| Titre : | Ornis Fennica 92(4) - 2015 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Andrzej Gorski, Auteur ;
Jacek J. Nowakowski, Auteur ;
Jerzy Bańbura, Auteur
Life-history theory predicts that allocation of resources into offspring size and number should be traded-off. The trade-off may be masked in good environmental conditions and be expressed only in some reproductive attempts, when conditions are [...]
Article
Krzysztof Dudzik, Auteur ;
Radoslaw Wlodarczyk, Auteur ;
Stanislaw Czyz, Auteur ;
Michal Polakowski, Auteur
The migratory behaviour of a subpopulation of Whooper Swans breeding in highlands of southern Poland was studied over a 17-year period, from 1997 to 2013. Birds ringed in their breeding area spent winters and moulting periods in the vicinity of [...]
Article
Sara Fraixedas, Auteur ;
Andreas Linden, Auteur ;
Aleksi Lehikoinen, Auteur
In Finland, modern forestry has caused the gross modification of native forest habitats and a loss of biological diversity due to intensive management regimes. Although less than 1% of the old-growth forest area remains in southern Finland, the [...]
Article
Robin J. Kubitza, Auteur ;
Jukka Suhonen, Auteur ;
Timo Vuorisalo, Auteur
Establishment of dominance hierarchies has been proposed as a mechanism that stabilizes and maintains social groups by reducing physical intra-group conflicts. However, the exact behavioural processes involved in hierarchy formation within natur[...]
Article
Estimating sex specific apparent survival and dispersal of Little Ringed Plovers (Charadrius dubius)
Veli-Matti Pakanen, Auteur ;
Satu Lampila, Auteur ;
Heikki Arppe, Auteur ;
Jari Valkama, Auteur
Sex differences in survival have consequences to population dynamics making information on sex specific survival important. In birds, females often have lower survival than males, and one of the main mechanisms is considered to be differential r[...]
