freak

One triploid crayfish somehow became more,
each generation merging with the next.
Six strands of DNA--not two, or four--
encodes proliferation without sex.
Ballooning populations rarely last
a monoculture's always prone to pop
there's more to dominance than breeding fast;
one virion could decimate the crop.
Darwinian selection's view is long;
it's not enough to multiply, and fight.
Today's hot strategy might turn out wrong;
it's only looking back we'll know what's right.
Parthenogenic rotifers get by,
but sexless arthropods seem poised to die.