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Documents disponibles écrits par cet auteur (12)
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Article
Killu Timm, Auteur ; Marko Magi, Auteur ; Kaisa Telve, Auteur ; Vallo Tilgar, AuteurStudies have provided inconsistent evidence regarding the effects on behaviour of nucleotide polymorphism at the DRD4 gene. For instance, the DRD4 gene affects exploratory behaviour in some bird species and populations but not in others. Our ear[...]
Article
Elo Sisask, Auteur ; Raivo Maend, Auteur ; Marko Maegi, Auteur ; Vallo Tilgar, AuteurCapsule Pied Flycatchers are better able than Great Tits to adjust their feeding behaviour to varying conditions in the same area. Aims Great Tits breeding in a mosaic of deciduous and coniferous forests in the northern temperate region exhibit [...]
Article
Priit Kilgas, Auteur ; Raivo Mand, Auteur ; Vallo Tilgar, Auteur
Article
Vallo Tilgar, Auteur ; Indrek Ots, Auteur ; Raivo Mand, Auteur
Article
Rauno Veeroja, Auteur ; Anne Kirk, Auteur ; Vallo Tilgar, Auteur ; Sander Saede, Auteur ; Merit Kreitsberg, Auteur ; Jueri Tonisson, AuteurP>1. The Trivers-Willard model of optimal sex ratios predicts that in polygynous species mothers in better condition should produce more male than female offspring. However, empirical support for this hypothesis in mammals and especially ungulat[...]
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Kadri Moks, Auteur ; Vallo Tilgar, AuteurIn birds, little is known about how the presence of predators alters parental food distribution decisions among nestlings. We found that experimentally increasing perceived predation risk changed parental care in female but not in male Great Tit[...]
Article
Pauli Saag, Auteur ; Priit Kilgas, Auteur ; Marko Maegi, Auteur ; Vallo Tilgar, Auteur ; Raivo Maend, AuteurPlumage bacteria may play an important role in shaping the life histories of birds. However, to design suitable experiments to examine causal relationships between plumage bacteria and the fitness of host birds, natural variation in plumage bact[...]
Article
Vallo Tilgar, Auteur ; Raivo Mand, Auteur ; Priit Kilgas, Auteur ; Marko Magi, AuteurEnvironmental factors during early development may have profound effects on subsequent life-history traits in many bird species. In wild birds, sex-specific effects of early ontogeny on natal dispersal and future reproduction are not well unders[...]
Article
Raivo Mand, Auteur ; Vallo Tilgar, Auteur ; Priit Kilgas, Auteur ; Marko Magi, AuteurIt has been suggested that a bird's clutch size is not limited by the amount of resources available at the time of laying but that differences in the availability of food for nestlings is the ultimate underlying factor determining spatio-tempora[...]
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Cecilia P. Calabuig, Auteur ; Miguel Ferrer, Auteur ; Roberto Muriel, Auteur ; Vallo Tilgar, AuteurContext. Recent studies have suggested that plasma alkaline phosphatase (ALP) can be used to assess skeletal development as well as health status in wild animals. Aims. However, the information about age-related dynamics of ALP in birds, especia[...]
Article
Priit Kilgas, Auteur ; Pauli Saag, Auteur ; Marko Maegi, Auteur ; Vallo Tilgar, Auteur ; Raivo Maend, AuteurPlumage bacteria may play an important role in shaping the life histories of birds. However, few studies have examined natural patterns of variation in plumage bacteria. We have previously shown that plumage bacterial load is higher during the p[...]
Article
Judith Morales, Auteur ; Suvi Ruuskanen, Auteur ; Toni Laaksonen, Auteur ; Tapio Eeva, Auteur ; Rafael Mateo, Auteur ; Eugen Belskii, Auteur ; Elena V. Ivankina, Auteur ; Antero Järvinen, Auteur ; Anvar Kerimov, Auteur ; Erkki Korpimäki, Auteur ; Indriķis Krams, Auteur ; Raivo Maend, Auteur ; Chiara Morosinotto, Auteur ; Markku Orell, Auteur ; Anna Qvarnstrom, Auteur ; Heli Siitari, Auteur ; Fred M. Slater, Auteur ; Vallo Tilgar, Auteur ; Marcel E. Visser, Auteur ; Wolfgang Winkel, Auteur ; Herwig Zang, Auteur ; Juan Moreno, AuteurThe expression and impact of maternal effects may vary greatly between populations and environments. However, little is known about large-scale geographical patterns of variation in maternal deposition to eggs. In birds, as in other oviparous an[...]
