Smoltification is a physiologically demanding transformation in salmon's life cycle. Managing this transition well in aquaculture is critical for both fish welfare and production success.
Smoltification represents one of the highest welfare-risk periods in salmon aquaculture. Fish undergoing this transformation are physiologically vulnerable, immunocompromised, and highly sensitive to handling stress. Poor management during this period causes significant mortality and suffering. The welfare challenges are compounded by the commercial pressure to transfer fish to sea cages at the optimal smolt window, sometimes before conditions are ideal. Lice infestations striking recent smolts before their immune systems have adapted cause particularly severe welfare impacts. Investing in smolt quality assessment, careful handling protocols, and disease prevention around the transfer period are among the highest-return welfare investments in salmon farming.