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Weekend #Plankton #Factoid
Like many #cladoceran #zooplankton, #Daphnia species usually reproduce by a process known as cyclical #parthenogenesis. This strategy is typically a long period of all-female asexual parthenogenetic reproduction for rapid population growth, but under stressful conditions, is followed by production of males and sexual mating to produce resistant tolerant resting eggs called #ephippia. These eggs can last for centuries in the sediment, and still be able to hatch out!