Showing 3 results for Starvation
Mahtab Yarmohammadi, Mohammad , , , ,
Volume 4, Issue 4 (3-2016)
Abstract
The effects of starvation periods on physiological response of the juvenile Persian sturgeon, Acipencer persicus, was assessed through such stress factors as glucose, cortisol and hepatic enzymes for a period of 8 weeks. For this purpose, in a randomly designed experiment, five groups of fish (108.04 ± 0.28 gr) in 3 replicates were starved for a period of 0 (control), 1, 2, 3 and 4 weeks and fed them to satiation after their starvation lags. Blood plasma glucose and cortisol during starvation periods did not significantly change (p>0.05). This indicates high performance of this specific in maintenance of blood glucose during starvation and recovery of glucose level after feeding. However, plasma hepatic enzymes level in fasting treatments increased (p<0.05), but reached the control level after 4 weeks of feeding. Considering the role of liver enzymes in gluconeogenesis and taking into consideration the constant plasma glucose and cortisol during periods of food deprivation, it seems that liver enzymes in the Persian sturgeon during food deprivation play a key role in stabilizing blood glucose.
Considering the role of liver enzymes in gluconeogenesis, and taking into consideration the constant plasma glucose and cortisol during periods of food deprivation, In this study, it seems that liver enzymes in the Persian sturgeon during food deprivation play a key role in stabilizing blood glucose.
Raheleh Mirzaei, Sedigheh Babaei, Abdolmohammad Abedian Kenari,
Volume 6, Issue 2 (9-2017)
Abstract
The effect of dietary composition and starvation on growth and plasma metabolites in rainbow trout of 14 g average initial weight was investigated. A group of 240 trout juveniles were distributed in 12 of 150 L tanks. The experiment was performed in a 2*2 factorial design with 2 lipid levels (10 and 18%) and 2 feeding conditions (feeding and starvation) with 4 treatments each with 3 replicates. The fish were fed on diet 1 (lipid 10%, carbohydrate 29%) and diet 2 (lipid 18%, carbohydrate 19%) with the same protein level (47%) and energy. The juveniles were fed to apparent satiation for 3 weeks, followed by starving for 2 weeks and then refed for 3 weeks. The biometery and plasma biochemical parameters were analysed in the day of 21 (end of 3 weeks feeding), 35 (after 2 weeks starvation) and 60 (end of 3 weeks refeeding). Based on the result, the best growth performance in the fish occurred in diet with 10% lipid in control group (feeding group) and no compensatory growth occurred in this treatmennt after 2 weeks starvation. Moreover, the result of body composition showed the starvation and diet composition had more effect on body lipid than body protein and body lipid content decreased by starvation. The starvation and diet composition did not have any significant effect on cholesterol and triglyceride, but they induced decreasing plasma glucose level in the trout.
S.s. Babaei , A. Abedian Kenari, M. Hedayati, M.a. Yazdani-Sadati,
Volume 7, Issue 3 (9-2018)
Abstract
Aims: In this study, the effect of dietary macronutrient composition (two levels of protein 44% and 38% with two carbohydrate/fatty ratios of 1.4 and 3) was studied during starvation and re-feeding with the aim of achieving growth, body composition, and fatty acids in the body of Siberian Sturgeon (Acipenser baerii, Brandt, 1869).
Materials & Methods: This experimental study was carried out at the International sturgeon research institute in a completely randomized design. 360 fish (with an initial weight of 30±5g) were randomly distributed in 24 tanks of 500 liters (15 fish per tank) with a volume of 350-400 liters capacity. Fish were fed on 4 different diets; protein 38% - carbohydrate: lipid ratio 3 (LP-St), protein 44% - carbohydrate: lipid ratio 3 (HP-St), protein 38% - carbohydrate: lipid ratio 1.4 (LP-L) and protein 44% - carbohydrate: lipid ratio 1.4 (HP-L), respectively. The fish were fed apparent satiation for 3 weeks, then, starved for two weeks, and, then, re-fed for 5 weeks. The results were analyzed, using SPSS 22 software by multivariate analysis of variance and Duncan's test.
Findings: Compensatory growth did not occur in any treatments. In the control group, the best growth was observed in HP-L, while after re-feeding, HP-St represented the best weight gain and feed conversion ratio
Conclusion: The dietary composition has a significant effect on the SFA, MUFA, and PUFA fatty acids, while the two weeks of starvation slightly increase only MUFA and have no significant effect on other fatty acids.
