Multiple paternity in a wild population of northern water snakes, Nerodia sipedon

@article{Barry1992MultiplePI,
  title={Multiple paternity in a wild population of northern water snakes, Nerodia sipedon},
  author={Frances E. Barry and Patrick James Weatherhead and David P. Philipp},
  journal={Behavioral Ecology and Sociobiology},
  year={1992},
  volume={30},
  pages={193-199}
}
For most animal species, a single mating is sufficient to fertilize all of a female's offspring. As a result, females do not usually increase their reproductive success with successive matings. However, multiple paternity has been discovered in many animal taxa. We demonstrate that the majority of female water snakes in a wild population mate with more than one male for each litter. Field observations indicated that a highly skewed operational sex ratio (3.6:1 M : F) during the breeding season… CONTINUE READING

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