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Separate and combined effects of cyclic fasting and l-carnitine supplementation in red porgy (Pagrus pagrus, L. 1758)
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Orientador(es)
Resumo(s)
We examined the e¡ects of cyclic fasting in red porgy
(Pagrus pagrus) fed di¡erent dietary carnitine levels. Ju venile ¢sh (23.58 3.49 g) were divided into eight
groups ^ four groups were fed every day to apparent sa tiation, while the other four were fasted for 7 days every
2 weeks. In each feeding regime, two replicates were fed
an L-carnitine non-supplemented diet (46 mg kg 1
)
and the other two groups were fed an L-carnitine sup plemented diet (630 mg kg 1
). Fish fed 630 mg L-carni tine accumulated two times more L-carnitine in muscle
than ¢sh fed 46 mg L-carnitine. Cyclic fasting reduced
the growth performance and lipid content in the liver.
Carnitine supplementation did not a¡ect performance
and body composition, but decreased the n-6 PUFA
content. Moreover, the combined e¡ects of fasting and
carnitine supplementation were observed on reducing
the n-3 fatty acid content. Areas of steatosis were found
in the livers of red porgy, but the results revealed that
supplementation of L-carnitine in cyclic fasted ¢sh con tributed towards a lower degree of vacuolization than
in ¢sh fed to apparent satiation. Regardless of the feed ing regime applied, the spleen of ¢sh fed the L-carni tine-supplemented diet was haemorrhagic and hyper
activation of melanomacrophage cells was observed.
Descrição
Palavras-chave
Fasting Compensatory growth Carnitine Red porgy . Faculdade de Ciências Exatas e da Engenharia
Contexto Educativo
Citação
Nogueira, N., Cordeiro, N., Canada, P., Cruz e Silva, P., & Ozório, R. O. (2010). Separate and combined effects of cyclic fasting and l‐carnitine supplementation in red porgy (Pagrus pagrus, L. 1758). Aquaculture Research, 41(11), e795-e806.
Editora
Wiley