Effect of essential fatty acids on maturation and spawning [in P. monodon]
1985
Anon.
The tissue lipid content and fatty acid composition in the hepatopancreas, tail muscle and gonad of unablated and ablated Penaeus monodon were determined. The hepatopancreas showed the highest lipid content at 15.72 to 25.20% in unablated and 22.47 to 34.90% in ablated females. Flesh lipid levels average 2.60%, with no marked variation throughout the maturation period. Ovarian lipid increased from 5.80% (unablated) and 7.50% (ablated) in immature ovaries. In unablated females, lipid values peaked (17.0%) in late maturing ovaries coupled with a drop in hepatopancreatic lipid, suggesting lipid mobilization to the ovaries. In ablated females, ovarian lipid progressively increased to a maximum of 21.90% in fully mature ovaries with a corresponding rise in hepatopancreatic lipid. Ovarian and hepatopancreatic lipids declined in spent females. Fatty acid profiles in the tissues consistently showed the presence of polyunsaturated fatty acid (PUFA) 20:4W6, 20:5W3 and 22:6W3. These fatty acids were reflected in the spawned eggs. The lipid level in the hepatopancreas appeared to be inversely related to the total PUFA concentrations in the ovaries. Lipid accumulation in ablated females was significantly higher than in unablated females
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