OPPOSING FITNESS CONSEQUENCES OF COLONS PATTERN IN MALE AND FEMALE SNAKES

• Local populations of the adder, Vipera berus, are polymorphic for dorsal colour pattern, containing both melanistic (black) and zig-zag patterned individuals. Colour patterns in snakes influence crypsis and thermoregulatory capacity and therefore may be s

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POLYMORPHISM; MELANISM; CRYPSIS; DIFFERENTIAL SURVIVAL; SELECTION; VIPERA BERUS; SEXUAL SIZE DIMORPHISM; VIPERA-BERUS; GARTER SNAKE; REPRODUCTIVE SUCCESS; THERMAL BIOLOGY; BODY-SIZE; LAKE ERIE; HETEROGENEOUS ENVIRONMENTS; ANTIPREDATOR BEHAVIOR; THAMNOPHIS

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