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Effect of corn in diets for carnivorous catfish ( Lophiosilurus alexandri ) on metabolic and performance parameters
Author(s) -
Oliveira Camila Gomes de,
Espirito Santo Amanda Hastenreiter do,
Guilherme Helder de Oliveira,
Santos Fabio Aremil Costa dos,
Silva Luiz Felipe da Silveira,
Santos Welliene Moreira dos,
Malta Ana Carolina Andrade,
Luz Ronald Kennedy,
Costa Leandro Santos,
Ribeiro Paula Adriane Perez
Publication year - 2020
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.14795
Subject(s) - catfish , biology , bran , malic enzyme , zoology , amylase , weight gain , food science , body weight , enzyme , dehydrogenase , biochemistry , endocrinology , ecology , fishery , fish <actinopterygii> , raw material
The aim of this study was to evaluate the influence of dietary corn bran levels on the performance and energy metabolism of catfish ( Lophiosilurus alexandri ) juveniles. In total, 120 juveniles with initial average weight of 20.85 ± 2.01 g were distributed in 20 40 L aquariums in a recirculation system. These were distributed across five treatments (5, 10, 15, 20 and 25% of carbohydrate) and four replicates (aquariums), and fed for 63 days. The parameters evaluated were performance, hepatosomatic index (IHS), viscerosomatic index (VSI), intestinal morphometry, glucose, HDL, LDL, total cholesterol, triglycerides, amylase activity, glucose‐6‐phosphate dehydrogenase (G6PD) and malic enzyme activity. Different corn concentrations in diets affected performance, decreasing final weight and daily weight gain (DWG) by more than 10% ( p < .05). There was no statistical difference for HSI, VSI and intestinal morphometry ( p > .05). Glucose showed a linear behaviour, increasing with increasing corn bran levels. The activity of the amylase enzyme showed no significant difference between treatments ( p > .05). The activity of malic enzyme and G6PD showed a linear behaviour, in which the treatment of 5% corn presented lower activity in the liver of the animals. It is therefore concluded that having a concentration of corn above 10% in the diet worsens the development of catfish juveniles.