Nutritional and commercial quality of the striped venus clam, Chamelea gallina, from the Adriatic sea |
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Authors: | Elena Orban Gabriella Di Lena Teresina Nevigato Irene Casini Roberto Caproni Generoso Santaroni Giuliana Giulini |
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Affiliation: | 1. National Research Institute for Food and Nutrition, Seafood Study Unit, Via Ardeatina 546, 00178 Rome, Italy;2. Cooperativa M.A.R.E. S.c.r.l., Via Enrico Toti 2, 47841 Cattolica, Rimini, Italy |
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Abstract: | Nutritional quality parameters (proximate and mineral composition, contents of glycogen, fatty acids, cholesterol, plant sterols, fat-soluble vitamins, carotenes) and ecophysiological and commercial quality indicators (Condition Index, percent content of meat and intervalvar fluid) of the striped venus clam, Chamelea gallina, from the central Adriatic coast of Italy were studied at seasonal intervals over a 1-year period. Contents of protein (8.55–10.7 g/100 g), total lipid (0.73–1.59 g/100 g), glycogen (2.25–4.96 g/100 g) and non-protein nitrogen (0.54–0.78 g/100 g) varied significantly during the year, reaching the highest values in winter, in coincidence with a peak of Condition Index. Gas chromatography of total lipids showed high percentages of n − 3 polyunsaturated fatty acids (33.7–41.9% of total fatty acids), in particular eicosapentaenoic (8.16–20.0% of total fatty acids) and docosahexaenoic acids (12.5–20.3% of total fatty acids) and low levels of total n − 6 polyunsaturated fatty acids (3.61–7.87% of total fatty acids). HPLC analysis of the unsaponifiable lipids showed low levels of cholesterol, the dominant sterol (28.3–34.2 mg/ 100 g), and variable amounts of plant sterols (stigmasterol + campesterol, β-sitosterol, fucosterol + brassicasterol), α-tocopherol and carotenes. |
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Keywords: | Bivalve molluscs Clam Chamelea gallina Nutritional quality Commercial quality |
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