Relationship Between Thickness of Daily Growth Increments in Sagittae and Change in Body Weight of Sockeye Salmon (Oncorhynchus nerka) Fry
- 1 October 1982
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Fisheries and Aquatic Sciences
- Vol. 39 (10) , 1335-1339
- https://doi.org/10.1139/f82-179
Abstract
A total of 64 laboratory-reared sockeye salmon (O. nerka) fry were marked to enable identification as individuals. Each was weighed initially on June 6 or 8, 1979; and again on July 6; and surviving fish were weighed a 3rd time on July 20. After the final weighing, sagittae were removed and a standard otolith radius, corresponding to each weight, was determined by counting back from the otolith edge the appropriate number of daily increments. The regression of 1n otolith radius on 1n fish weight was linear, with r2 = 0.92, demonstrating a relationship between mean thickness of a daily increment in sagittae, and mean daily change in weight of the fry. Using the regression line, previous weights were back calculated from corresponding otolith radii with error in the order of 15%.This publication has 1 reference indexed in Scilit:
- Daily Growth Rings in the Otoliths of Juvenile Sockeye Salmon (Oncorhynchus nerka)Canadian Journal of Fisheries and Aquatic Sciences, 1980