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Polyculture of sea scallops (Placopecten magellanicus) suspended from salmon cages
Parsons, G.J.; Shumway, S.E.; Kuenstner, S.; Gryska, A. (2002). Polyculture of sea scallops (Placopecten magellanicus) suspended from salmon cages. Aquacult. Int. 10(1): 65-77
In: Aquaculture International. Springer: London. ISSN 0967-6120, more
Peer reviewed article  

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  • Parsons, G.J., correspondent
  • Shumway, S.E.
  • Kuenstner, S.
  • Gryska, A.

    Commercial and developmental operations for the culture of the sea scallop, Placopecten magellanicus, are present in Atlantic Canada and New England. In an experiment designed to examine the commercial feasibility of polyculture of scallops with Atlantic salmon (Salmo salar), we measured growth and survival of sea scallops grown in suspension at two salmon aquaculture sites in northeastern Maine (Johnson Cove (JC) and Treats Island (TI)). Sea scallop spat were grown in pearl nets and deployed on drop lines containing ten nets in August 1994. One drop line of ten nets was sampled about every four months and scallops were counted, measured and weighed. Scallop tissues were also analysed for paralytic shellfish toxins (PSP). The maximum level of PSP recorded during the study was 1174 μg STX equiv.·100 g tissue-1 (excluding adductor muscle weight). After one year, shell heights were 53.6 and 56.4 mm, growth rates were 0.11 and 0.12 mm per day and wet adductor muscle weights were 3.3 and 4.1 g (TI and JC, respectively). These growth rates were comparable to sea scallops grown in suspension culture to a nearby scallop aquaculture site and other areas in Atlantic Canada. Reduced rates of survival were found during the latter part of the experiment and were attributable, in part, to heavy fouling, predators and high stocking density. The potential for supplemental income, diversification of the salmon aquaculture industry, and feasibility of culturing scallops at adjacent sites to salmon operations does exist.

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