Effect of Perkinsus qugwadi on various species and strains of scallops

Abstract

DAO Diseases of Aquatic Organisms Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials DAO 36:143-151 (1999) - doi:10.3354/dao036143 Effect of Perkinsus qugwadi on various species and strains of scallops Susan M. Bower1,*, Janice Blackbourn2, Gary R. Meyer1, David W. Welch1 1Department of Fisheries and Oceans, Pacific Biological Station, Nanaimo, British Columbia V9R 5K6, Canada 2Island Scallops Ltd, 5552 West Island Hwy, Qualicum Beach, British Columbia V9K 2C8, Canada *E-mail: bowers@dfo-mpo.gc.ca ABSTRACT: Japanese scallops Patinopecten yessoensis, introduced into British Columbia, Canada, as a species for aquaculture, proved highly susceptible to an enzootic protistan parasite Perkinsus qugwadi (initially called SPX). Sporadic occurrence of the parasite among cultured scallops sometimes resulted in losses exceeding 90%. Native scallops (Chlamys rubida and Chlamys hastata) were resistant to infection and the pathogenic effects of the parasite. Weathervane scallops Patinopecten caurinus (not amenable to culture but closely related to the Japanese scallop) were not available to test for resistance to infection. Laboratory and field studies showed that first-generation progeny of Japanese scallops that survived an epizootic outbreak of P. qugwadi had a significant increase in resistance to infection and resulting mortalities. Hybrid scallops, resulting from a cross between Japanese scallop females (from the same group of scallops that survived an epizootic outbreak of P. qugwadi) and weathervane scallop males, had similar resistance to P. qugwadi. The identification of scallop stocks that are resistant to P. qugwadi has facilitated the development of a scallop culture industry in British Columbia. KEY WORDS: Perkinsus qugwadi · Patinopecten yessoensis · Scallops · Disease · Resistance Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in DAO Vol. 36, No. 2. Publication date: May 12, 1999 Print ISSN:0177-5103; Online ISSN:1616-1580 Copyright © 1999 Inter-Research.