Color-Pattern Variation in Lake Erie Water Snakes: Prediction and Measurement of Natural Selection

Evolution ◽  
1993 ◽  
Vol 47 (6) ◽  
pp. 1819 ◽  
Author(s):  
Richard B. King
Keyword(s):  
Natural Selection ◽  
Lake Erie ◽  
Color Pattern ◽  
Water Snakes

scholarly journals COLOR-PATTERN VARIATION IN LAKE ERIE WATER SNAKES: THE ROLE OF GENE FLOW

Evolution ◽  
1995 ◽  
Vol 49 (5) ◽  
pp. 885-896 ◽  
Author(s):  
Richard B. King ◽  
Robin Lawson
Keyword(s):  
Gene Flow ◽  
Lake Erie ◽  
Color Pattern ◽  
Water Snakes

Natural Selection in Water Snakes (Natrix sipedon L.) on Islands in Lake Erie

Evolution ◽  
1958 ◽  
Vol 12 (4) ◽  
pp. 504 ◽  
Author(s):  
Joseph H. Camin ◽  
Paul R. Ehrlich
Keyword(s):  
Natural Selection ◽  
Lake Erie ◽  
Water Snakes

Color pattern variation in Lake Erie water snakes: inheritance

1993 ◽  
Vol 71 (10) ◽  
pp. 1985-1990 ◽  
Author(s):  
Richard B. King
Keyword(s):  
Lake Erie ◽  
Genetic Basis ◽  
Genetic Correlations ◽  
Color Pattern ◽  
Nerodia Sipedon ◽  
Major Locus ◽  
Water Snake ◽  
Estimate Heritability ◽  
Opposing Effects ◽  
Water Snakes

The hypothesis that color pattern variation in Lake Erie island water snake (Nerodia sipedon) populations results from the opposing effects of natural selection and gene flow requires that this variation have a genetic basis. To determine whether color pattern variation is genetically based, data on the color pattern of wild-caught females and their captive-born offspring were used to estimate heritability of and correlations among four color pattern components. These data, and the results of two laboratory crosses, were also used to test for major locus influences on color pattern. Heritabilities of color pattern components estimated from sib analysis were significantly greater than zero for all four color pattern components, ranging from 0.34 to 0.79. Phenotypic and genetic correlations among color pattern components were positive, ranging from 0.24 to 0.55 (phenotypic correlations) and from 0.40 to 0.82 (genetic correlations). However, inheritance of color pattern was not strictly quantitative. Rather, a major locus appeared to influence color pattern, with alleles at this locus possibly determining whether snakes had regular (mainland-like) or reduced color patterns. Allele frequencies at this locus may have influenced the rate at which island and mainland water snake populations initially differentiated from each other, and may explain the lack of reduced-pattern morphs under similar selective regimes elsewhere.

Color-Pattern Variation in Lake Erie Water Snakes: The Role of Gene Flow

Evolution ◽  
1995 ◽  
Vol 49 (5) ◽  
pp. 885 ◽  
Author(s):  
Richard B. King ◽  
Robin Lawson
Keyword(s):  
Gene Flow ◽  
Lake Erie ◽  
Color Pattern ◽  
Water Snakes

Natural Selection in Middle Island Water Snakes (Natrix sipedon L.)

Evolution ◽  
1960 ◽  
Vol 14 (1) ◽  
pp. 136 ◽  
Author(s):  
Paul R. Ehrlich ◽  
Joseph H. Camin
Keyword(s):  
Natural Selection ◽  
Water Snakes

A Population of Lake Erie Island Water Snakes

Copeia ◽  
1949 ◽  
Vol 1949 (1) ◽  
pp. 76 ◽  
Author(s):  
Edward S. Thomas
Keyword(s):  
Lake Erie ◽  
Water Snakes
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