Main Title |
New Eye Disease in Pen-Reared Chinook Salmon Caused by Metacestodes of 'Gilquinia squali' (Trypanorhyncha). |
Author |
Kent, M. L. ;
Margolis, L. ;
Fournie, J. W. ;
|
CORP Author |
Environmental Research Lab., Gulf Breeze, FL. ;Department of Fisheries and Oceans, Nanaimo (British Columbia). Pacific Biological Station. |
Publisher |
1991 |
Year Published |
1991 |
Report Number |
EPA/600/J-94/276; |
Stock Number |
PB94-191020 |
Additional Subjects |
Salmon ;
Parasitic diseases ;
Eye diseases ;
Reprints ;
Aquaculture ;
Mortality ;
Retina ;
Cataracts ;
Morbidity ;
Onchorhynchus tshawytscha ;
Gilquinia squali
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB94-191020 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
9p |
Abstract |
Eye infections by metacestodes of Gilquinia squali (Cestoda: Trypanorhyncha) were associated with mortality in chinook salmon Oncorhynchus tshawytscha reared in net-pens in seawater at two separate locations in British Columbia. Mortality associated with the disease was about 10% at one site and undetermined at the second site. The metacestode was found in the vitreous humor of moribund fish with eye lesions, whereas healthy fish from the same pen exhibited neither eye lesions nor the infection. The lesions were characterized by retinal folding and apparent retinal duplication, and cataractous changes; in severe cases, the cornea ruptured, and the lens was extruded. The spiny dogfish Squalus acanthias is the definitive host for the cestode. Spiny dogfish were prevalent in and around the affected net-pen sites, thus providing coracidia to infect the first intermediate host, which is most likely a crustacean. Although the metacestode is common in the eyes of European whiting Merlangius merlangus in the northeast Atlantic region, this is the first report of the infection in a salmonid. |
Supplementary Notes |
Pub. in the Jnl. of Aquatic Animal Health, v3 p134-140 1991. Prepared in cooperation with Department of Fisheries and Oceans, Nanaimo (British Columbia). Pacific Biological Station. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: New Eye Disease in Pen-Reared Chinook Salmon Caused by Metacestodes of 'Gilquinia squali' (Trypanorhyncha). |
Category Codes |
98F; 57N |
NTIS Prices |
PC A02/MF A01 |
Primary Description |
600/04 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
424431145 |
Origin |
NTIS |
Type |
CAT |