Photoperiod affects light/dark preference and exploratory behaviour in noble crayfish (Astacus astacus)

 Photoperiod is known to affect crayfish growth, behaviour and hemolymph physiology in aquaculture;  Artificial day-night cycles have been related to stress in cultured animals;  Decreased exploratory behaviour and increased light avoidance are considered anxiety-like behaviours, induced by stress (Fossat et al. 2014);  We evaluated the effect of different photoperiods on noble crayfish activity and light/dark preference in an aquatic plus maze. Photoperiod affects light/dark preference and exploratory behaviour in noble crayfish (Astacus astacus) T. Abeel, I. Platteaux, E. Roelant, J. Adriaen and H. Vervaecke