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Effect of feeding level and feeding frequency on specific dynamic action in Silurus meridionalis
Author(s) -
Fu S. J.,
Xie X. J.,
Cao Z. D.
Publication year - 2005
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.0022-1112.2005.00722.x
Subject(s) - specific dynamic action , biology , postprandial , catfish , zoology , metabolic rate , fish <actinopterygii> , endocrinology , fishery , insulin
The effect of feeding level ( F L ; 0·5 to 4% dry diet mass per wet fish body mass) and feeding frequency (once every 4 days to twice per day) on postprandial metabolic response was investigated in southern catfish Silurus meridionalis at 27·5° C. The results showed that there was no significant difference in the specific dynamic action (SDA) coefficient among the groups of different feeding levels ( P > 0·05). The duration increased from 26·0 to 40·0 h and the peak metabolic rate increased from 207·8 to 378·8 mg O 2 kg −1 h −1 when the feeding level was increased from 0·5 to 4%. The relationship between the peak metabolic rate ( R P , mg O 2 kg −1 h −1 ) and F L could be described as: R P = 175·4 + 47·3 F L ( r 2 = 0·943, n = 40, P < 0·001). The relationship between the SDA duration ( D , h) and F L could be described as D =30·97 F L 0·248 ( r 2 =0·729, n =40, P < 0·001).