Abstract
The aim of this study was to compare the growth of juvenile Pacific oysters (mean weight 2.22 g; mean length 26.8 mm) reared with the suspended technique using three different types of trays fixed to long lines at a mussel farm located in the middle Adriatic Sea. Growth, mortality rate and quality traits of oysters cultured in a new type of tray (EXP) were compared to those of specimens reared in conventional trays (CON) and in “poches” (POC). Culture density was fixed at 0.03 oysters cm−2 in all the tray types. After 11 months of growth, oysters reared in all the tray types reached marketable size, weighing between 94.08 and 110 g without significant differences. Length (98.8–103.3 mm), width (61.1–70.5 mm) and height (31.6–34.1 mm) did not show significant variations. The condition index showed differences among EXP (93.17%) compared to CON (81%) and POC oysters (72.87%), and significant differences were found between those reared at the surface and the bottom, regardless of tray type. Concerning mortality, the EXP group (7.5%) recorded significantly smaller losses than CON (18.4%) trays and POC (31.6%).
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Acknowledgments
This research was partially supported by Marche Region, S.F.O.P Project 2000/2006N.06MI050505. We would like to thank Arch. Renzo Pellei and co-workers of Cooperativa Mitilpesca (San Benedetto del Tronto, Ascoli Piceno) for their efficient assistance during the samplings on the boat.
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Roncarati, A., Felici, A., Dees, A. et al. Trials on Pacific oyster (Crassostrea gigas Thunberg) rearing in the middle Adriatic Sea by means of different trays. Aquacult Int 18, 35–43 (2010). https://doi.org/10.1007/s10499-009-9267-1
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DOI: https://doi.org/10.1007/s10499-009-9267-1