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Posts tagged “Pieris rapae

Cabbage Whites Mating

Cabbage White butterflies (Pieris rapae) are seemingly common, rather ordinary and unremarkable butterflies.  That is, until you become acquainted more intimately with their reproductive idiosyncracies.  The male’s sperm, along with a nutritious snack, is contained within a package called a spermatophore. It is the size of the spermatophore that defies belief, as it makes up 13 percent of the male’s body weight.  Translated into human terms, a 150 male would possess a 20-pound package of sperm.

The male Cabbage White deposits its spermatophore into a pouch within the female’s reproductive tract and the sperm proceed to swim to a second pouch where they are used to fertilize the female’s eggs.  The female absorbs the nutrients that accompanied the sperm and uses them to make approximately half the eggs she lays.

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