Abstract
A Robertsonian pattern of variation exists in the Atlantic salmon from North America in which modal chromosome counts for different river systems vary from 54 to 56. All show an arm number of 72, as determined by counts from cell cultures (Roberts, 1970). Diploid numbers reported for the Atlantic salmon from embryo squashes include 56 for Quebec (Boothroyd, 1959) and northern Europe (Sepporaara, 1962), 58 for Wales (Rees, 1967), and 60 for northern Europe (Prokofieva, 1934; Svardson, 1945). Again, the arm number is constant at 72. The Atlantic salmon has received more attention from chromosome cytologists than any other fish and the Robertsonian pattern seems to be adequately documented. Chromosomal sexual dimorphism has not been demonstrated.
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References
Prokofieva, A.: On the chromosome morphology of certain pisces. Cytologia 5: 498, 1934.
Svardson, G.: Chromosome studies on Salmonidae. Rept. Swedish Inst. Fresh Water Res. Drottningholm, vol. 23, 151 pp., 1945.
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Roberts, F. L.: Atlantic salmon (Salmo salar) chromosomes and speciation. Trans. Am. Fish. Soc. 99: 105, 1970.
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© 1971 Springer Science+Business Media New York
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Beçak, M.L. et al. (1971). Salmo salar salar. In: Beçak, M.L., et al. Chromosome atlas: Fish, Amphibians, Reptiles and Birds. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-38220-2_3
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DOI: https://doi.org/10.1007/978-3-662-38220-2_3
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