Heritable true fitness and bright birds: a role for parasites?

  title={Heritable true fitness and bright birds: a role for parasites?},
  author={William D. Hamilton and Marlene Zuk},
  volume={218 4570},
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 protozoa and one nematode) and striking display (three characters: male "brightness," female "brightness," and male song). This result conforms to a model of sexual selection in which (i) coadaptational cycles of host and parasites generate consistently positive offspring-on-parent regression of… 

Effects of predation, parasites, and phylogeny on the evolution of bright coloration in north american male passerines

It is established that phylogeny and predation risk are most strongly associated with variation in male coloration and the role of sexual selection in the development of bright coloration in passerine birds.

Passerine Polygyny: A Role for Parasites?

  • A. Read
  • Biology
    The American Naturalist
  • 1991
It is shown for European and North American passerine birds that the proportion of individuals infected with blood parasites is significantly lower in polygynous species than it is in monogamous species, suggesting that parasitic infection should be considered as a factor influencing passerine mating systems whichever way the causal arrow goes.

Sexual selection and the geography of Plasmodium infection in Savannah sparrows (Passerculus sandwichensis)

According to Hamilton and Zuk's hypothesis of parasite-mediated sexual selection, host-parasite coevolution maintains variation in male genetic quality and allows for strong intersexual selection in

Parasite distribution and virulence: implications for parasite-mediated sexual selection

It is suggested that only a small fraction of host-parasite associations could promote the evolution of host mate choice for resistance based on brightness, and this work shows that because of parasite aggregation on a few hosts, only few breeding males would suffer from reductions in brightness.

Variation in susceptibility to parasite infection: patterns, determinants and consequences in red-fronted lemurs

Analysis of patterns and proximate determinants of gastro-intestinal parasite susceptibility in a wild population of red-fronted lemurs in Kirindy Forest, western Madagascar indicates an immune-enhancing effect of androgen and glucocorticoid levels, leading to a decrease in parasite species richness and nematode infection intensity.

Parasitism and Male Mating Success in Drosophila testacea

Hamilton and Zuk (1982) have expanded the genetic side of this hypothesis: for species in which parasitism and disease have substantial deleterious effects, females should select mates according to their perception of a male's genetic resistance to currently prevalent pathogens, as indicated by his general appearance and vigor.

Do blood parasites affect reproductive performance in male red bishops (Euplectes orix)? A test of the Hamilton-Zuk hypothesis

The data indicate that high stress levels as assessed by the heterophile/lymphocyte ratio might increase parasite susceptibility, but results do not support predictions derived from the Hamilton-Zuk hypothesis of parasite-mediated sexual selection.

Parasites and Sexual Selection: A Macroevolutionary Perspective

The Hamilton-Zuk hypothesis postulates a causal link between parasitism and the evolution of epigamic traits by intersexual selection, which is supported at the microevolutionary level if females show significant preference for lightly or uninfected males, and if intensity of infection reflects host resistance to parasites that depress host fitness by causing disease.

Parasite loads in parthenogenetic and sexual lizards (Heteronotia binoei) : support for the Red Queen hypothesis

It is reported that parthenogenetic individuals of the Heteronotia binoei species complex are much more prone to infection by mites than are their sexual relatives, which accords with a central prediction of the Red Queen hypothesis.



Offspring Quality and the Polygyny Threshold: "The Sexy Son Hypothesis"

An expansion of the Orians-Verner model for the evolution of polygyny has been made to explain evidence contradictory to that model. By separating the individual quality of the male from the quality

Inheritance of immunity in animals.

  • J. Gowen
  • Biology
    Annual review of microbiology
  • 1948
Besides the host genes, the morbid condition may need the intervention of another factor, a bacterium, protozoa, or virus act­ ing on the host to bring about the disease.

Population biology of infectious diseases: Part II

Consideration is given to the relation between the ecology and evolution of the transmission processes and the overall dynamics, and to the mechanisms that can produce cyclic patterns, or multiple stable states, in the levels of infection in the host population.

Social and reproductive correlates of parasite ova emissions by baboons

Information on parasite ova emissions by non-human primates is important for understanding the life-cycle of the parasites and the spread of parasites both within and between social groups and to individuals of other species, including humans and domestic stock.

Further Evidence of Hereditary Resistance and Susceptibility to Cecal Coccidiosis in Chickens

Abstract THE economic impact of disease resistance studies of animals has not rivaled that conducted with plants although numerous investigations concerning the role of inheritance of disease

Beetle Horn Dimorphism: Making the Best of a Bad Lot

This study of the dimorphic horned dynastine beetle Podischnus agenor Oliver shows that the behavior and ecology of minor males differs from that of major males in ways which suggest that the minor form is a facultative adaptation designed to reduce direct competition with major males, and thus to compensate partially for the competitive disadvantage resulting from the minors' smaller size.

Parasitism and behavioral dominance among male mice.

Infestations by the nematode Heligmosomoides polygyrus can prevent adult male mice from becoming behaviorally dominant. The effect is dose-dependent and is more likely to influence the development of

Host-parasite relationships in cestode infections, with emphasis on host resistance.

By necessity, the present discussion of host-parasite relationships is quite incomplete, since the major emphasis will be on host resistance, but there is an added advantage of limiting this discussion for the most part to one host-Parasite combination,since the various relationships are quite involved.

Incidence of blood parasites in birds collected in southwestern Georgia.

The purpose of the work in the Georgia area was to determine the susceptibility of local Anopheles to various malarial parasites in lower animals of the area and to determine if sporozoites were present in wild-caught Anophele in a locality where human malaria had been undetected for longer than in the South Carolina area.

Intermediate host specificity in Schistosoma mansoni.

  • P. Basch
  • Biology
    Experimental parasitology
  • 1976