Testosterone and reproductive effort in male primates
نویسندگان
چکیده
منابع مشابه
Variation in testosterone levels and male reproductive effort: insight from a polygynous human population.
Recent evidence suggests that, in humans, variations in testosterone (T) levels between men reflect their differential allocation in mating versus parenting efforts. However, most studies have been conducted in urbanized, monogamous populations, making generalizations from them questionable. This study addresses the question of whether indicators of male reproductive effort are associated with ...
متن کاملPatterns of reproductive effort in male ungulates
In ungulates, males and females have contrasting life histories, as usually only the females raise the young. How reproductive effort in males varies with individual level and population level characteristics has received little attention in the literature. Using published information on direct (weight loss during the rut) and indirect (rutrelated changes in activity budgets, fighting frequency...
متن کاملAge- and density-dependent reproductive effort in male red deer.
Reproductive effort in female ungulates originates from gestation and lactation and has been studied extensively; however, no comparable studies of reproductive effort in males (due to fighting for access to mates) have, to our knowledge, previously been reported. Here, we report on weight loss of male red deer during the annual mating season--a direct measure of male reproductive effort (or so...
متن کاملCortisol but not testosterone is repeatable and varies with reproductive effort in wild red deer stags.
Although it is known that hormone concentrations vary considerably between individuals within a population, how they change across time and how they relate to an individual's reproductive effort remains poorly quantified in wild animals. Using faecal samples collected from wild red deer stags, we examined sources of variation in faecal cortisol and androgen metabolites, and the potential relati...
متن کاملEnergetics and reproductive effort.
Natural selection favors the optimal allocation of energy and other limiting resources to reproduction. Human reproductive physiology displays characteristic patterns that can be viewed as mechanisms that help optimize reproductive effort in the face of environmental energetic constraints. Female ovarian function is particularly sensitive to energy balance and energy flux, resulting in a synchr...
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ژورنال
عنوان ژورنال: Hormones and Behavior
سال: 2017
ISSN: 0018-506X
DOI: 10.1016/j.yhbeh.2016.09.001