Local Mate Competition, and Extraordinary and Ordinary Blood Parasite Sex Ratios

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Local Mate Competition, and Extraordinary and Ordinary Blood Parasite Sex Ratios

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Effect of local mate competition on fig wasp sex ratios.

In fig wasps, mating takes place among the offspring of one or a few foundress mothers inside the fig from which mated females disperse to found new broods. Under these conditions, related males will compete with each other for mating and several studies have shown female bias in brood sex ratios as a response to Local Mate Competition (LMC). Studying Pegoscapus tonduzi which pollinates Ficus c...

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Evolution of extraordinary female-biased sex ratios: the optimal schedule of sex ratio in local mate competition.

Female-biased sex ratio in local mate competition has been well studied both theoretically and experimentally. However, some experimental data show more female-biased sex ratios than the theoretical predictions by Hamilton [1967. Science 156, 477-488] and its descendants. Here we consider the following two effects: (1) lethal male-male combat and (2) time-dependent control (or schedule) of sex ...

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Sex proportions of Haemoproteus blood parasites and local mate competition.

Recent genetic evidence suggests that parasitic protozoa often reproduce by "selfing," defined as sexual stages from a single, clonal lineage fertilizing each other. Selfing favors production of an excess of female over male progeny. We tested whether the proportion of male gametocytes of blood parasites of the genus Haemoproteus was affected by variables that could influence the probability of...

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Local mate competition and transmission bottlenecks: a new model for understanding malaria parasite and other sex ratios.

The local mate competition model from sex ratio theory predicts female-biased sex ratios in populations that are highly subdivided during mating, and is thought to accord well with the population structure of malaria parasites. However, the selective advantage of female-biased sex ratios comes from the resulting increase in total reproductive output, an advantage the transmission biology of mal...

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ژورنال

عنوان ژورنال: Oikos

سال: 1998

ISSN: 0030-1299

DOI: 10.2307/3546363