ISSN:
1573-5168
Keywords:
diets
;
feeding time
;
growth
;
circadian rhythms
;
insulin
;
c-AMP
;
lipids
;
proteins
;
carbohydrates
;
teleost fish
;
sea bass
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Juvenile sea bass, 1.5 years old, of mixed sex, held on long photoperiods were fed early on the photoperiod and late on the photoperiod, using different diets. Fish fed natural diets showed a daily rhythmicity of plasma insulin, liver c-AMP, plasma glucose, liver glycogen and muscle glycogen content, however, fish fed a commercial diet did not show this daily rhythmicity except for plasma insulin levels. In addition, these fish had significantly lower levels of plasma insulin, liver c-AMP and plasma glycerol than the group fed on the natural diets at similar feeding times. The time of feeding also induced different rhythmicity patterns in hormones and metabolites as well as a significant change in their mean levels. These facts are discussed in relation with the pre-feeding activity and increased appetite exhibited by the fish fed late on the photoperiod and with their implications on fish culture.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01874796
