Abstract
WE have watched the spawning behaviour of salmon in six successive seasons, using for the purpose an observation tank built by the Dee Fishery Board and the University of Liverpool on a tributary of the Welsh Dee; and we have long been convinced, on circumstantial evidence, that sexually mature male parr make a significant contribution to the fertilization of the eggs. It is, however, difficult in normal circumstances to get direct evidence, for the female only sheds her ova when accompanied by an adult male, and the cloud of sperm released simultaneously by him masks any contribution made by the parr.
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Jones, J. W., and King, G. M., Salmon and Trout Mag., No, 128 (January 1950).
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JONES, J., KING, G. Spawning of the Male Salmon Parr (Salmo salar Linn. juv.). Nature 169, 882 (1952). https://doi.org/10.1038/169882a0
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DOI: https://doi.org/10.1038/169882a0
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