Kiinnostava artikkeli marmoriravuista Naturessa
Valvoja: Moderaattorit
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arasila
- Member
- Viestit: 415
- Liittynyt: 10:11, 29.04.2004
- Akvaarioseurat: Ciklidistit, HAS
- Paikkakunta: Helsinki
- Viesti:
Outoa -- minulla toimii. Ehkä yliopiston koneilta on maksettu käyttöoikeus ko. lehden sähköiseen versioon. Pahoittelen sotkua.aqua2002 kirjoitti:No, ei hirveästi hyödytä:
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Jokatapauksessa tässä lyhennelmä;
artikkelissa puhutaan pohditaan marmorirapujen lisääntymistä ja lajimääritystä. Lisäksi artikkelissa todetaan, että laji on kotoisin Amerikasta ja on luultavasti muoto Floridassa esiintyvästä Procambarus fallaxista.
Abstrakti:
It has been rumoured1 that an unidentified decapod crustacean, a crayfish of marbled appearance and of uncertain geographical origin that was introduced into the German aquarium trade in the mid-1990s, is capable of unisexual reproduction (parthenogenesis). Here we confirm that this marbled crayfish ('Marmorkrebs') is parthenogenetic under laboratory conditions and use morphological and molecular analysis to show that it belongs to the American Cambaridae family. Although parthenogenesis is widespread among the Crustacea2, and shrimp, lobsters, crayfish and crabs are otherwise versatile in their modes of reproduction3-5, it has not been reported before in decapods, the largest and economically most important crustacean group. By virtue of its parthenogenetic reproduction, the marbled crayfish emerges not only as an interesting laboratory model but also as a potential ecological threat in that it could outcompete native forms should even a single specimen be released into European lakes and rivers.
