Evidence that the photoperiod controls the annual changes in testosterone secretion, testicular and body weight in subtropical male goats.

@article{Delgadillo2004EvidenceTT,
  title={Evidence that the photoperiod controls the annual changes in testosterone secretion, testicular and body weight in subtropical male goats.},
  author={Jos{\'e} Alberto Delgadillo and Mar{\'i}a Elena Cortez and Gerardo Duarte and Philippe Chemineau and Beno{\^i}t Malpaux},
  journal={Reproduction, nutrition, development},
  year={2004},
  volume={44 3},
  pages={183-93}
}
The aim of this study was to determine whether the reproductive seasonality of local male goats from subtropical Mexico (26 degrees N) is controlled by photoperiod. The control group (n = 7) remained in an open shed under natural daylight. The two experimental groups (n = 6 each) were placed in light-proof buildings and exposed for 2 years (yr) to alternations of 3 months (mo) of long days and 3 mo of short days. One group was first exposed to long days and the other one to short days. Body and… CONTINUE READING
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