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<p>Most studies on abalone feeding have focused on protein and total lipid levels. Here, <i>Haliotis fulgens</i> juveniles were fed with four macralgae <i>Ulva lactuca</i>, <i>Eisenia arborea</i>, <i>Macrocystis pyrifera</i>, <i>Gelidium robustum,</i> and a seagrass (<i>Phyllospadix torreyi</i>) for 174&#xa0;days and lipid composition was analysed in digestive gland and muscle. Better growth for juveniles fed <i>M. pyrifera</i> or <i>E. arborea</i> was observed, and survival was higher for juveniles fed <i>E. arborea</i>. Cholesterol is either synthesized de novo, or transformed from other phytosterols in abalone; several phystosterols were associated with survival. Highly unsaturated fatty acids (HUFA), and particularly docosahexaenoic acid (22:6n-3 or DHA) were found in tissues of juveniles fed <i>E. arborea</i>, that did not contain these HUFA. DHA in muscle phospholipids and several bacteria biomarkers in digestive gland (15:0, 17:0, and branched fatty acids) were negatively associated with growth. Survival was associated with 16:2n-4, a biomarker for diatoms, and <i>iso</i>18:0 a biomarker for mainly gut bacteria. Non-methylene interrupted fatty acids (NMI) were highest in abalone fed <i>U</i>. <i>lactuca</i>, in agreement with the capacity of molluscs to produce NMI when lacking HUFA. Finally, abalone survived for two months without any feed, so feeding experiments should last at least double that time.</p>

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Growth and lipid composition of green abalone (Haliotis fulgens Philippi) fed different macroalgae and a seagrass

  • 期刊论文

  • 发表日期：

    2025年5月1日

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  • Elena Palacios-Mechetnov,
  • Angélica Pérez-Juárez,
  • Omar A. López-Verdugo,
  • Olivia Arjona,
  • Alejandra Mazariegos-Villarreal,
  • Elisa Serviere-Zaragoza

摘要

Most studies on abalone feeding have focused on protein and total lipid levels. Here, Haliotis fulgens juveniles were fed with four macralgae Ulva lactuca, Eisenia arborea, Macrocystis pyrifera, Gelidium robustum, and a seagrass (Phyllospadix torreyi) for 174 days and lipid composition was analysed in digestive gland and muscle. Better growth for juveniles fed M. pyrifera or E. arborea was observed, and survival was higher for juveniles fed E. arborea. Cholesterol is either synthesized de novo, or transformed from other phytosterols in abalone; several phystosterols were associated with survival. Highly unsaturated fatty acids (HUFA), and particularly docosahexaenoic acid (22:6n-3 or DHA) were found in tissues of juveniles fed E. arborea, that did not contain these HUFA. DHA in muscle phospholipids and several bacteria biomarkers in digestive gland (15:0, 17:0, and branched fatty acids) were negatively associated with growth. Survival was associated with 16:2n-4, a biomarker for diatoms, and iso18:0 a biomarker for mainly gut bacteria. Non-methylene interrupted fatty acids (NMI) were highest in abalone fed U. lactuca, in agreement with the capacity of molluscs to produce NMI when lacking HUFA. Finally, abalone survived for two months without any feed, so feeding experiments should last at least double that time.