XIII.—The Relation of Sea-Growth and Spawning Frequency in Salmo salar

• Published in: Proceedings of the Royal Society of Edinburgh
• Main Author: Calderwood, W. L.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1926
• Subjects: General Engineering; Canada; Norway; Atlantic salmon; Northern Norway; Salmo salar; Siberia
• Online Access: http://dx.doi.org/10.1017/s0370164600018903; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0370164600018903

The seasons at which the Atlantic salmon ascends rivers differ to a considerable extent in different countries. In northern Norway and eastern Canada the severe winter conditions compel salmon to ascend from the sea only after the rivers have become free from ice. In one or two of the large rivers of northern Siberia it has been noticed that the salmon are well up into the upper reaches when the ice breaks up, from which it has been argued that they ascend under the ice.