636 results on '"Lifjeld, Jan T."'
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2. Demographic reconstruction from ancient DNA supports rapid extinction of the great auk.
3. Do female bluethroats without extra-pair offspring have more MHC-compatible social mates?
4. Correction to: When Older Males Sire More Offspring—Increased Attractiveness or Higher Fertility?
5. When Older Males Sire More Offspring—Increased Attractiveness or Higher Fertility?
6. Impact of Z chromosome inversions on gene expression in testis and liver tissues in the zebra finch
7. Multiple Genetic Benefits of Female Promiscuity in a Socially Monogamous Passerine
8. Measuring sperm swimming performance in birds: effects of dilution, suspension medium, mechanical agitation, and sperm number
9. Egg Mass Influences Nestling Quality in Tree Swallows, but There Is No Differential Allocation in Relation to Laying Order or Sex
10. No Evidence of Extra-Pair Paternity in the Little Auk Alle alle
11. Rapid sperm length divergence in a polygynandrous passerine: a mechanism of cryptic speciation?
12. Ecological Constraints on Extra-Pair Paternity in the Bluethroat
13. Mate Choice and Imprinting in Birds Studied by Cross-Fostering in the Wild
14. Short-Term Fluctuations in Cellular Immunity of Tree Swallows Feeding Nestlings
15. Male Characteristics and Fertilisation Success in Bluethroats
16. Extra-Pair Paternity in the Common Murre
17. Molecular Evidence for Extrapair Paternity and Female-Female Pairs in Antarctic Petrels
18. Variation in the Frequency of Extra-Pair Paternity in Birds: A Comparison of an Island and a Mainland Population of Blue Tits
19. Variation in the Number of Spermatozoa in Blue Tit and Great Tit Eggs
20. Female Plumage Coloration in the Bluethroat: No Evidence for an Indicator of Maternal Quality
21. Sexual Conflict over Fertilizations: Female Bluethroats Escape Male Paternity Guards
22. Ultraviolet Plumage Ornamentation Affects Social Mate Choice and Sperm Competition in Bluethroats (Aves: Luscinia s. svecica): A Field Experiment
23. High Paternity without Paternity-Assurance Behavior in the Purple Sandpiper, a Species with High Paternal Investment
24. High Frequency of Extra-Pair Paternity in a Dense and Synchronous Population of Willow Warblers Phylloscopus trochilus
25. Brood Division Is Associated with Fledgling Dispersion in the Bluethroat (Luscinia s. svecica)
26. Incomplete Female Knowledge of Male Quality May Explain Variation in Extra-Pair Paternity in Birds
27. A Sexually Selected Paradox in the Pied Flycatcher: Attractive Males Are Cuckolded
28. Evolution of female promiscuity in Passerides songbirds
29. Postcopulatory sexual selection is associated with accelerated evolution of sperm morphology
30. Selection on sperm size in response to promiscuity and variation in female sperm storage organs
31. Flagellum tapering and midpiece volume in songbird spermatozoa
32. Testing a post-copulatory pre-zygotic reproductive barrier in a passerine species pair
33. Effects of fixatives and storage duration on avian sperm morphology
34. Experimental manipulation of sexual traits in barn swallow populations—No evidence for divergent sexual selection
35. Female extra-pair copulation for direct fitness benefits: A cautionary note
36. No evidence that sperm morphology predicts paternity success in wild house wrens
37. PROMISCUITY, SEXUAL SELECTION, AND GENETIC DIVERSITY: A REPLY TO SPURGIN
38. Rapid sperm evolution in the bluethroat (Luscinia svecica) subspecies complex
39. FEMALE PROMISCUITY IS POSITIVELY ASSOCIATED WITH NEUTRAL AND SELECTED GENETIC DIVERSITY IN PASSERINE BIRDS
40. Evolution of sperm structure and energetics in passerine birds
41. Sperm competition in tropical versus temperate zone birds
42. Variation in sperm morphometry and sperm competition among barn swallow (Hirundo rustica) populations
43. Ptilotis erythropleura Salvadori 1876
44. Type specimens of birds in the Natural History Museum, University of Oslo, Norway
45. Ptilopus (Leucotreron) alligator Collett 1898
46. Nesospiza wilkinsi subsp. dunnei Hagen 1952
47. Petrophassa rufipennis Collett 1898
48. Ptilopus flavovirescens Meyer, AB 1884
49. Zosterops novae subsp. guineae Salvadori 1878
50. Eclectus riedeli Meyer, AB 1882
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