Comparison of some physical characteristics of salmonids under culture conditions using underwater video imaging techniques ...

• Main Author: Jones, Rachael Elizabeth
• Format: Text
• Language: English
• Published: University of British Columbia 2009
• Subjects: Atlantic salmon; Salmo salar
• Online Access: https://dx.doi.org/10.14288/1.0058938; https://doi.library.ubc.ca/10.14288/1.0058938

Body dimensions and swimming speeds of Atlantic salmon (Salmo salar) and Chinook salmon (Oncorhynchus tshawytscha) were measured in order to try to explain some of the observed growth differences between the two species under similar husbandry conditions, and to find an accurate estimator of individual fish mass from body dimensions. Size distribution of individual Chinook salmon in sea cages was also examined. Data was collected using a pre-existing non-invasive underwater video imaging system (VICASS) based on the principles of stereoimagery. An existing database of physical measurements was also analyzed (consisting of 1539 Atlantic salmon ranging in size from 0.42 to 8.50 kg and 840 chinook salmon ranging in size from 0.009 to 4.91 kg). Average fish size varied significantly with position in six out of fourteen cages of chinook salmon. This result suggested the presence of a dominance hierarchy, in which the largest fish in the cage are found in the best apparent location in the cage. Swimming speeds for ...