| Titre : | Journal of Animal Ecology 78(3) - MAY 2009 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Michael Schaub, Auteur ;
Johann von Hirschheydt, Auteur
Theoretical models predict a negative effect of current reproduction on breeding dispersal, survival and future reproduction, and many studies confirm these predictions. Yet, results of most previous studies may be difficult to interpret because[...]
Article
Tanya M. Latty, Auteur ;
Mary L. Reid, Auteur
In group-living organisms, individuals that initiate aggregations, termed pioneers, may suffer higher mortality costs than individuals that join established aggregations. Here we examine the hypothesis that aggregation initiators achieve higher [...]
Article
Julien Gasparini, Auteur ;
Pierre Bize, Auteur ;
ROMAIN PIAULT, Auteur ;
Kazumasa Wakamatsu, Auteur ;
Jonathan D. Blount, Auteur ;
Anne-Lyse Ducrest, Auteur ;
Alexandre Roulin, Auteur
Melanin pigments provide the most widespread source of coloration in vertebrates, but the adaptive function of such traits remains poorly known. In a wild population of tawny owls (Strix aluco), we investigated the relationships between plumage [...]
Article
Uri Grodzinski, Auteur ;
Orr Spiegel, Auteur ;
Carmi Korine, Auteur ;
Marc W. Holderied, Auteur
Understanding the causes and consequences of animal flight speed has long been a challenge in biology. Aerodynamic theory is used to predict the most economical flight speeds, minimizing energy expenditure either per distance (maximal range spee[...]
Article
Rolf Rodven, Auteur ;
Inkeri Mannikko, Auteur ;
Rolf A. Ims, Auteur ;
Nigel G. Yoccoz, Auteur ;
Ivar Folstad, Auteur
In reindeer, the variation in fur coloration is higher in semi-domesticated than in wild populations. This difference might result from impacts of natural enemies acting on conspicuously coloured individuals with higher intensity in natural than[...]
Article
Carey E. Kuhn, Auteur ;
Daniel E. Crocker, Auteur ;
Yann Tremblay, Auteur ;
Daniel P. Costa, Auteur
The at-sea behaviour of marine predators is often described based on changes in behavioural states, such as transit, searching, and feeding. However, to distinguish between these behaviours, it is necessary to know the actual functions of the be[...]
Article
Daniel R. MacNulty, Auteur ;
Douglas W. Smith, Auteur ;
L. David Mech, Auteur ;
Lynn E. Eberly, Auteur
Large body size hinders locomotor performance in ways that may lead to trade-offs in predator foraging ability that limit the net predatory benefit of larger size. For example, size-related improvements in handling prey may come at the expense o[...]
