Health survey of selected stocks of commercially exploited Norwegian bivalve molluscs
This paper describes the first systematic health survey of commercially exploited bivalve molluscs in Norway. The main aim of the work was to screen selected stocks of the native flat oyster Ostrea edulis and the introduced Manila clam Ruditapes philippinarum for the presence of pathogenic agents. S...
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1993
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Online Access: | http://hdl.handle.net/11250/108180 https://doi.org/10.3354/dao016149 |
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ftimr:oai:imr.brage.unit.no:11250/108180 2023-05-15T15:58:37+02:00 Health survey of selected stocks of commercially exploited Norwegian bivalve molluscs Mortensen, Stein H. 1993-08-05 1724330 bytes application/pdf http://hdl.handle.net/11250/108180 https://doi.org/10.3354/dao016149 eng eng urn:issn:0177-5103 http://hdl.handle.net/11250/108180 http://dx.doi.org/10.3354/dao016149 149-156 16 Diseases of Aquatic Organisms bløtdyr molluscs Journal article Peer reviewed 1993 ftimr https://doi.org/10.3354/dao016149 2021-09-23T20:15:07Z This paper describes the first systematic health survey of commercially exploited bivalve molluscs in Norway. The main aim of the work was to screen selected stocks of the native flat oyster Ostrea edulis and the introduced Manila clam Ruditapes philippinarum for the presence of pathogenic agents. Samples were also collected from the indigenous clam Ruditapes decussatus and the scallop Pecten maximus, as well as from the introduced Pacific oyster Crassostrea gigas. The indigenous and cultured blue mussel Mytilus edulis and the Iceland scallop Chlamys islandica were not included. No abnormal mortalities were registered, nor were any serious pathogenic agents detected. Some tissue anomalies and some commensals or parasites were reported. These included thigmotrich ciliates on gills and in digestive diverticula, and intracytoplasmic Rickettsiales-like inclusions in epithelia of digestive gland diverticula of oysters, and a cyclopoid Modiolicola like copepod on scallop gills. Polymorphic, presumably inorganic, granulations were observed in connective tissues of oysters. Mature gonads were observed in the Manila clams. Based on the results, some advice on monitoring and management of the stocks is offered. Article in Journal/Newspaper Crassostrea gigas Iceland Pacific oyster Institute for Marine Research: Brage IMR Norway Pacific Diseases of Aquatic Organisms 16 149 156 |
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Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
bløtdyr molluscs |
spellingShingle |
bløtdyr molluscs Mortensen, Stein H. Health survey of selected stocks of commercially exploited Norwegian bivalve molluscs |
topic_facet |
bløtdyr molluscs |
description |
This paper describes the first systematic health survey of commercially exploited bivalve molluscs in Norway. The main aim of the work was to screen selected stocks of the native flat oyster Ostrea edulis and the introduced Manila clam Ruditapes philippinarum for the presence of pathogenic agents. Samples were also collected from the indigenous clam Ruditapes decussatus and the scallop Pecten maximus, as well as from the introduced Pacific oyster Crassostrea gigas. The indigenous and cultured blue mussel Mytilus edulis and the Iceland scallop Chlamys islandica were not included. No abnormal mortalities were registered, nor were any serious pathogenic agents detected. Some tissue anomalies and some commensals or parasites were reported. These included thigmotrich ciliates on gills and in digestive diverticula, and intracytoplasmic Rickettsiales-like inclusions in epithelia of digestive gland diverticula of oysters, and a cyclopoid Modiolicola like copepod on scallop gills. Polymorphic, presumably inorganic, granulations were observed in connective tissues of oysters. Mature gonads were observed in the Manila clams. Based on the results, some advice on monitoring and management of the stocks is offered. |
format |
Article in Journal/Newspaper |
author |
Mortensen, Stein H. |
author_facet |
Mortensen, Stein H. |
author_sort |
Mortensen, Stein H. |
title |
Health survey of selected stocks of commercially exploited Norwegian bivalve molluscs |
title_short |
Health survey of selected stocks of commercially exploited Norwegian bivalve molluscs |
title_full |
Health survey of selected stocks of commercially exploited Norwegian bivalve molluscs |
title_fullStr |
Health survey of selected stocks of commercially exploited Norwegian bivalve molluscs |
title_full_unstemmed |
Health survey of selected stocks of commercially exploited Norwegian bivalve molluscs |
title_sort |
health survey of selected stocks of commercially exploited norwegian bivalve molluscs |
publishDate |
1993 |
url |
http://hdl.handle.net/11250/108180 https://doi.org/10.3354/dao016149 |
geographic |
Norway Pacific |
geographic_facet |
Norway Pacific |
genre |
Crassostrea gigas Iceland Pacific oyster |
genre_facet |
Crassostrea gigas Iceland Pacific oyster |
op_source |
149-156 16 Diseases of Aquatic Organisms |
op_relation |
urn:issn:0177-5103 http://hdl.handle.net/11250/108180 http://dx.doi.org/10.3354/dao016149 |
op_doi |
https://doi.org/10.3354/dao016149 |
container_title |
Diseases of Aquatic Organisms |
container_volume |
16 |
container_start_page |
149 |
op_container_end_page |
156 |
_version_ |
1766394388896808960 |