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Sperm competition in birds : evolutionary causes and consequences
Birds as vehicles for sperm competition avian mating systems and sperm competition male and female reproductive systems and the fertile period sperm precedence and mechanisms of sperm competition…
The genome of a songbird
This work shows that song behaviour engages gene regulatory networks in the zebra finch brain, altering the expression of long non-coding RNAs, microRNAs, transcription factors and their targets and shows evidence for rapid molecular evolution in the songbird lineage of genes that are regulated during song experience.
Carotenoid Modulation of Immune Function and Sexual Attractiveness in Zebra Finches
It is shown that manipulation of dietary carotenoid supply invokes parallel changes in cell-mediated immune function and sexual attractiveness in male zebra finches (Taeniopygia guttata).
Sperm morphological diversity
Sperm competition and sexual selection
Sperm competition in birds.
- T. Birkhead
- BiologyTrends in Ecology & Evolution
- 1 September 1987
The magpies : the ecology and behaviour of balck-billed and yellow-billed magpies
- T. Birkhead
- Environmental Science
The author has studied both species of magpie in Europe and the United States, and provides, in this text, an account of their ecology and behaviour.
Why do Females Make it so Difficult for Males to Fertilize their Eggs
If females have evolved more and more effective barriers to sperm in their reproductive tract as means of mate choice, coevolution between female anti-sperm responses and male abilities to overcome these will result in increasingly elaborate forms of female hostility towards sperm.
THE EVOLUTION OF SPERM SIZE IN BIRDS
- J. Briskie, R. Montgomerie, T. Birkhead
- BiologyEvolution; international journal of organic…
- 1 June 1997
It is suggested that future models of sperm‐size evolution consider not only the role of sperm competition, but also how female control and manipulation of ejaculates after insemination selects for different sperm morphologies.
Genetic effects on sperm design in the zebra finch
An extraordinary degree of inter-male variation in sperm design that is independent of sperm swimming velocity is shown in the zebra finch Taeniopygia guttata, having important implications for the evolution of sperm in other taxa.