Marbled Crayfish Or “Marmorkrebs” Procambarus Sp

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Marbled Crayfish or “Marmorkrebs” Procambarus sp. Identification Marmorkrebs reproduce asexually via parthenogenesis, meaning only females are needed to reproduce. Thus, all individuals are female and genetically identical. Usually brown in color, some are blue or a mixture of brown, blue and reddish colors. Why is it a Because marmorkrebs Problem? reproduce asexually, only one individual is necessary to establish a population. Their Want to know more? Check out quick reproductive rate, www.dnr.maryland.gov for more on widespread distribution in the invasive species in Maryland and North American pet trade, and what you can do about it. ability to survive fairly low temperatures makes marmorkrebs a potential pest species. Range/Habitat Origin unknown, but discovered in natural ecosystems in Germany, Italy, the Netherlands, and Madagascar. Similar Species Although found in Europe, Method of Discovered in the aquaria of fish species belongs to the Introduction hobbyists in Germany in the late American Cambaridae 1990s. Individuals recently family. found in the wild in Europe and Madagascar were most likely Legal Status MD prohibits the import, aquarium discards. transport, purchase, possession, propagation, sale, Control and Never release live, unused bait and/or release of marbled Prevention or unwanted pets. Educate crayfish in State waters. others about the problems of bait bucket introductions and invasive species. Sources: http://marmorkrebs.org/ R. Seitz, K. Vilpoux, U. Hopp, S. Harzsch & G. Maier (2005). "Ontogeny of the Marmorkrebs (marbled crayfish): a parthenogenetic crayfish with unknown origin and phylogenetic position". Journal of Experimental Zoology A 303 (5): 393–405. G. Scholtz, A. Braband, L. Tolley, A. Reimann, B. Mittmann, C. Lukhaup, F. Steuerwald & G. Vogt (2003). "Parthenogenesis in an outsider crayfish". Nature 6925: 806-806. http://mdc.mo.gov/about-us/get-know-us/organization-structure/conservation-commission/meetings-and- minutes/2010-meeti-1 .

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