THE EFFECT OF EXHAUSTIVE EXERCISE TRAINING AND FASTING ON POST2EXERCISE OXYGEN CONSUMPTION RATE IN SOUTHERN CATFISH ( SILURUS MERID IONAL IS CHEN)

To testwhether training and fasting have significant effects on maintenance energy expenditure and anaerobic me-abolism,the resting oxygen consump tion rate (VO-rest ) and post-exercise VO-(EPOC) in southern catfish (S ilurusm eridi-nalis Chen) fed on maintenance rations (1. 5% body mass per day) or fasted during 15d of exhaustive exercise training5 min chasing) and a subsequent 5d without trainingwas investigated at -5℃. Two group s kep t under the same conditionsithout exercise training acted as feeding and fasting controls. The VO-rest values of both feeding and fasting controls de-reased significantly during the experiment (P < 0. 05),while those of the feeding and fasting training group swere signifi-antly increased after 15d of training (P < 0. 05). VO-rest of both training group s decreased significantly to control levels af-er training was stopped. The VO-peak values of both feeding and fasting controls decreased significantly during the experi-ent (P < 0. 05),while those of the feeding and fasting training group s were unchanged after 15d of training. VO-peak ofoth training group s decreased significantly to control levels after trainingwas stopped. There were no significant differencesn excess post-exercise VO- (EPOC) between any training and control group s. It is suggested that: (1) VO-rest and VO-peakere significantly improved by exercise training compared with the control group s,but returned to their previous values 5dfter stopp ing training; (-) post-exercise VO- recovered faster in training group s compared with control group s,and thisrait persisted 5d after stopp ing training; (3) training had similar physiological effects on feeding and fasting southern cat-ish,excep t that VO-rest wasmore sensitive to training in the fasting group.