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Conspecific females and males often follow different development trajectories which leads to sex differences in age at maturity (sexual bimaturism, SBM). Whether SBM is typically selected for per se (direct selection hypothesis) or merely represents a side‐effect of other sex‐related adaptations (indirect selection hypothesis) is, however, still an open question. Substantial interspecific variation...
We studied the acute effects of crude oil on the size-class population structure of the cladoceran Daphnia magna. D. magna were tested in three size-classes: small (1.4mm, SE=0.013), medium (2.5mm, SE=0.026), and large (3.1mm, SE=0.022) with six concentrations of crude oil (10, 50, 100, 400, 600, and 1700mgL −1 ). The most important results of our experiment were as follows: (1) Crude oil...
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