A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
The breeding biology of the Redstart Phoenicurus phoenicurus in a marginal area of Finland
Tekijät: Veistola S, Lehikoinen E, Eeva T, Iso-Iivari L
Kustantaja: BRITISH TRUST ORNITHOLOGY
Julkaisuvuosi: 1996
Journal: Bird Study
Tietokannassa oleva lehden nimi: BIRD STUDY
Lehden akronyymi: BIRD STUDY
Vuosikerta: 43
Aloitussivu: 351
Lopetussivu: 355
Sivujen määrä: 5
ISSN: 0006-3657
DOI: https://doi.org/10.1080/00063659609461028
Tiivistelmä
The breeding biology of the Redstart was studied in its marginal breeding area in northernmost Finland during the years 1982-1994. The mean clutch size was higher than in move southern populations. Losses during the egg and nestling stages were negligible: hatching success (hatchlings per egg) and fledging success (fledglings per hatchling) were 0.91 and 0.89, respectively. Only heavy rainfall decreased nestling survival. Our results show that population size is stable and breeding success is good in this marginal breeding area compared to other breeding grounds. The population size fluctuated in parallel with the vole cycle as expected if small (mammal) predators switch to taking birds when vole numbers are low.
The breeding biology of the Redstart was studied in its marginal breeding area in northernmost Finland during the years 1982-1994. The mean clutch size was higher than in move southern populations. Losses during the egg and nestling stages were negligible: hatching success (hatchlings per egg) and fledging success (fledglings per hatchling) were 0.91 and 0.89, respectively. Only heavy rainfall decreased nestling survival. Our results show that population size is stable and breeding success is good in this marginal breeding area compared to other breeding grounds. The population size fluctuated in parallel with the vole cycle as expected if small (mammal) predators switch to taking birds when vole numbers are low.
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