Open-jaw syndrome in chinook salmon (Oncorhynchus tshawytscha) at a hatchery

Journal of the Fisheries Research Board of Canada
By: , and 

Links

Abstract

Nearly 0.5% of the yearling spring chinook salmon (Oncorhynchus tshawytscha) at a national fish hatchery were observed with mouth agape, the condition occurring in two of 16 ponds. X-radiographs and histological preparations indicated that the articular bone of the lower jaw was malformed and dislocated dorsal and posterior to its normal point of attachment. The bone appeared to be embedded in the mandibular muscle and surrounded by an extensive fibrous tissue network. Genetic aberration, environmental interaction, and teratogenic substances are discussed as possible causes of the anomaly.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Open-jaw syndrome in chinook salmon (Oncorhynchus tshawytscha) at a hatchery
Series title Journal of the Fisheries Research Board of Canada
DOI 10.1139/f73-304
Volume 30
Issue 12
Year Published 1973
Language English
Publisher NRC Research Press
Contributing office(s) Western Fisheries Research Center
Description 3 p.
First page 1890
Last page 1892
Online Only (Y/N) N
Additional Online Files (Y/N) N