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Genetic Variation and Differentiation in Mexican Populations of Common Bush-Tanagers and Chestnut-Capped Brush-Finches
Peterson, A. Townsend Escalante P., Patricia Navarro-Sigüenza, Adolfo G.
Peterson, A. Townsend
Escalante P., Patricia
Navarro-Sigüenza, Adolfo G.
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Abstract
Genetic differentiation among four Mexican populations each of Common Bush-tanagers (Chlorospingus ophthalmicus) and Chestnut-capped Brush-finches (Atlapetes brunneinucha) was evaluated using allozyme electrophoresis. In both species, although levels of within-population variation are moderate, among-population variation is extreme, including fixed differences among populations. Genetic variation is significantly reduced in some populations on the smallest habitat islands. Differentiation is apparently unrelated to geographic distance among populations, and effects of habitat island size and isolation on genetic differentiation are not clear. Populations of the Sierra de los Tuxtlas in Veracruz, however, are strongly differentiated in both species.
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Date
1992-02-01
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University of California Press
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Keywords
Electrophores, genetic variation, genetic differentiation, cloud forest, tanager, brush-finch
Citation
Peterson, A. Townsend; Escalante P., Patricia; Navarro S., Adolfo. (1992). "Genetic Variation and Differentiation in Mexican Populations of Common Bush-Tanagers and Chestnut-Capped Brush-Finches." Condor, 94(1):242-251. http://www.dx.doi.org/10.2307/1368813.