Plumage polymorphism in melanin - based coloration : a case study in the tawny owl Strix aluco
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منابع مشابه
Tawny owl (Strix aluco) and Hume's Tawny owl (Strix butleri) are distinct species: evidence from nucleotide sequences of the cytochrome b gene.
The cytochrome b gene of the Tawny Owl (Strix aluco), Hume's Tawny Owl (Strix butleri) and the African wood owl (Strix woodfordii) was amplified by polymerase chain reaction (PCR) and partially sequenced (300 base pairs). Sequences differ substantially (9 to 12% nucleotide substitutions) between these taxa indicating that they represent distinct species, which is also implicated from morphologi...
متن کاملPheomelanin-based coloration and the ability to cope with variation in food supply and parasitism.
Although gene by environment interactions may play a key role in the maintenance of genetic polymorphisms, little is known about the ecological factors involved in these interactions. We investigated whether food supply and parasites can mediate covariation between the degree of adult pheomelanin-based coloration, a heritable trait, and offspring body mass in the tawny owl (Strix aluco). We swa...
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BACKGROUND Despite its importance for reducing wildlife-vehicle collisions, there is still incomplete understanding of factors responsible for high road mortality. In particular, few empirical studies examined the idea that spatial variation in roadkills is influenced by a complex interplay between road-related factors, and species-specific habitat quality and landscape connectivity. METHODOL...
متن کاملThe mucinous layer covering the corneal endothelium in the owl Strix aluco.
ABELSDORFF and Wessely (1909) reported the curious observation made in connexion with other work, that the aqueous humour of certain owls, Strix aluco (Syrnium aluco, Tawny owl), Athene noctua (Little owl), and Asio otus (Otus vulgaris, Long-eared owl), is slimy and highly viscous and easily spun into threads. On acidification with acetic acid, a ropy precipitate is formed. The part of the aque...
متن کاملSex- and melanism-specific variations in the oxidative status of adult tawny owls in response to manipulated reproductive effort.
Oxidative stress, determined by the balance between the production of damaging reactive oxygen species (ROS) and antioxidant defences, is hypothesized to play an important role in shaping the cost of reproduction and life history trade-offs. To test this hypothesis, we manipulated reproductive effort in 94 breeding pairs of tawny owls (Strix aluco) to investigate the sex- and melanism-specific ...
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