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Zur Spermienspeicherung Bei Armadillidien (Isopoda Terrestria)

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image of Crustaceana

Most females of the terrestrial isopod species Armadillidium vulgare and A. nasatum, which have mated once, store functional sperms until they die, thus assuring a normal number of broods without additional matings. Using colour genes (sex-realisators) it could be demonstrated that, in Armadillidium peraccae and A. nasatum, offspring of females that had been mated a second time, after an interval of some months to about one year, usually include descendants of the second male; often these predominate, and sometimes none from the first male are present. Hence, in spite of the potential long life-span of the spermatozoa, it is possible to obtain progeny of at least two males from one female. But it is essential to be able to distinguish the descendants of the males used for experimental purposes, since each brood may have offspring from both of them.

Affiliations: 1: Zoologisches Staatsinstitut und Zoologisches Museum, Hamburg, Deutschland


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