“…Many zooplankton species, such as monogonont rotifers and in particular most cladocerans, can shift from asexual, clonal reproduction to resting eggs produced via sexual reproduction (Innes & Singleton, 2000) in response to environmental cues such as overcrowding (Gilbert, 2003, Schroder & Gilbert, 2004, photoperiod and food effects (Gilbert & Schreiber, 1995;Deng, 1996), maternal control (Alekseev & Lampert, 2001), predator kairomones or feces (Slusarcyzk, 2004;Slusarcyzk & Rygielska, 2004;Slusarcyzk et al, 2005), and the presence of competitors (Johnson & Havel, 2001). This shift to sexual reproduction often represents a bet-hedging strategy (Ellner et al, 1998;Chesson, 2000;Cáceres & Tessier, 2003), allowing individuals to produce dormant offspring that will hatch under favorable conditions.…”