Table of Contents
What is intersexual coevolution?
Abstract. Genital coevolution is a pervasive phenomenon as changes in one sex tend to impose fitness consequences on the other, generating sexual conflict. Sexual conflict is often thought to cause stronger selection on males due to the Darwin–Bateman’s anisogamy paradigm.
What is run away reaction?
An exothermic reaction can lead to thermal runaway, which begins when the heat produced by the reaction exceeds the heat removed. The surplus heat raises the temperature of the reaction mass, which causes the rate of reaction to increase. This in turn accelerates the rate of heat production.
What is thermal runaway condition and how it can be prevented?
Thermal runaway begins when the heat generated within a battery exceeds the amount of heat that is dissipated to its surroundings. If the cause of excessive heat creation is not remedied, the condition will worsen.
What is intersexual conflict?
The most parsimonious explanation for these results is that length of guarding is determined via intersexual conflict, in which males and hermaphrodites struggle to shift guarding time to their own optima, rather than a cooperative pairing between the sexes in which the pair follows the male’s optimal strategy.
What is the source of intersexual conflict?
The conflict occurs as the spread of an allele at one locus in either male or female that lowers the fitness of the other sex. This gives rise to different selection pressure on males and females.
Can a human be in heat?
While humans can mate all year long, other female mammals have an estrous cycle. This is when they’re “in heat.” Changes in the animal’s physiology and behavior occur. It only happens once a year. But a woman’s sex drive can be active at any time of year.
What is the runaway hypothesis in evolutionary psychology?
…theory, sometimes called the “runaway hypothesis,” is that perceptual preferences of the choosers, for certain characteristics unrelated to genetic quality in prospective mates, can drive the evolutionary exaggeration of those characteristics to greater and greater extremes.
What is Fisher’s runaway selection hypothesis?
Runaway selection hypothesis, in biology, an explanation first proposed by English statistician R.A. Fisher in the 1930s to account for the rapid evolution of specific physical traits in male animals of certain species. Some traits—such as prominent plumage, elaborate courtship behaviours, or
What is Fisherian runaway theory?
Fisherian runaway. Fisherian runaway or runaway selection is a sexual selection mechanism proposed by the mathematical biologist Ronald Fisher in the early 20th century, to account for the evolution of exaggerated male ornamentation by persistent, directional female choice.
What is the outcome of the runaway process?
Our model shows that there are two general outcomes of the runaway process. The first is the evolution of a stable equilibrium (see Eq. 3). At equilibrium, the degree of exaggeration in female preference is determined by the costs of choice (searching for a mate, predation risks, etc.) and benefits of choice (mating with an attractive male).