Effects of starvation and dietary lipid on the lipid and fatty acid composition of muscle tissue of juvenile green abalone (Haliotis fulgens) Article uri icon

abstract

  • Lipid metabolism of juvenile abalone, either starved or fed diets containing either 3.0 (HL) or 0.12%25 (LL) lipid, was investigated. Abalone were initially fed a nutritionally balanced formulated diet. Both PUFA and HUFA were low in the experimental formulated diets. After 60 days, growth rates of abalone fed the formulated diets were low and probably reflective of a lack of sufficient essential fatty acids. However, the total lipid content of the muscle tissue of abalone fed diets LL and HL remained unchanged from that of the start of the experiment. However, the level in the starved abalone was significantly higher (21.5%25) than that of abalone at the start of the experiment. The percentage of polar lipid and neutral lipid in the abalone muscle tissue ranged from 70.8%25 to 76.1%25 and 23.9%25 to 29.2%25, respectively. Levels of 20:4n-6, 20:5n-3 and 22:5n-3 in the polar lipid of the muscle of the starved abalone significantly increased while levels of 20:4n-6 and 20:5n-3 in the neutral lipid for abalone in all treatments decreased, suggesting the essentiality of these HUFA. Levels of 20:5n-3 and 22:6n-3 in the polar lipid of the tissue of the starved abalone were significantly higher than the levels of these respective fatty acids in the abalone fed diets HL and LL. These higher levels probably reflect the weight loss associated with starvation combined with lipid not being used as an energy source. More research directed toward the determination of the fatty acid requirements of postlarvae and for successful maturation and a spawning of abalone needs to be conducted. © 2004 Elsevier B.V. All rights reserved.

publication date

  • 2004-01-01