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- J. Komdeur
Sex allocation is the apportioning of parental resources to male versus female offspring in a sexually reproducing species and theory predicts a number of situations in which individuals should adjust their relative allocation to male and female reproduction.
The evolution of mutual ornamentation
Extreme adaptive modification in sex ratio of the Seychelles warbler's eggs
It is shown that biased hatching sex ratios are caused by biased production and not by differential embryo mortality, and that unhelped breeding pairs on low-quality territories produce 77% sons, whereas unhelping pairs on high- quality territories produce 13% sons.
Importance of habitat saturation and territory quality for evolution of cooperative breeding in the Seychelles warbler
- J. Komdeur
Nature 358, 493-495 (1992) IN this letter dealing with cooperative breeding on the Cousin and Cousine Islands in the Seychelles, in four places in the text Cousin is referred to instead of Cousine.…
Ecological constraints, life history traits and the evolution of cooperative breeding
It is suggested that to identify the key differences between cooperative and noncooperative species, a broad constraints hypothesis that incorporates ecological and life history traits in a single measure of 'turnover of breeding opportunities' may provide the most promising avenue for future comparative studies.
Parentage assignment and extra‐group paternity in a cooperative breeder: the Seychelles warbler (Acrocephalus sechellensis)
- D. Richardson, F. L. Jury, K. Blaakmeer, J. Komdeur, T. Burke
- BiologyMolecular Ecology
- 1 September 2001
Parentage analyses showed that subordinate ‘helper’ females as well as the dominant ‘primary” females laid eggs in communal nests, indicating that the Seychelles warbler has an intermediate level of female reproductive skew, in between the alternative extremes of helper‐at‐the‐nest and joint nesting systems.
Green nesting material has a function in mate attraction in the European starling
Fifty Seychelles warbler (Acrocephalus sechellensis) microsatellite loci polymorphic in Sylviidae species and their cross‐species amplification in other passerine birds
Adult sex ratio variation: implications for breeding system evolution
It is argued that the ASR plays a role of similar importance and urged researchers to study the AsR and the OSR side by side, and pleaded for a dynamic view of breeding system evolution with feedbacks between mating, parenting, OSR and ASR on both ecological and evolutionary time scales.
Adaptive sex allocation in birds: the complexities of linking theory and practice.
It is argued that standard sex allocation models, very helpful in understanding sex allocation of invertebrates, do not sufficiently take the complexities of bird life histories and physiology into account and that experimental field and laboratory studies on sex allocation in birds are scarce.