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Documents disponibles écrits par cet auteur (6)
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Article
Hannu Poysa, Auteur ; Pentti Linkola, Auteur ; Antti Paasivaara, AuteurSex ratio variation has important consequences for population dynamics and viability. Adult sex ratio is male biased in many duck species, and data from wintering areas suggest male bias has been increasing in some European duck species. However[...]
Article
Hannu Poysa, Auteur ; Robert G. Clark, Auteur ; Antti Paasivaara, Auteur ; Pentti Runko, AuteurEnvironmental conditions experienced early in life may have long-term impacts on life history traits and reproductive performance. We investigated whether ambient temperature experienced during the first two to four weeks of life and weather sev[...]
Article
Antti Paasivaara, Auteur ; Jarkko Rutila, Auteur ; Hannu Poysa, Auteur ; Pentti Runko, AuteurConspecific brood parasitism (CBP) is an important alternative breeding strategy for gaining reproductive output in birds. While interactions between hosts and parasites and consequences of CBP to breeding success of both parties have been studi[...]
Article
Robert G. Clark, Auteur ; Hannu Poysa, Auteur ; Pentti Runko, Auteur ; Antti Paasivaara, AuteurUnderstanding how organisms adjust breeding dates to exploit resources that affect fitness can provide insights into impacts of climate change on avian demography. For instance, mismatches have been reported in long-distance migrant bird species[...]
Article
Antti Paasivaara, Auteur ; Hannu Poysa, AuteurThe survival of common goldeneye Bucephala clangula ducklings during their first week of life was studied in relation to hatching date, brood size, female condition, and weather (temperature and precipitation) during the first week post-hatch by[...]
Article
Petri Nummi, Auteur ; Antti Paasivaara, Auteur ; Sari Suhonen, Auteur ; Hannu Poysa, AuteurHabitat use by birds may be related to single or interacting effects of habitat characteristics, food resources and predators, but little is known about factors affecting habitat use by wetland species in boreal ecosystems. We surveyed brood-rea[...]
