Fish respond to stress in a proportional way that
reflects the severity and duration of the stressor (Barton,
1997). These responses prepare the organism to the socalled
“fight or flight” response, which is an attempt to
escape from the adversity (Morgan and Iwama, 1997).
Consequently the fish physiological reactions to that
specific type of stressor needs to be analyzed, both in
relations to the response, as to its intensity (Kriger-
Azolini et al., 1989).