Latitude of origin influences photoperiodic control of reproduction of deer mice (Peromyscus maniculatus).

@article{Dark1983LatitudeOO,
  title={Latitude of origin influences photoperiodic control of reproduction of deer mice (Peromyscus maniculatus).},
  author={John Dark and Patrick Gerard Johnston and Martin Healy and Irving Zucker},
  journal={Biology of reproduction},
  year={1983},
  volume={28 1},
  pages={213-20}
}
Three subspecies of Peromyscus maniculatus originating from different latitudes were maintained from birth in light dark cycles that provided between 10 and 18 h of light per day. At 50 days of age, Chihuahua, Mexico mice (latitude of origin 27 degrees N) and South Dakota, U.S.A. mice (44 degrees N) kept in the 10L:14D photoperiod had reduced gonadal and seminal vesicle weights and a lower spermatogenic index than corresponding mice kept in a 14L:10D photoperiod. Some Chihuahua and South Dakota… CONTINUE READING