It sounds like a movie plot, but it’s the strange-but-true story of the marbled crayfish, whose unusual evolution may suggest a strategy for tackling cancer. ScienceMagArchives
It sounds like a bad monster movie plot: A 10-legged mutant creature that reproduces asexually, escapes from confinement in Germany, and quietly begins a global invasion. Within 2 decades, clones of the voracious animal spread through Europe and Africa, bringing devastation to ecosystems and threatening native species.
from eggs unfertilized by sperm. It has been thought to have arisen when two slough crayfish, imported from Florida for the aquarium trade in Germany, mated. The study also"provides clues about how this genome arose and may help conservationists better track the spread of this invasive species," Shotz says.
More important than the crustacean's origin may be that this clone thrives in a wide variety of freshwater habitats, with different temperatures, salinities, and acidity. Clones are supposed to be at a disadvantage because they lack the genetic variation to adapt to new situations. But,"This paper suggests that an animal species can rapidly invade a large geographical area despite reproducing without sex and being clonal," Danchin says.
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