponibles écrits par cet auteur (12)
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Article
Sofía Martin-Sirito, Auteur ; Stella B. Román, Auteur ; Walter S. Svagelj, Auteur ; Franco Bogel, Auteur ; Daniel A. Cardoni, Auteur ; Juan P. Isacch, AuteurOne of the most important aspects of the reproductive ecology of birds is nesting site selection, because it directly influences survival adaptation to environmental conditions. This study investigates the influence of domestic livestock grazing[...]
Article
Agustina Gomez-Laich, Auteur ; Carolina Pantano, Auteur ; Rory P. Wilson, Auteur ; Walter S. Svagelj, Auteur ; Ken Yoda, Auteur ; Richard Gunner, Auteur ; Flavio Quintana, AuteurLeg rings are frequently used to mark aquatic birds in order to identify individuals, and study population dynamics and migration patterns, with the proviso being that the rings should not affect the birds. The effects of tags and rings are of p[...]
Article
Walter S. Svagelj, Auteur ; Agustina Gomez-Laich, Auteur ; María Rita Pérez, Auteur ; Gustavo M. Somoza, Auteur ; Flavio Quintana, AuteurThe environment experienced during development is a key factor determining intraspecific variation in postnatal growth. In sexually size-dimorphic species, the larger sex typically grows at a higher absolute rate and consequently is more sensiti[...]
Article
María Soledad Leonardi, Auteur ; Walter S. Svagelj, Auteur ; Agustina Gómez Laich, Auteur ; Flavio Quintana, AuteurPrevious studies on vertical transmission of lice on terrestrial birds have shown that the intensity of parasitism can vary within broods in relation to the hatching order of chicks. In species where the hatching order has an important effect on[...]
Article
Paula I. Giudici, Auteur ; Flavio Quintana, Auteur ; Walter S. Svagelj, Auteur
Article
Luciana Gallo, Auteur ; Flavio Quintana, Auteur ; Walter S. Svagelj, Auteur ; Marcela Uhart, AuteurAbstract. Plasma biochemistries provide a complementary method for assessing physiological and nutritional status of free-ranging wild birds. Triglycerides, total protein and alkaline phosphatase were determined in 110 free-living Imperial Cormo[...]
Article
Walter S. Svagelj, Auteur ; Flavio Quintana, AuteurAbstract. Cormorants and shags (Phalacrocoracidae) are sexually monomorphic in plumage but dimorphic in size with males larger and heavier than females. Such size dimorphism has been capitalized upon for several species in the family to sex adul[...]
Article
Igor Berkunsky, Auteur ; Luciano N. Segura, Auteur ; Rosana M. Aramburu, Auteur ; Román A. Ruggera, Auteur ; Walter S. Svagelj, Auteur ; Juan C. Reboreda, AuteurIn this study we analyse factors affecting nest survival in Blue-fronted Parrots Amazona aestiva breeding in the Chaco region of northern Argentina. We combined temporal and environmental variables in order to determine which best explain variat[...]
Article
Walter S. Svagelj, Auteur ; Nora Lisnizer, Auteur ; Pablo Garcia Borboroglu, Auteur ; Pablo Yorio, AuteurAlthough several studies have reported basic information about the size of Kelp Gull (Larus dominicanus) eggs, no attention has been paid to the comparison of patterns of intra-clutch variation at different breeding sites. Here, the variation in[...]
Article
Walter S. Svagelj, Auteur ; Gustavo J. Fernández, Auteur ; Myriam E. Mermoz, AuteurNest-site selection and nest defense are strategies for reducing the costs of brood parasitism and nest predation, two selective forces that can influence avian nesting success and fitness. During 2001-2002, we analyzed the effect of nest-site c[...]
Article
Luciano Calderon, Auteur ; Walter S. Svagelj, Auteur ; Flavio Quintana, Auteur ; Stephen C. Lougheed, Auteur ; Pablo L. Tubaro, AuteurIn long-lived birds with significant paternal care contribution, as the case of seabirds, extra-pair paternity (EPP) is an infrequent phenomenon. Intriguingly, and in contrast to the general pattern exhibited by seabirds, EPP rates appear relati[...]
Article
Ginger A. Rebstock, Auteur ; Maria Laura Agueero, Auteur ; P. Dee Boersma, Auteur ; Luis Augusto Ebert, Auteur ; Agustina Gomez Laich, Auteur ; Nora Lisnizer, Auteur ; Walter S. Svagelj, Auteur ; M. Magdalena Trivellini, AuteurDans Ostrich (81(2) 2010)
