Nutritional Data on Six Oceanic Pelagic Fish Species from New Zealand Waters
✍ Scribed by Peter Vlieg; Talbot Murray; Denis R. Body
- Book ID
- 102971385
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 521 KB
- Volume
- 6
- Category
- Article
- ISSN
- 0889-1575
No coin nor oath required. For personal study only.
✦ Synopsis
Proximate composition, fatty acid profiles and concentrations of 22 elements of the edible muscle of six oceanic pelagic fish species from the New Zealand Exclusive Economic Zone were determined from samples of surface longline catches. The species analyzed were albacore tuna (Thunmes alalunga), butterfly tuna (Gasterochisma melampus), short-finned mako shark (Isurus oryrinchus), moonfish (Lampris guttutus), porbeagle shark (Lamna nasts), and swordfish (Xiphias gladius). Protein content of all species exceeded (20 %), except swordfish, which ranged between 16.4 and (19 %). In all species except swordfish and a single albacore tuna, the mean oil content was less than (5.0 %). The soluble carbohydrate content varied between 0.21 and (0.36 \mathrm{~g} / 100 \mathrm{~g}) wet wt in all species, with albacore tuna the highest measured. The (\mathrm{Zn}) concentration of swordfish ((1.3 \mathrm{mg} / 100 \mathrm{~g}) wet (\mathrm{wt})) was substantially higher than that in other finfish from the New Zealand fishing area. No marine wax esters were present in any of the fish examined: triacylglycerols (70(80 %) ) and phospholipids ( (10-15 %)) were the main constituents of the glycerol esters. Omega-3 polyunsaturated fatty acids ( (\omega-3) PUFA) ranged from 0.3 to (1.6 \mathrm{~g} / 100 \mathrm{~g}) wet (\mathrm{wt}), the highest being swordfish and albacore tuna ((1.1 \mathrm{~g} / 100 \mathrm{~g}) wet (\mathrm{wt})). Total mercury concentrations were lowest in butterfly tuna ((33 \mu \mathrm{g} / 100 \mathrm{~g})) and highest in mako ((216 \mu \mathrm{g} / 100 \mathrm{~g})). A strong linear relationship existed between total mercury and methyl mercury concentration and fish length in porbeagle and swordfish. Regression equations for length versus total and methyl mercury concentration were determined for porbeagle and swordfish as was the regression between methyl and nonmethyl mercury concentrations for all specimens. 1993 Academic Press. Inc.