Lumpfish ( Cyclopterus lumpus L) are highly prone to cataract development in the wild and in culture. There is evidence that cataract in farmed fish is related to nutrition. However, both the nutrients and the mechanisms involved in cataract development in lumpfish are not clear. Here we investigated the mechanisms involved and the role of dietary vitamin A in cataract development in a cultured lumpfish population. Cultured lu...

Growth and condition of piscivorous and non‐piscivorous walleye Sander vitreus classified on the basis of their stomach contents were compared to assess the consequences of their trophic flexibility. Piscivorous males showed a significantly higher growth trajectory than non‐piscivorous ones, while there was no difference in the growth of females. No differences were found in the condition of piscivorous and non‐piscivorous wal...