Yellowtail Seriola quinqueradiata fed a non-fish meal diet and control
fish fed a standard fish meal diet were reared in neighboring net-cag
es under the same natural environmental conditions. The growth and foo
d consumption of the fish fed the non-fish meal diet (NFM fish) were s
imilar to the fish fed the control diet (control fish). Mortality due
to a natural infection with Pasteurella piscicida occurred among NFM f
ish, but not among control fish during 55 days of feeding experiment.
Plasma total cholesterol, free cholesterol and phospholipid of NFM fis
h were significantly lower than those of control fish. This result ind
icates that the decrease in the levels of plasma lipid components may
be a good indicator of reduced disease resistance in yellowtail.