(F) Growth differences of five juveniles from dam B that were size-matched in stage 6 and then cultured in an aquarium without shelter. 34 days later, one specimen was in stage 11, one in stage 9 and three were in stage 7. Scale bar, 4 mm.

The facts

A 2008 study popularized by Michael Blastland in his book, ‘The Hidden Half’, shows that genetically identical crayfish (clones) from the same batch and grown in a tightly controlled identical environment vary wildly in size, lifespan, behavior, appearance, growth rate, molting, reproduction, etc. Continue reading →