Pike perch (zander) aquaculture is growing rapidly in Europe. As a piscivorous predator, this species presents unique welfare challenges during domestication and intensive farming.
Pike perch welfare challenges are concentrated in early life stages and the domestication process. The transition from live prey to commercial feed involves prolonged periods where fish refuse to eat, causing starvation stress. Size grading to reduce cannibalism involves repeated handling stress. Their preference for dim environments means standard aquaculture lighting conditions create chronic discomfort. RAS systems offer the advantage of full environmental control, but technical failures — pump breakdowns, oxygen supply failures — can cause rapid mass mortality. The species is being domesticated over multiple generations, with each generation showing improved acceptance of commercial diets and captive conditions. Welfare improvements include dim lighting provision, gradual diet transition protocols, and size-matched stocking to reduce cannibalism. The welfare knowledge base for pike perch is developing rapidly alongside the expanding industry.