Format:
Online-Ressource
ISSN:
1438-9312
Content:
Abstract: The current study was conducted to evaluate the effects of various dietary n−3/n−6 ratio on growth and lipid metabolism in gilthead seabream (Sparus aurata) juveniles. The fish were fed ad libitum on three isoproteic (52%), isolipidic (14%), and isoenergetic diets (21 MJ/kg), formulated to contain three different n−3/n−6 ratios: a high (3.8), medium (2.5), or low (0.9) ratio. Fish grew from 9.5 ± 0.1 g to 54.2 ± 0.7 g in 12 weeks. Growth rate (2.2% BW/day), voluntary feed intake (2.4 ± 0.1% BM/day), feed conversion ratio (1.38 ± 0.05), and net protein utilization (27.5 ± 1.0%) did not vary among treatments. In contrast, body lipid content and lipid deposition efficiency were significantly reduced in fish fed low n−3/n−6 ratio. Fish fed the highest n−3/n−6 ratio showed the lowest hepatic glucose‐6‐phosphate dehydrogenase (G6PD) activity (p = 0.02). The n−3/n−6 ratio decreased, while DHA/eicosapentaenoic acid (EPA) ratio increased significantly with decreasing dietary n−3/n−6 content. Among n−3 PUFA, the DHA and, particularly, the docosapentaenoic acid (DPA) showed the highest deposition rate both in muscle and liver. The lower deposition rate (〈1) of linoleic acid (LA) and linolenic acid (LNA) suggests that a reduction in dietary n−3/n−6 ratio may stimulate their transport to the intermediary metabolism for energy production.
In:
volume:113
In:
number:11
In:
year:2011
In:
pages:1332-1341
In:
extent:10
In:
European journal of lipid science and technology, Weinheim : Wiley-VCH, [2000]-, 113, Heft 11 (2011), 1332-1341 (gesamt 10), 1438-9312
Language:
English
DOI:
10.1002/ejlt.201100087
URN:
urn:nbn:de:101:1-2023031906051645289742
URL:
https://doi.org/10.1002/ejlt.201100087
URL:
https://nbn-resolving.org/urn:nbn:de:101:1-2023031906051645289742
URL:
https://d-nb.info/1283787288/34
URL:
https://doi.org/10.1002/ejlt.201100087
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