Lipid characterisation of different tissues and fillet portions of intensively farmed Murray Cod Maccullochella peelii peelii

Palmeri, Giorgio, Turchini, Giovanni and De Silva, Sena 2006, Lipid characterisation of different tissues and fillet portions of intensively farmed Murray Cod Maccullochella peelii peelii, in AQUA 2006 : linking tradition & technology, highest quality for the consumer : May 9-13, 2006, Fortezza da Basso Convention Centre, Firenze (Florence), Italy : international conference & exhibition, [World Aquaculture Society], [Baton Rouge, La.].


Title Lipid characterisation of different tissues and fillet portions of intensively farmed Murray Cod Maccullochella peelii peelii
Author(s) Palmeri, Giorgio
Turchini, Giovanni
De Silva, Sena
Conference name World Aquaculture Society. Meeting (2006 : Florence, Italy)
Conference location Florence, Italy
Conference dates 10-13 May 2006
Title of proceedings AQUA 2006 : linking tradition & technology, highest quality for the consumer : May 9-13, 2006, Fortezza da Basso Convention Centre, Firenze (Florence), Italy : international conference & exhibition
Publication date 2006
Publisher [World Aquaculture Society]
Place of publication [Baton Rouge, La.]
Summary Although many studies have focused on the lipid and fatty acids composition of farmed fish, no many have investigated their deposition pattern in different portions of the fillet. Previous studies, mainly on salmonids, have shown that lipids distribution varies greatly depending on the species, portion and type of muscle, but nevertheless, there is not accurate description of its deposition pattern in many fish, in particular in warm water, freshwater carnivorous species. Murray cod is the largest Australian native freshwater carnivorous fish and supports a small but well established and fast growing industry. The objective of this study was therefore to determine if there was any difference in lipid and fatty acid in different tissues such as muscle, liver and perivisceral fat and in different portions of the fillet of farmed Murray cod.

Three size fish (small, medium and large), all fed the same commercial diet, were selected from a commercial intensive farm. The left fillet of each fish was sectioned into nine portions, according to muscle lines and main anatomical features. The nine portions as well as whole right fillet, liver and perivisceral fat were analysed for proximate and fatty acid composition (Table 1).

Differences in lipid content were found amongst different portions of the fillet, with the dorsal/cranial portion (P1) recording the lowest and the more ventral/caudal portion (P8) recording the highest (P<0.05) value. The latter also recorded the highest amount of monounsaturated fatty acid (MUFA) and the lowest of polyunsaturated fatty acids (PUFA), arachidonic acid, 20:4n-6 (ArA), docosahexaenoic acid, 22:6n-3, (DHA) and n3/n6 ratio. In general, lipid content in the different fillet portions was inversely correlated to PUFA and directly to MUFA. Saturated fatty acid (SFA) and eicosapentaenoic acid, 20:5n-3 (EPA) did not show any discernible trend and were similar throughout, while significant differences of DHA and ArA content were observed. This study shows that lipid deposition in Murray cod varies remarkably and that different fatty acids are deposited at different rates. The results of this study show how different adjacent portions can be and therefore attention need to be paid when conducting chemical, nutritional and sensorial analyses on Murray cod.
Language eng
Field of Research 070401 Aquaculture
Socio Economic Objective 830199 Fisheries - Aquaculture not elsewhere classified
HERDC Research category E3 Extract of paper
Persistent URL http://hdl.handle.net/10536/DRO/DU:30014772

Document type: Conference Paper
Collection: School of Life and Environmental Sciences
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