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Ouvrage
J. Valkama ; P. Saurola ; A. Lehikoinen ; E. Lehikoinen, Auteur ; M. Piha, Auteur ; P. Sola, Auteur ; W. Velmala, Auteur | [S.l.] : LUOMUS | 2014LUOMUS (FIN) 549p
Ouvrage
LUOMUS (FIN) 549p ill grah cartes distrib
Article
J. Valkama, Auteur ; E. Korpimäki, Auteur ; J. Wiehn, Auteur ; T. Pakkanen, AuteurWe examined inter-clutch egg size variation of Eurasian kestrels Falco tinnunculus in western Finland over a period of 12 years, during which their main prey, Microtus voles. fluctuated in three-year population cycles. Females that bred twice in[...]
Article
J. Valkama, Auteur ; D. Currie, AuteurWe monitored population changes and breeding success of Curlews Numenius arquata in a 18 km(2) arable farmland area in southwestern Finland over a four-year period (1995-1998). During this time, the breeding population decreased from 30 to 23 pa[...]
Article
R. Tome, Auteur ; J. Valkama, AuteurWe studied age structure, seasonal variation in abundance and habitat use in the Barn Owl Tyto alba on a lowland farmland area in central Portugal during 1991-93. Abundance varied markedly throughout the year and followed a similar pattern in di[...]
Article
T. Laaksonen, Auteur ; J. A. Fargallo, Auteur ; E. Korpimäki, Auteur ; S. Lyytinen, Auteur ; J. Valkama, Auteur ; V. Poyri, Auteur1. Offspring sex ratio may be an unpredictable component of life history that might select for behavioural plasticity in parental care. If the parents do not have such plasticity and the two sexes of offspring differ in size, individuals in a br[...]
