A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Female breeding dispersal to higher quality habitats in a philopatric top predator
Tekijät: Otterbeck Andreas, Lindén Andreas, Gunko Ruslan, Ylinen Eeva, Byholm Patrik
Kustantaja: SPRINGER HEIDELBERG
Julkaisuvuosi: 2022
Journal: Journal of Ornithology
Tietokannassa oleva lehden nimi: JOURNAL OF ORNITHOLOGY
Lehden akronyymi: J ORNITHOL
Vuosikerta: 163
Numero: 1
Aloitussivu: 83
Lopetussivu: 92
Sivujen määrä: 10
ISSN: 2193-7192
eISSN: 2193-7206
DOI: https://doi.org/10.1007/s10336-021-01943-4
Verkko-osoite: https://link.springer.com/article/10.1007%2Fs10336-021-01943-4
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/68217487
Philopatry and monogamy are conventionally viewed as strategies for improving fitness. Many philopatric and monogamous species have, however, been shown to perform breeding dispersal-an exchange of territory (and often also partner) between two breeding seasons. The adaptiveness of breeding dispersal remains controversial, as data remain scarce and sporadic. For the Northern Goshawk, a typically highly philopatric and monogamous forest raptor, pairs breeding in barren forest landscapes produce fewer fledglings than pairs breeding in more productive landscapes. Using data on Finnish breeding female Goshawks (Accipiter gentilis) during 1999-2016, we tested the hypotheses that: (1) breeding dispersal is more likely at barren territories, (2) dispersing females move to less barren territories, and (3) breeding dispersal improves the survival of young. About 29% of the female Goshawks in our study performed breeding dispersal, which contrasts to philopatry and suggest that site and partner fidelities show large variation within the species' breeding range. We found no evidence that territorial landscape barrenness (proxy on habitat quality) affects the probability of breeding dispersal. However, females that dispersed upgraded to less barren territories. Nevertheless, there were no subsequent effects of breeding dispersal on reproductive performance, suggesting no obvious difference in the capability of rearing young at either site. Although dispersal events were directed to less barren habitats, we suggest that female dispersal is not driven by the pursue for more prospersous habitats, rather that those females are forced to move, for whatever reason. In addition to other observed reasons such as female-female competition for mates and loss of the original mate, intense logging of mature forests lowering local food availability and restricting nest site availability were likely a partial cause of increased breeding dispersal.
Ladattava julkaisu This is an electronic reprint of the original article. |