The biochemical and energetic composition of somatic body components of echinoderms from the northern Gulf of Mexico |
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Affiliation: | 1. Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of Haifa, Haifa 31905, Israel;2. Bionformatics Core Unit, University of Haifa, Haifa 31905, Israel;1. Azienda Agricola Ittica Caldoli, Loc. San Nazario, 71010 Poggio Imperiale, FG, Italy;2. Consiglio Nazionale delle Ricerche, Istituto di Scienze Marine, sez. Lesina, via Pola, 4, 71010 Lesina, FG, Italy |
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Abstract: | - 1.1. The biochemical and energetic compositions of the somatic body components of seven species of asteroids, one ophiuroid, and four echinoids from the northern Gulf of Mexico (30–95 m depth) were ascertained.
- 2.2. Levels of ash were high (68.5–90.8% dry wt) in all body-wall tissues, with the exception of the asteroid Echinaster modestus (51.6% dry wt). Levels of ash were low in the pyloric cecae (nutrient storage organ) of asteroids (4.6–30.8% dry wt).
- 3.3. Levels of lipid (8.1–34.5% dry wt), soluble protein (15.9–28.7% dry wt), and insoluble protein (18.1–48.6%, dry wt) were high in the pyloric cecae of all asteroids, but generally low in ophiuroid and echinoid body-wall tissues. High protein levels (28.5–44.5% dry wt) in the body-wall of the asteroids Echinaster modestus and Anthenoides pierceisuggest it may play a role in nutrient storage.
- 4.4. All somatic tissues contained low levels of carbohydrate (0.2–1.4% dry wt).
- 5.5. Levels of energy in pyloric cecal tissues (12.99–26.05 kJ/g dry wt) were 4–8 times higher than in echinoderm body-wall tissues (2.92–11.91 kJ/g dry wt).
- 6.6. The biochemical and energetic compositions of echinoderms from the northern Gulf of Mexico are similar to those of species from other latitudes and depths.
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