ENDURANCE OF FARMED AND SEA-RANCHED ATLANTIC SALMON SALMO-SALAR L AT SPAWNING

Endurance of farmed and sea-ranched Atlantic salmon Salmo salar L. mal es was analysed during spawning time, The fish were endurance tested a t different swimming speeds (1.6-2.1 m s(-1)) in forced swim trials, T he sea-ranched males (51-65 cm, n = 20) fatigued significantly earlier than the farmed males (59-72 cm, n = 20),although the sea-ranched mal es were significantly smaller than the farmed males. When the size dif ference between the two groups were corrected for, no significant diff erence in the endurance of the two groups was found. Farmed salmon had a significant higher fat content in white muscle (4.7%) than sea-ranc hed salmon (1.1%).