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The word "semelparity" was coined by evolutionary biologist Lamont Cole, [4] and comes from the Latin semel ('once, a single time') and pario ('to beget'). This differs from iteroparity in that iteroparous species are able to have multiple reproductive cycles and therefore can mate more than once in their lifetime.
Monogamy as a mating system in animals has been thought to lower levels of some pre and post copulatory competition methods. [15] [17] [24] Because of this reduction in competition in some instances the regulation of certain morphological characteristics may be lowered. This would result in a vast variety of morphological and physiological ...
Monogyny is one of several mating systems observed in nature, in which a male mates only once; females, however, may mate with multiple males. It is important to emphasize the distinctions between monogyny and polyandry, and monogyny and monogamy. Polyandry is a mating system by which a female mates with more than one male; the male, in turn ...
This is sometimes stated as "animals mate only for reproduction". This view is considered a misconception by some scholars. [55] [56] Jonathan Balcombe argues that the prevalence of non-reproductive sexual behaviour in certain species suggests that sexual stimulation is pleasurable.
Additionally, if a eusocial-insect colony has only one queen, and she has only mated once, then the relatedness between workers (diploid females) in a hive or nest is 3 ⁄ 4. This means the workers in such monogamous single-queen colonies are significantly more closely related than in other sex determination systems where the relatedness of ...
The Javan rhino (Rhinoceros sondaicus) once roamed across many countries in Southeast Asia. Around 2,000 years ago, they were still common in many parts of China. Around 12,000 years ago, they ...
A boa constrictor in the U.K. gave birth to 14 babies — without a mate. The process is called parthenogenesis, from the Greek words for “virgin” and “birth.”
Some wasps, crustaceans and lizards reproduce only through parthenogenesis. But in other species it's rare and usually only observed in captivity. Scientists have a good idea how it happens, though they aren't clear why it happens, according to Kady Lyons, a research scientist at the Georgia Aquarium in Atlanta.