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Browsing by Author "Hill, Geoffrey"
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Understanding Ornamental Carotenoid Metabolism in the House Finch (Haemorhous mexicanus)
Ge, Zhiyuan (2018-07-18)
Carotenoids are the most common source of yellow, orange and red coloration in birds. However, like other vertebrates, birds cannot synthesize carotenoids de novo. To produce carotenoid-based coloration they must ingest ...
The Use of Ultrasound for Communication by the Big Brown Bat (Eptesicus fuscus)
Grilliot, Matthew (2007-08-15)
Communication signals are important regulators of mating behavior in many animals. Various pre- and post-copulatory mechanisms have been suggested to play a role in the reproductive success and mating strategies of many ...
What do we really know about oxidative stress? Facing the problems with current oxidative stress studies in passerine birds.
Santos, Alexandra (2017-07-27)
Oxidative stress occurs in organisms when there are not enough antioxidants to satiate reactive oxygen species formed during oxidative phosphorylation within the mitochondria. The excess in reactive oxygen species can cause ...
Yolk androgen deposition in two passerine species: Do females play favorites?
Navara, Kristen (2005-12-15)
Eggs of oviparous species contain variable amounts of androgens, such as testosterone (T), dihydrotestosterone (DHT), and androstenedione (A4). Previous studies in birds show that yolk androgens of maternal origin have ...