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Julia P. G. Jones Jeanne R. Rasamy Andrew Harvey Alicia Toon Birgit Oidtmann Michele H. Randrianarison Noromalala Raminosoa Olga R. Ravoahangimalala 《Biological invasions》2009,11(6):1475-1482
In 2007 an unusual crayfish found in food markets in the capital of Madagascar was preliminarily identified as Procambarus ‘Marmorkrebs’: a new world taxa and the only decapod known to reproduce by parthenogenesis. We present information on the
identity, distribution and ecology of this recent invader and attempt to evaluate the threat it poses to Madagascar’s biodiversity
and to livelihoods. The species appears to be currently limited to the area close to Antananarivo, but is being sold alive
on major transport routes. We present molecular evidence of its taxonomic relationships and confirm that the Procambarus present in Madagascar is indeed the parthenogenic taxa. We investigate its reproductive ecology and find Procambarus ‘Marmorkrebs’ to have an extremely high fecundity; more than six times that of the native crayfish Astacoides. The limited evidence we have suggests that this species poses a serious threat to freshwater biodiversity and that it is
likely to damage human livelihoods (through its impact on fishing and possibly rice agriculture). More research is urgently
needed but in the meantime action is needed to reduce the rate of spread before it is too late. 相似文献
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