Jan T. Lifjeld

Females increase offspring heterozygosity and fitness through extra-pair matings

Katharina Foerster, Kaspar Delhey, Arild Johnsen et al. · Nature · 2003 · 538 citations

Breeding Behavior, Fitness, Medicine +10

Female bluethroats enhance offspring immunocompetence through extra-pair copulations

Arild Johnsen, Vegard Andersen, Christine Sunding et al. · Nature · 2000 · 241 citations

Female Bluethroats, Developmental Biology, Fertility +5

Polygyny in Birds: The Role of Competition between Females for Male Parental Care

Tore Slagsvold, Jan T. Lifjeld · The American Naturalist · 1994 · 237 citations

Breeding Behavior, Parental Care, Fitness +17

Extra-pair paternity in monogamous tree swallows

Jan T. Lifjeld, Peter O. Dunn, Raleigh J. Robertson et al. · Animal Behaviour · 1993 · 236 citations

Breeding Behavior, Reproductive Success, Fertility +9

Variation in plumage colour of the Great tit <i>Parus major</i> in relation to habitat, season and food

Tore Slagsvold, Jan T. Lifjeld · Journal of Zoology · 1985 · 190 citations

Biology, Breeding Behavior, Wildlife Ecology +8