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Article
Tapio Solonen, Auteur ; Jonna Karhunen, Auteur ; Jaana Kekkonen, Auteur ; Heikki Kolunen, Auteur ; Hannu Pietiäinen, AuteurIn generalist predators the energy needed for reproduction is derived from various prey categories, the profitability of which may vary according to the biomass or accessibility of the prey items. We examined the relationships between the diet a[...]
Article
Jaana Kekkonen, Auteur ; Ilpo K. Hanski, Auteur ; Henrik Jensen, Auteur ; Risto A. Vaisanen, Auteur ; Jon E. Brommer, AuteurA drastic decline in abundance prompts conservation measures, even though a species may still be common, partly because such a decline may be associated with loss of genetic variability. Longitudinal evidence (i.e. repeated measures across time)[...]
Article
Jaana Kekkonen, Auteur ; Ilpo K. Hanski, Auteur ; Risto A. Vaisanen, Auteur ; Jon E. Brommer, AuteurUrbanization has led to increasing amounts of pollutants which can harm organisms that share our living environment. In Finland, the House Sparrow has declined by two thirds during the last couple of decades. One hypothesis suggested to lead to [...]
Article
Jaana Kekkonen, Auteur ; Henrik Jensen, Auteur ; Jon E. Brommer, AuteurTo understand the biology of organisms it is important to take into account the evolutionary forces that have acted on their constituent populations. Neutral genetic variation is often assumed to reflect variation in quantitative traits under se[...]
Article
Jaana Kekkonen, Auteur ; Heikki Kolunen, Auteur ; Hannu Pietiaeinen, Auteur ; Patrik Karell, Auteur ; Jon E. Brommer, AuteurTawny owl reproduction and offspring sex ratios have been considered to depend on the abundance of small voles. We studied reproductive performance (laying date, clutch and brood size) during 1995-2003 and offspring sex ratios from 1999 to 2003 [...]
