Produção Nacional
A formação dos oostegitos em Porcellio dilatatus Brandt (Crustácea, Isopoda, Oniscidea) em laboratório
1999; Sociedade Brasileira de Zoologia; Volume: 16; Issue: suppl 1 Linguagem: Inglês
10.1590/s0101-81751999000500021
ISSN1806-969X
AutoresJayme de Loyola e Silva, Maria Aparecida Sídor Coraiola,
Tópico(s)Marine Biology and Ecology Research
ResumoFormation or oostegites in Porcellio dilatatus Brandt (Crustacea, Isopoda, Oniscidea) in laboratory.Woodlice were reared in laboratOlY in the enviconmental c\imate of the city of Curitiba, Brazil, with the purpose of getting to know the pcocess of fOlmation of oostegites.Two kinds of cultivation were adopted: natural populations to be contcolled were kept in small glass aquariums resembling the natural enviconrnent; and, new-bom woodlice were raised each one isolated in small plastic receptac\es, with a special diet until two years old or over.When adults, after recognizing their sexes, males and females were put together to copulate during one oe more days, and some of the females were fertilized.After 30 days, the fertilized females realized ecdise and acquired oostegites.The complete pcocess (copulation, fecundation, incubation and birth) occurred between 25 and 50 days.The females fertilized only once produced one or more bcoods, each bcood varying fcom 10 to 30 youngs.The spermatic mass reserved in the seminal receptacle depleted after having realized one, two 01', rarely, three broods; the íemales without sperm in the receptac\e realized ecdise, lost oostegites and got again virginal aspect.F emales in such condition, kept alone, isolated fcom males have never acquire oostegites again.Otherwise, in contact with males, once fertilized they realized ecdise and acquired new oostegites.The authors have concluded that the oostegites only are formed because ofthe received sperm and its continuity depends on the sperm accumulated in the seminal receptacIe, for more than one brood.
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