Population structure of odd-broodline Asian pink salmon and its contrast to the even-broodline structure

Autor: E. A. Matzak, Fumio Yamazaki, V. V. Efremov, R. L. Wilmot, Anthony J. Gharrett, Charles M. Guthrie, H. Mayama, S. L. Hawkins, N. V. Varnavskaya
Rok vydání: 2002
Předmět:
Zdroj: Journal of Fish Biology. 60:370-388
ISSN: 1095-8649
0022-1112
Popis: Most of the variation (99%) of Asian odd-broodline pink salmon Oncorhynchus gorbuscha, based on data at 32 variable (46 total) allozyme loci from 35 populations, occurred within populations. The remaining interpopulation variation was attributable to: (1) differences between northern (the northern Sea of Okhotsk, eastern Kamchatka Peninsula and western Kamchatka Peninsula) and southern (Hokkaido Island, Kuril Islands and Sakhalin Island) populations; (2) differences between the southern areas; (3) low variation among populations within some areas. The pattern contrasted strongly with that observed for Asian even-broodline populations, which had a strong structure, possibly related to geographic and oceanographic influences. Isolation-by-distance analyses of each of the two broodlines showed a stronger relationship ( × 4.8) among even- than odd-broodline populations. Allele frequency differences between even- and odd-broodlines reflected the reproductive isolation of the broodlines. However, there were no fixed frequency differences which, considered with the differing population structures, suggests that migration-drift equilibrium has not yet obtained in one or both broodlines. The structural differences also suggest it is likely that the even- and odd-broodlines are of different ages and that one is derived from the other. Allozyme data do not provide a genealogical basis for identifying the ancestral lineage.
Databáze: OpenAIRE
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