In this study, two parthenogenetic events within a family of the whitespotted bambooshark Chiloscyllium plagiosum are reported. A captive female produced multiple parthenogens. Unexpectedly, a single specimen of a total of nine parthenogens displayed external claspers characterizing the male sex in chondrichthyans. Upon dissection, internal sexual organs of this specimen were malformed or absent; however, the presence of clasp...

We tested the hypothesis that species (clones) of Daphnia , originating from lakes with very different cyanobacterial abundances, use strategies to optimize their performance in the presence of toxic Microcystis aeruginosa by distributing differently in vertical gradients of valuable food, toxigenic cyanobacteria, and temperature. A laboratory tube system with different combinations of food items in the temperature gradient wa...

A molecular analysis examining the level of relatedness in shoaling minnows Phoxinus phoxinus was conducted. The results revealed that individuals from within the same shoal were not more closely related to each other than to individuals from other shoals. This led to the conclusion that Schreckstoff may be less likely to have evolved in the context of kin selection.