trait in a female bird Condition - and parasite - dependent expression of a male - like
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منابع مشابه
Condition- and parasite-dependent expression of a male-like trait in a female bird.
In many species, females display brightly coloured and elaborate traits similar to those that males use in intra- and inter-sexual selection processes. These female characters are sometimes related to fitness, and might function as secondary sexual characteristics that have evolved through sexual selection. Here, we used descriptive data from 674 females in 10 populations and an experimental re...
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Although a negative covariance between parasite load and sexually selected trait expression is a requirement of few sexual selection models, such a covariance may be a general result of life-history allocation trade-offs. If both allocation to sexually selected traits and to somatic maintenance (immunocompetence) are condition dependent, then in populations where individuals vary in condition, ...
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Objectives. The purpose of the study was to examine possible correlations and differences of personality and trait anxiety between male and female volleyball players. Methods. The sample consisted of 79 Division A & C volleyball athletes (35 men and 44 women). Personality factors were investigated with the use of IPIP (International Personality Item Pool), whereas for trait anxiety the STAI - ...
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Female and male reproductive tracts are of interest sites to study of immune system because they encounter specific infections such as those are sexually transmitted. Furthermore, female reproductive tract is in close contact with allogenic sperms and transmitted microorganisms during intercourse and semi allogenic fetus during pregnancy. In mammals, there are two types of immune responses, the...
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Objective(s): The protozoan Toxoplasma gondii as an intracellular protozoan is widely prevalent in humans and animals. Infection generally occurs through consuming food contaminated with oocysts and tissue cysts from undercooked meat. The parasite is carried in sexual fluids like semen but there is little information about the effect of T. gondii on the male reproducti...
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