| Registro completo |
| Provedor de dados: |
OMA
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| País: |
Belgium
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| Título: |
Performance of <i>Macrobrachium rosenbergii</i> broodstock fed diets with different fatty acid composition
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| Autores: |
Cavalli, R.O.
Lavens, P.
Sorgeloos, P.
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| Data: |
1999
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| Ano: |
1999
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| Palavras-chave: |
Brood stocks
Fecundity
Feeding experiments
Polyunsaturated fatty acids
Prawn culture
Macrobrachium rosenbergii
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| Resumo: |
The effect of linoleic acid (18:2n-6) and n-3 highly unsaturated fatty acids (HUFA) on the reproductive performance and offspring quality of the freshwater prawn <i>Macrobrachium rosenbergii</i> was evaluated in a 180-day trial. Three isonitrogenous and isolipidic diets containing different levels of fatty acids, high 18:2n-6 and n-3 HUFA concentrations, high 18:2n-6 and low n-3 HUFA, and low 18:2n-6 and n-3 HUFA, were fed ad libitum to three groups of six females. Fecundity was improved by the addition of higher amounts of 18:2n-6 (from 3 to 13 mg g<sup>-1</sup> DW). As a consequence of higher fecundity, smaller eggs were obtained most likely because the number of oocytes competing for a limited amount of yolk was higher. The higher gonado-somatic index of females fed diets with high levels of 18:2n-6 and n-3 HUFA levels further supports this hypothesis. The fatty acid composition of the eggs reflected to some extent the composition of the diets. Eggs of females fed high levels of 18:2n-6 and n-3 HUFA had the highest n-3 HUFA content and had increased hatchability. Eight-day-old larvae from females fed high levels of 18:2n-6 and n-3 HUFA tended to present a better stress tolerance when exposed to 100 mg l<sup>-1</sup> total ammonia for 24 h. No other differences were detected among larval characteristics from the different offspring groups. Results demonstrate that feeding <i>M. rosenbergii</i> broodstock with high levels of 18:2n-6 and n-3 HUFA (13 and 15 mg g<sup>-1</sup> DW, respectively) improved fecundity, egg hatchability, and the overall quality of the larvae.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=4006
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| Fonte: |
%3Ci%3EAquaculture+179%3C%2Fi%3E%3A+387-402
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| Direitos: |
info:eu-repo/semantics/restrictedAccess
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