Comparative fatty acid profiles of wild and farmed tropical freshwater fish rohu (Labeo rohita)
- 462 Downloads
The proximate composition of the whole body and the fatty acid composition of the liver, muscle, eye and brain of wild and cultured rohu (Labeo rohita) were analyzed. The cultured species was found to have significantly (P < 0.05) higher lipid contents than its wild counterpart. The saturated (SFA) and monounsaturated (MUFA) fatty acid contents were significantly higher in the cultured species, whereas the n-6 and n-3 polyunsaturated fatty acid (PUFA) levels were higher in the wild species. Fatty acids C16:0 and C18:1 n-9 were the principal fatty acids of the SFAs and MUFAs, respectively, identified in the analyses. Docosahexaenoic acid, eicosapentaenoic acid, and arachidonic acid were the predominant PUFAs in both groups, and all three were found to be present at significantly (P < 0.05) higher levels in the wild species. Erucic acid (C22:1 n-9), which was the predominant fatty acid (30.76%) in the feed, was detected only at low levels in muscle (0.30%), liver (1.04%) and eye (1.28%) of cultured fish tissue.
KeywordsCultured and wild Labeo rohita Erucic acid Fatty acid profile n-6 and n-3 PUFA
The authors are grateful to the Director, Central Institute of Fisheries Education, Mumbai, for providing facilities for carrying out the work. The first author is grateful to the Central Institute of Fisheries Education, Mumbai for awarding the institutional fellowship.
- Ackman RG (2002) Freshwater fish lipids—an overlooked source of beneficial long chain –3 fatty acids. Eur J Lipid Technol 104:253–254. doi: 10.1002/1438-9312(200205)104:5<253::AID-EJLT253>3.0.CO;2-B CrossRefGoogle Scholar
- AOAC (1995) Official methods of analysis of AOAC International, vol 1, 16th edn. AOAC International, ArlingtonGoogle Scholar
- Chondar SL (1999) Labeo rohita. Biology of finfish and shellfish. SCSC Publishers, Howrah, West Bengal, India, pp 199–211Google Scholar
- De Silva SS, Gunasekera RM, Ingram BA (2004) Performance of intensively farmed Murray cod (Maccullochella peelii peelii) (Mitchell) fed newly formulated vs. currently used commercial diets, and a comparison of fillet composition of farmed and wild fish. Aquacult Res 35:1039–1052. doi: 10.1111/j.1365-2109.2004.01111.x CrossRefGoogle Scholar
- FAO (2003) Aquaculture production. Yearbook of fishery statistics, vol 96. Food and Agriculture Organization of the United Nations, Rome, ItalyGoogle Scholar
- Food Standards Australia New Zealand (2003) Erucic acid in food: a toxicological review and risk assessment. Technical Report series no. 21. Food Standards Australia New Zealand, CanberraGoogle Scholar
- Nayak J, Nair PG, Viswanathan AK, Mathew S (2003) Lipase activity in different tissues of four species of fish: rohu (Labeo rohita Hamilton), oil sardine (Sardinella longiceps Linnaeus), mullet (Liza subviridis Valenciennes) and Indian mackerel (Rastrelliger kanagurta Cuvier). J Sci Food Agric 83:1139–1142. doi: 10.1002/jsfa.1515 CrossRefGoogle Scholar
- Tocher DR, Harvie DG (1988) Fatty acid composition of the major phosphoglycerides from fish neural tissue; (n-3) and (n-6) polyunsaturated fatty acids in rainbow trout (Salmo gairdneri) and cod (Gadus morhua) brains and retinas. Fish Physiol Biochem 5:229–239. doi: 10.1007/BF01874800 CrossRefGoogle Scholar