Daphnia - growth & development, Animals, Daphnia - physiology, Gene Expression Regulation, Daphnia - genetics, Real-Time Polymerase Chain Reaction, Life Cycle Stages, Hsp60 protein, Laboratories, Spine, Ecosystems, Food contamination, Genes, Body length, Environmental changes, Biology, Organisms, Experiments, Body composition, Ecosystem biology, Ca2+-transpo...