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Phenotypic variation of the Mexican duck (Anas platyrhynchos diazi) in Mexico

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Phenotypic variation of the Mexican duck (Anas platyrhynchos diazi) in Mexico; 1984; Article; Journal; Condor; Scott, N.J., Jr.; Reynolds, R.P.

Summary

A collection of 98 breeding Mexican Ducks (Anas platyrhynchos diazi) was made in Mexico from six areas between the United States border with Chihuahua and Lake Chapala, Jalisco, in order to study geographic variation. Plumage indices showed a relatively smooth clinal change from north to south; northern populations were most influenced by the Northern Mallard (A. platyrhynchos) phenotype. Measurements of total, wing, and culmen lengths and bill width were usually significantly larger in males at any one site, but showed no regular geographic trends. Hybridization between platyrhynchos and diazi phenotypes may or may not be increasing in the middle Rio Grande and Rio Conchos valleys; available data are insufficient to decide. A spring [...]

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Type Scheme Key
local-index unknown 5223752
local-pk unknown 5223752
series unknown Condor

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journalCondor
parts
typevolume
value86
typeissue
value3
languageEnglish
citationTypeArticle

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