The role of some physiological changes in the feeding of Rutilus frisii kutums (Within Anzali port province)

Abstract

The main interested food for Rutilus frisii kutums in the eastern and
western coasts of Anzali port is cardium. On the basis of the
occurrence method the food items such as crab and balanus also
performs an important role in feeding behaviours of fishes in this
region. Feeding intensity during the period of study (from October
1994 up to March 1995) significantly differs from month to month
(p<0.0002). During this periods of time which coincides with the
progess of maturity stages, the fat content over the alimentary
canal was gradually reduced (r = -0.71, p intensity and fat content over alimentary canal there is a significant
difference (p hepatosomatic index (HSl) indicates that there is no correlation
between the HSI and feeding intensity, but the amount of HSI in
various months were significantly differed (p<0.05) and HSl level
was maximum in the prespawning period (February & March).