title: Effect of starvation and refeeding on digestive enzyme activities in juvenile roach, Rutilus rutilus caspicus.
abstract: We evaluated the effects of starvation and refeeding on digestive enzyme activities in juvenile roach, Rutilus rutilus caspicus. Fish were divided into four feeding groups (mean mass 1.68 ± 0.12 g). The control group was fed to satiation twice a day throughout the experiment with formulated diet (SFK). The other three groups were deprived of feed for 1(S1), 2(S2), and 3(S3) weeks, respectively, and then fed to satiation during the refeeding period. The results showed that trypsin specific activity was not affected significantly either by starvation or refeeding, in all experimental groups. Chymotrypsin specific activity did not change significantly in S1 fish during the experimental period. In S2 and S3 fish no significant changes were observed during the starvation period. Upon refeeding, the activity increased in S2 fish, while it decreased in S3 fish. Amylase specific activity decreased significantly during the starvation period in all experimental groups. Upon refeeding, the activity increased. Alkaline phosphatase specific activity did not change significantly during the experiment period in S3 fish, while it showed significant changes during the starvation and refeeding period in the S1 and S2 fish. Starvation also had a significant effect on the structure of the intestine.
authors: Department of Fisheries, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.
authors: Marzieh
authors: M
authors: Abolfathi
authors: Abdolmajid
authors: A
authors: Hajimoradloo
authors: Rasool
authors: R
authors: Ghorbani
authors: Abbas
authors: A
authors: Zamani
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism; D000704:Analysis of Variance; D000818:Animals; D002918:Chymotrypsin / Q000378:metabolism; D003530:Cyprinidae / Q000254:growth & development* / Q000378:metabolism*; D004063:Digestion / Q000502:physiology*; D005247:Feeding Behavior / Q000502:physiology*; D029941:Fish Proteins / Q000378:metabolism; D007413:Intestinal Mucosa / Q000201:enzymology; D007422:Intestines / Q000201:enzymology; D059748:Proteolysis; D012995:Solubility; D013217:Starvation / Q000201:enzymology*; D016019:Survival Analysis; D014357:Trypsin / Q000378:metabolism; D000516:alpha-Amylases / Q000378:metabolism
chemical_list: D029941:Fish Proteins; D000469:Alkaline Phosphatase; D000516:alpha-Amylases; D002918:Chymotrypsin; D014357:Trypsin