Journal Title
Title of Journal: Fish Physiol Biochem
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Abbravation: Fish Physiology and Biochemistry
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Publisher
Springer Netherlands
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Authors: Xu Pang ShiJian Fu XiuMing Li YaoGuang Zhang
Publish Date: 2016/03/01
Volume: 42, Issue: 4, Pages: 1203-1212
Abstract
We investigated the effects of starvation and refeeding on growth and swimming performance and their relationship in juvenile black carp Mylopharyngodon piceus We measured the specific growth rate SGR resting metabolic rate RMR and constant acceleration test speed U CAT the maximum swimming speed at exhaustion by constant acceleration test with 01667 cm s−2 rate in a treatment group 21 days of starvation then 21 days of refeeding and control group routine feeding n = 20 Starvation resulted in a 17 decrease in body mass of black carp P 005 After 21 days of refeeding body mass was greater than that of prestarvation but still less than that of the control group at 42 days During the refeeding phase the SGR of the treatment group was higher than that of the control group P 005 Starvation resulted in a significant decrease in the RMR and U CAT After 21 days of refeeding both the RMR and U CAT recovered to the prestarvation levels In the control group individual juvenile black carp displayed strong repeatability of the RMR and U CAT across the measurement periods P ≤ 0002 In the treatment group RMR showed significant repeatability between prestarvation and refeeding P = 0007 but not between prestarvation and starvation or between starvation and refeeding U CAT showed significant repeatability between prestarvation and starvation P = 0006 and between prestarvation and refeeding P = 0001 but not between starvation and refeeding No correlation or only a weak correlation was found between any two variables of RMR U CAT and SGR whereas the increment of the U CAT ΔU CAT was negatively correlated with that of SGR during the starvation phase r = −0581 n = 20 P = 0007 and refeeding phase r = −0568 n = 20 P = 0009 This suggested that within individual black carp there is a tradeoff between growth and maintenance or development of swimming performance under foodlimited conditions
Keywords:
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