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Myo-inositol supplement helps the performance of seawater-acclimated Nile tilapia, Oreochromis niloticus.
- Source :
-
Aquaculture & Fisheries (2096-1758) . Jul2024, Vol. 9 Issue 4, p597-602. 6p. - Publication Year :
- 2024
-
Abstract
- Seawater (SW)-acclimated Nile tilapia, Oreochromis niloticus, reared under a salinity 30 environment had lower growth and survival than the freshwater (FW)-acclimated fish. It was hypothesized that cells of the SWacclimated fish had not been able to synthesize an adequate level of a compatible osmolyte, myo-inositol (MI), in adjusting to the salinity 30 environment. In this study, MI supplements, at 250, 500, and 750 mg/kg pellets, were provided to the fish through top-dressing. After the 30-day feeding trial, the following parameters were determined: final body weights; survival; biomass increase; feed conversion ratio (FCR); plasma osmolality and ions; and two transcripts in the gills mips250 and mipa1 encoding enzymes responsible for MI biosynthesis. The SW-acclimated O. niloticus receiving 500-mg MI supplement had significantly higher survival, biomass increase, and lower FCR than those of the SW-acclimated fish receiving no supplement. At 500-mg MI supplemental level, the increasing values of plasma osmolality and Na+ observed in SW-acclimated fish were significantly attenuated. The transcript mipa1, but not mips250, was markedly up-regulated in the SW-acclimated O. niloticus, compared with that of the FW-acclimated fish. Again, MI at 500-mg supplement attenuated the upregulation significantly. This study suggests that MI supplement at the optimum level enhanced the performance of SW-acclimated O. niloticus, and through yet unknown mechanisms, attenuated some of their physiological responses to the osmotic stress. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NILE tilapia
*INOSITOL
*FISH growth
*BIOMASS energy
*OSMOLALITY
Subjects
Details
- Language :
- English
- ISSN :
- 20961758
- Volume :
- 9
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Aquaculture & Fisheries (2096-1758)
- Publication Type :
- Academic Journal
- Accession number :
- 177811822
- Full Text :
- https://doi.org/10.1016/j.aaf.2022.09.002