Sex ratios, mating behavior and sexual size dimorphism of the northern water snake, Nerodia sipedon

@article{Weatherhead2004SexRM,
  title={Sex ratios, mating behavior and sexual size dimorphism of the northern water snake, Nerodia sipedon},
  author={P. Weatherhead and Frances E. Barry and G. Brown and M. Forbes},
  journal={Behavioral Ecology and Sociobiology},
  year={2004},
  volume={36},
  pages={301-311}
}
Competition among males to mate is generally associated with male-biased size dimorphism. In this study we examine mating behavior in the northern water snake (Nerodia sipedon), a species in which males are much smaller than females despite substantial competition among males to mate. Competition among males was a consequence of a male-biased operational sex ratio due to slightly higher female mortality from a birth sex ratio of 1 : 1, and, in 1 year, more synchronous and longer mating activity… Expand

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