Polyculture of sea scallops (Placopecten magellanicus) suspended from salmon cages (original) (raw)

Abstract

Commercial and developmental operations for the culture of the seascallop, Placopecten magellanicus, are present in AtlanticCanada and New England. In an experiment designed to examine the commercialfeasibility of polyculture of scallops with Atlantic salmon(Salmo salar), we measured growth andsurvival of sea scallops grown in suspension at two salmon aquaculture sites innortheastern Maine (Johnson Cove (JC) and Treats Island (TI)). Sea scallop spatwere grown in pearl nets and deployed on drop lines containing ten nets inAugust 1994. One drop line of ten nets was sampled about every four months andscallops were counted, measured and weighed. Scallop tissues were also analysedfor paralytic shellfish toxins (PSP). The maximum level of PSP recorded duringthe study was 1174 μg STX equiv.·100 gtissue−1 (excluding adductor muscle weight). After one year,shell heights were 53.6 and 56.4 mm, growth rates were 0.11 and0.12 mm per day and wet adductor muscle weights were 3.3 and 4.1g (TI and JC, respectively). These growth rates were comparable tosea scallops grown in suspension culture to a nearby scallop aquaculture siteand other areas in Atlantic Canada. Reduced rates of survival were found duringthe latter part of the experiment and were attributable, in part, to heavyfouling, predators and high stocking density. The potential for supplementalincome, diversification of the salmon aquaculture industry, and feasibility ofculturing scallops at adjacent sites to salmon operations does exist.

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Authors and Affiliations

1. Marine Institute, Memorial University of Newfoundland, St. John's, NF, A1C 5R3, Canada
   G. Jay Parsons
2. Department of Marine Sciences, University of Connecticut, 1080 Shennecossett Road, Groton, 06340, USA
   Sandra E. Shumway
3. Flagship Wharf, New England Fisheries Development Association, Suite 600, 197 Eight Street, Charlestown, 02129, USA
   Sue Kuenstner
4. American Seafoods International, 40 Herman Melville Blvd., New Bedford, 02740, USA
   Alexander Gryska

Authors

1. G. Jay Parsons
2. Sandra E. Shumway
3. Sue Kuenstner
4. Alexander Gryska

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Parsons, G.J., Shumway, S.E., Kuenstner, S. et al. Polyculture of sea scallops (Placopecten magellanicus) suspended from salmon cages.Aquaculture International 10, 65–77 (2002). https://doi.org/10.1023/A:1021324610930

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• Issue date: January 2002
• DOI: https://doi.org/10.1023/A:1021324610930