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- Title
Separate and combined effects of cyclic fasting andl-carnitine supplementation in red porgy ( Pagrus pagrus, L. 1758).
- Authors
Nogueira, Natacha; Cordeiro, Nereida; Canada, Paula; Cruz e Silva, Paula; Ozório, Rodrigo O A
- Abstract
We examined the effects of cyclic fasting in red porgy ( Pagrus pagrus) fed different dietary carnitine levels. Juvenile fish (23.58 ± 3.49 g) were divided into eight groups - four groups were fed every day to apparent satiation, while the other four were fasted for 7 days every 2 weeks. In each feeding regime, two replicates were fed anl-carnitine non-supplemented diet (46 mg kg−1) and the other two groups were fed anl-carnitine supplemented diet (630 mg kg−1). Fish fed 630 mgl-carnitine accumulated two times morel-carnitine in muscle than fish fed 46 mgl-carnitine. Cyclic fasting reduced the growth performance and lipid content in the liver. Carnitine supplementation did not affect performance and body composition, but decreased the n-6 PUFA content. Moreover, the combined effects 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 ofl-carnitine in cyclic fasted fish contributed towards a lower degree of vacuolization than in fish fed to apparent satiation. Regardless of the feeding regime applied, the spleen of fish fed thel-carnitine-supplemented diet was haemorrhagic and hyper activation of melanomacrophage cells was observed.
- Subjects
RED porgy; FISH nutrition; DIETARY supplements; CARNITINE; FASTING
- Publication
Aquaculture Research, 2010, Vol 41, Issue 11, pe795
- ISSN
1355-557X
- Publication type
Article
- DOI
10.1111/j.1365-2109.2010.02596.x