Browsing NINA Brage by Author "Rudolfsen, Geir"
Now showing items 1-3 of 3
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Extra-pair paternity and sperm length variation in a far northern Great Tit (Parus major) population
Kleven, Oddmund; Østnes, Jan Eivind; Rudolfsen, Geir; Schindler, Sonja; Schmoll, Tim (Peer reviewed; Journal article, 2024)Extra-pair paternity is common among socially monogamous bird species and considered an important driver of post-copulatory sexual selection on ejaculate traits including sperm traits. Patterns of extra-pair paternity and ... -
Extra-pair paternity in the boreal, socially monogamous Grey-headed Chickadee (Poecile cinctus)
Kleven, Oddmund; Rudolfsen, Geir; Schmoll, Tim (Peer reviewed; Journal article, 2020)Extra-pair mating is common alternative reproductive strategyamong socially monogamous bird species, but empirical data on the genetic mating systems of most species are still lacking. Here we present the first parentage ... -
Sperm velocity in a promiscuous bird across experimental media of different viscosities
Schmoll, Tim; Rudolfsen, Geir; Schielzeth, Holger; Kleven, Oddmund (Peer reviewed; Journal article, 2020)In species with internal fertilization, the female genital tract appears challenging to sperm, possibly resulting from selection on for example ovarian fluid to control sperm behaviour and, ultimately, fertilization. Few ...