The experimental units were 24 net pens (125 m3 each) of
which 12 were stocked with 200 fish each of group I and the
remaining 12 were stocked with 100 fish each of group II. All fish
had been on the same feeding regime prior to the trial, and they
had been fed a diet of 470 g kg–1 crude protein, 300 g kg–1 fat,
70gkg–1 NFE, 80 g kg–1 ash and 50 mg astaxanthin kg diet–1
(ROYAL manufactured by T. Skretting AS, Stavanger, Norway)
since September 1992.
The experimental units were 24 net pens (125 m3 each) ofwhich 12 were stocked with 200 fish each of group I and theremaining 12 were stocked with 100 fish each of group II. All fishhad been on the same feeding regime prior to the trial, and theyhad been fed a diet of 470 g kg–1 crude protein, 300 g kg–1 fat,70gkg–1 NFE, 80 g kg–1 ash and 50 mg astaxanthin kg diet–1(ROYAL manufactured by T. Skretting AS, Stavanger, Norway)since September 1992.
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