Competitive males have higher quality sperm in a monogamous social bee
نویسندگان
چکیده
منابع مشابه
Expensive Egos: Narcissistic Males Have Higher Cortisol
BACKGROUND Narcissism is characterized by grandiosity, low empathy, and entitlement. There has been limited research regarding the hormonal correlates of narcissism, despite the potential health implications. This study examined the role of participant narcissism and sex on basal cortisol concentrations in an undergraduate population. METHODS AND FINDINGS Participants were 106 undergraduate s...
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in male reproductive success, and thus amplifies pre-copulatory sexual selection [4]. In red flour beetles, for example, male precopulatory attractiveness is positively associated with success during sperm competition [5], and in guppies, more ornamented males sire more offspring when the sperm of two males are artificially inseminated in equal numbers [6]. Male mating advantage more generally ...
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The evolution of polyandry remains controversial. This is because, unlike males, in many cases multiple mating by females does not increase fecundity and inevitably involves some costs. As a result, a large number of indirect benefit models have been proposed to explain polyandry. One of these, the good sperm hypothesis, posits that high-quality males are better sperm competitors and sire highe...
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When females copulate with multiple males the potential exists for female sperm choice. Females may increase the probability of being fertilized by preferred males by selectively retaining their sperm while ejecting the sperm of unfavoured males. An alternative criterion to male quality for female sperm choice may be sperm age because old sperm degrade and can lead to zygote death or unhealthy ...
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Health[1] Health[1]Men's health [2]Norway [3]Forskning.no [4] There is a link between obesity and poor sperm quality. New research shows that fatty acids such as Omega3 may be an important explanation. Considering the fact that more and more people struggle with overweight and obesity, both in Norway and internationally, there is cause for concern, according to the researcher behind the study J...
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ژورنال
عنوان ژورنال: BMC Evolutionary Biology
سال: 2016
ISSN: 1471-2148
DOI: 10.1186/s12862-016-0765-2