Testosterone increases activity but not daily energy expenditure in captive male dark-eyed juncos, 'Junco hyemalis'
Article Abstract:
An investigation is conducted into the testosterone levels in male dark-eyed juncos, which have been observed to peak at an early stage in the breeding season and then decline. The study extends the early peak level throughout the season and evaluates the related expenditure of energy.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 2000
User Contributions:
Comment about this article or add new information about this topic:
Female ornamentation and male mate choice in dark-eyed juncos
Article Abstract:
An experiment concerning female ornamentation and male mate choice was performed in dark-eyed junco, Junco hyemalis. It was found that the sexes apparently prefer different trait values, which suggests that preferences are expressed independently in males and females.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 2004
User Contributions:
Comment about this article or add new information about this topic:
Testosterone and mate choice in the dark-eyed junco
Article Abstract:
Variation in testosterone can have an impact on the attractiveness of male dark-eyed juncos to females, and thus affect male copulatory success. It appears that testosterone has the potential to determine all aspects of reproductive behaviour in male dark-eyed juncos. It is possible that testosterone is used by males to adapt their breeding behaviours to align with their status at any one time. Testosterone seems to be particularly important in allowing males to fight with other males for territory.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Effects of testosterone on use of space by male dark-eyed juncos when their mates are fertile. Extraterritorial forays and male parental care in hooded warblers
- Abstracts: Parasites influence social rank and morphology, but not mate choice, in female red junglefowl, Gallus gallus. The effects of age and previous experience on social rank in female red junglefowl, Gallus gallus spadiceus
- Abstracts: Relation to solar activity of intense aurorae in sunlight and darkness. An auroral signature decoded
- Abstracts: Validation tests of a spatially explicit habitat effectiveness model for Rocky Mountain elk. Elk and hunter space-use sharing in South Dakota
- Abstracts: Positioning of follicular dendritic cells within the spleen controls prion. Binding of disease-associated prion protein to plasminogen