husbandry practices of these species. Thus, there was
also an interest in the elucidation of the relation
between NaCl and improved performance. The study
consisted of the ana1ysis of survival and blood
parameters (Na+ and cr ion levels, osmolality,
hematocrit and cortisol) in fish gradually or direct1y
exposed to sa1initiesbetween Oand 3.0 % NaCl