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Home Q & A Board Biology-Related Homework Help Environmental and Conservation Biology
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arb1988 arb1988
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11 years ago
Discuss the scorpionfly mating system. Pay particular attention to the potential roles of intersexual and intrasexual selection in scorpionflies.
Source  Ecology: Concepts and Applications
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duddyduddy
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11 years ago
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11 years ago
This becomes more self-explanatory if you understand the difference between the two terms.

INTRA = within
INTER = between

Intrasexual selection is selection within the same sex. For example, some male animals compete against one another, physically, for access to females. So something like big antlers, huge sharp teeth, or similar weaponry that can be used against other males of the species as a means of mating with females is a selective advantage.

Intersexual selection is selection between the two sexes. For example, the bright plumage of a male peacock does not help it physically overcome rival males. But female peacocks tend to prefer male peacocks with bright plumage: a brightly colored male peacock has a selective advantage. It is selection based on one sex of the species preferring some characteristic in the other sex of the species.

In scorpionflies, the rate of egg laying by female scorpionflies is positively correlated with the quality of nuptial offering by male scorpionflies. Also, body size of male scorpionflies is positively correlated with mating success.
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