Sexual Inequalities in Helminth Infections: A Cost of Being a Male?

@article{Poulin1996SexualII,
  title={Sexual Inequalities in Helminth Infections: A Cost of Being a Male?},
  author={Robert Poulin},
  journal={The American Naturalist},
  year={1996},
  volume={147},
  pages={287 - 295}
}
  • R. Poulin
  • Published 1 February 1996
  • Biology
  • The American Naturalist
Parasitism and its evolutionary relationship with host sex have received considerable attention in recent years. The role of parasites in maintaining host sexual reproduction (Hamilton 1980; Lively 1987; Ladle 1992) and in driving host sexual selection (Hamilton and Zuk 1982; Clayton 1991) has been explored theoretically and assessed empirically. One potential link between parasitism and host sex, however, has yet to be examined carefully. There are intrinsic biological differences between host… 
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References

SHOWING 1-10 OF 17 REFERENCES
Parasites, Bright Males, and the Immunocompetence Handicap
TLDR
A phenomenological model is presented, operating on an intraspecific level, which views the cost of secondary sexual development from an endocrinological perspective and proposes a negative-feedback loop between signal intensity and parasite burden by suggesting that testosterone-dependent signal intensity is a plastic response.
Sex versus non-sex versus parasite
TLDR
It is shown that with frequency dependence sufficiently intense such models generate cycles, and that in certain states of cycling sexual species easily obtain higher long-term geometric mean fitness than any competing monotypic asexual species or mixture of such.
Evidence from a New Zealand snail for the maintenance of sex by parasitism
TLDR
Male frequency in Potamopyrgus antipodarum, a dioecious freshwater snail with both sexual and parthenogenetic populations, is examined, finding the results do not-support the view that sex is maintained by a variable physical environment, but they are consistent with the idea thatsex is favoured by selection resulting from host–parasite interactions.
Sublethal Parasites and Host Energy Budgets: Tapeworm Infection in White‐Footed Mice
TLDR
It is found that infection by the tapeworm Hymenolepis citelli caused a 2% drop in dry- matter digestibility in host white-footed mice (Peromyscus leucopus), and no compensation for this decreased digestive efficiency was detected either in amount of food consumed or in mass change.
Parasites and sex: Catching the red queen.
  • R. Ladle
  • Biology
    Trends in ecology & evolution
  • 1992
Regulation of mouse colony abundance by Heligmosomoides polygyrus.
TLDR
A detailed long-term study on the impact of the direct life-cycle nematode Heligmosomoides polygyrus on a breeding population of laboratory mice provides a clear example of the ability of helminths to regulate host abundance.
The roles of ecological and evolutionary influences in providing structure to parasite species assemblages.
TLDR
In this review, the presence of a parasite species, in a sample of host individuals, is considered to be an evolutionary phenomenon, but the parasite's population structure is consideredto be an ecological one.
Heritable true fitness and bright birds: a role for parasites?
Combination of seven surveys of blood parasites in North American passerines reveals weak, highly significant association over species between incidence of chronic blood infections (five genera of
Effects of Plagiorhynchus cylindraceus (Acanthocephala) on the energy metabolism of adult starlings, Sturnus vulgaris.
TLDR
These data indicate that, overall, male and female S. vulgaris respond differently to infection and that intestinal helminths normally thought to be of little or no pathological consequence to the host are factors that should be addressed in future studies regarding animal energetics, ecology, and behaviour.
...
...