Feeding ω-3 PUFA enriched rotifers to Galaxias maculatus (Jenyns, 1842) larvae reared at different salinity conditions: effects on growth parameters, survival and fatty acids profile
- URI:
- https://hdl.handle.net/10925/1551
- Carrera:
- Ingeniería en Acuicultura - Ingeniería en Recursos Naturales Renovables
- Facultad:
- Facultad de Recursos Naturales
- Fecha de publicación:
- 2014-11-26
- Datos de publicación:
- Latin American Journal of Aquatic Research, Vol.41, N°3, 404-411, 2013
- Temas:
- Nutrición de larvas - Puye - Galaxias maculatus - Ácidos grasos
- Producción Alimentaria [191]
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- Resumen:
- Despite the well known importance of ω-3 polyunsaturated fatty acids (PUFA) in marine and
freshwater fish larvae, there are few studies on how essential fatty acid requirements and composition on
whole body can be altered by changes in water salinity. The present study aimed to determine the effect of
salinity on ω-3 PUFA requirements, larval growth survival and fatty acid composition of Galaxias maculatus
larvae cultured at two different salinities (0 and 15 g L-1) for 20 days while fed rotifers containing two
different levels of ω-3 PUFA (1.87 and 3.16%). The results denoted a marked difference in ω-3 PUFA
requirements and in the pattern of fatty acid deposition in the whole body of larvae reared at different
salinities, depending of ω-3 PUFA in diets. Thus, to improve growth and survival larvae of G. maculatus
reared at 0 g L-1 require higher levels of ω-3 PUFA, principally 18:3 ω-3. Larvae reared at salinities of 15 g L-1
require low levels of ω-3 PUFA for optimal survival, especially 18:3 ω-3. Eicosapentaenoic acid and
docosahexaenoic acid content in the whole body of larvae was also affected by water salinity.