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What is intersexual selection in animals Intersexual selection and intrasexual selection. Intersexual selection in animals refers to the process of mate choice and competition between individuals of different sexes within a species.
By: James Schadenberg, MJ Pinheiro, Chad Gopaul and Amy Van Asseldonk - ppt download
Male peacocks possess an extraordinarily long and colorful tail, adorned with iridescent eyespots. peahens prefer males with larger, more elaborate, and symmetrical tails, signaling good health and genetic quality. Sexual selection, the process through which individuals compete for mates, primarily takes two forms Intrasexual selection is responsible for the evolution of secondary sexual characteristics in males, such as deer antlers, beetle horns, and large body sizes that give individuals an advantage when fighting off potential competitors
Intersexual selection occurs from interactions between the sexes, involving a mating choice for males or females.
These examples illustrate how intersexual selection drives the development of certain traits In many cases, these traits serve as indicators of quality or fitness, influencing reproductive choices significantly. Sexual selection operates through two primary mechanisms Intrasexual selection and intersexual selection
Each mechanism plays a significant role in shaping the traits that enhance reproductive success. An extreme example of intersexual selection can be found in species where males form leks where multiple males gather to display to females. Sexual selection the selection pressures on males and females to obtain matings is known as sexual selection Sexual selection takes two major forms
Intersexual selection (also known as 'mate choice' or 'female choice') in which males compete with each other to be chosen by females
In sexual selection, intersexual choice shows how female preferences affect mate selection and evolution This is clear in many species where females show selective mating, based on traits that reflect male fitness and compatibility. The evolution and biology of sex 10.3 how does sexual selection work
