Size at first reproduction of Daphnia magna in the kairomone experiment. A: D. magna was grown either in water exposed to Leucaspius delineatus (sunbleak, 'Vertebrate predator') or in water without kairomone (control 1), or B: either in water exposed to larvae of Chaoborus flavicans ('Invertebrate predator') or in the respective kairomone-free water (control 2). Depicted is the size at first reproduction (n = 3, ± SD). Letters indicate a significant difference (p < 0.001) between treatments.
Schwarzenberger et al. BMC Genomics 2009 10:527 doi:10.1186/1471-2164-10-527