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Taurine and/or inorganic potassium as dietary osmolyte counter the stress and enhance the growth of GIFT reared in ion imbalanced low saline water.

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Title Taurine and/or inorganic potassium as dietary osmolyte counter the stress and enhance the growth of GIFT reared in ion imbalanced low saline water.
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Creator Not Available
 
Subject Sodium potassium ATPase Aquaporin Chloride channel2 Stress enzymes GIFT
 
Description Not Available
The effects of dietary osmolytes for alleviating osmotic stress and enhancing growth are not well elucidated in
fish reared in inland saline water. The present study evaluated the effects of dietary taurine or potassium (K+)
individually or in combination on growth, ionic homeostasis, and stress response of GIFT tilapia reared in po-
tassium deficient low saline water (PDLSW, 10 ppt salinity) mimicking inland saline water. Isonitrogenous and
isoenergetic diets supplemented with five potassium concentrations (0, 0.3, 0.45, 0.6 and 0.75 %), two taurine
(T) concentrations (0.5 and 1.0 %) and two combinations of both (K+ 0.1 % + T 0.5 % and K+ 0.2 % + T 0.5 %)
were fed to GIFT juveniles (4.4 ± 0.02 g body weight) and reared in PDLSW for 45 days. The fish fed on the diet
fortifying with K+ 0.2 % + T 0.5 % showed the highest growth performance among the controls and other
treatment groups. Dietary supplementation had no effects on PDLSW induced increase in osmoregulatory end-
points. The optimum dietary potassium requirement of GIFT reared in PDLSW was 0.57 and 0.599 g/100 g diet.
Dietary K+ down-regulated the PDLSW induced expression of NKAa1, AQP1, and ClC2, whereas inhib-
ited taurine-induced up-regulation of AQP1 and CLC2, which is the first report in tilapia. In addition, dietary K+
and taurine modulated antioxidant and metabolic enzyme activities for easing stress and balancing energy re-
quirements. Thus, blending of potassium (0.2 %) and taurine (0.5 %) in the diet appears best to mitigate stress
and enhance GIFT growth reared in inland saline water.
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Date 2023-05-16T04:10:29Z
2023-05-16T04:10:29Z
2021-11-29
 
Type Journal
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/77427
 
Language English
 
Relation Not Available;
 
Publisher Elsevier