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Dietary phosphorus affected growth performance, body composition, antioxidant status and total P discharge of young hybrid sturgeon (♀ Huso huso × ♂ Acipenser schrenckii) in winter months.
- Source :
-
Journal of Applied Ichthyology . Oct2012, Vol. 28 Issue 5, p697-703. 7p. 4 Charts, 2 Graphs. - Publication Year :
- 2012
-
Abstract
- An 8-week feeding trial was carried out using young hybrid sturgeon ( ♀Huso huso × ♂Acipenser schrenckii) to study the effects of dietary phosphorus (P) on growth performance, body composition, liver and serum antioxidant status as well as the effluent P content in the wintertime. Four puffed pellet diets were formulated to contain graded total P levels at 0.63, 1.15, 1.85, and 2.12%, respectively. Triplicate groups of hybrid sturgeon (494.21 ± 18.63 g) were reared in concrete ponds (2.0 × 1.2 × 1.4 m), and fed one of the four diets for 8 weeks. Weight gain and feeding rate significantly decreased with increasing dietary P content, and fish fed the 2.12% P diet had negative growth. With the increase in dietary P, whole body ash and P content significantly increased. There was no inverse relationship between the whole body lipid content and dietary P level in young hybrid sturgeon. Hybrid sturgeon liver exhibited higher superoxide dismutase, catalase and glutathione peroxidase activities in the 0.63 and 1.15% dietary P treatment groups than those in the other two groups. Serum alkaline phosphatase activity increased significantly with increasing dietary P. Discharge of P into the pond increased significantly with increasing dietary P. In conclusion, a dietary P content between 0.63 and 1.15% helped young hybrid sturgeon to activate their antioxidant defense system and eradicate the free radicals, in order to reduce the antioxidant damage, while still keeping total P content in the pond at a relatively low level during the winter months. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01758659
- Volume :
- 28
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Ichthyology
- Publication Type :
- Academic Journal
- Accession number :
- 80026440
- Full Text :
- https://doi.org/10.1111/j.1439-0426.2012.02024.x