Gray meat in the Atlantic sea scallop, Placopecten magellanicus, and the identification of a known pathogenic scallop apicomplexan

[Display omitted] •Highly pathogenic scallop apicomplexan confirmed in gray meat (adductor muscle) Atlantic sea scallops Placopecten magellanicus.•Identical apicomplexan found in populations of Iceland and Queen scallop species.•Intermediate “brown” stage associated with progression of infection.•Ap...

Full description

Saved in:
Bibliographic Details
Published in:Journal of invertebrate pathology 2016-11, Vol.141, p.66-75
Main Authors: Inglis, Susan D., Kristmundsson, Árni, Freeman, Mark A., Levesque, Megan, Stokesbury, Kevin
Format: Article
Language:English
Subjects:
Animals
Apicomplexa
Apicomplexan
Atlantic sea scallop
Disease
Gray meat
Parasite
Pectinidae - parasitology
Placopecten magellanicus
Protozoan Infections, Animal - pathology
Shellfish - parasitology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •Highly pathogenic scallop apicomplexan confirmed in gray meat (adductor muscle) Atlantic sea scallops Placopecten magellanicus.•Identical apicomplexan found in populations of Iceland and Queen scallop species.•Intermediate “brown” stage associated with progression of infection.•Apicomplexan found in all gray and brown meat scallops, rarely in white meat scallops.•Numerous developmental stages of the parasite present in various organs of the scallops.•Severe myodegeneration observed in gray meat scallop tissues. Atlantic sea scallop (Placopecten magellanicus) meats are normally firm and creamy white. However, scallops with small, darkened and stringy adductor muscle (gray meat) episodically occur along the Eastern Seaboard, most recently in the rotational management areas of Georges Bank after extended fishing closures. These gray meat scallops are associated with reduced harvestable biomass and mass mortality events. We tested age, nutritional stress and disease as causative agents for this condition. Adult scallops of different shell heights (SH) ranging from (90–145mm) were collected from Georges Bank and analyzed for meat quality and the presence of pathogens using biochemical, histopathological and molecular methods. Gray meat occurrence was weakly correlated with shell height only explaining 8.49% of the variance in a generalized additive model (GAMS). Gray meat weights were lower than white meat (p
ISSN:0022-2011
1096-0805
DOI:10.1016/j.jip.2016.10.008