Testis size, sperm characteristics and testosterone concentrations in four species of shrews (Mammalia, Soricidae).

@article{Parapanov2009TestisSS,
  title={Testis size, sperm characteristics and testosterone concentrations in four species of shrews (Mammalia, Soricidae).},
  author={Roumen Parapanov and S{\'e}bastien Nussl{\'e} and Michel Crausaz and Alfred Senn and Jacques Hausser and Peter A. Vogel},
  journal={Animal reproduction science},
  year={2009},
  volume={114 1-3},
  pages={269-78}
}
The aim of this study was to establish and compare the sperm characteristics in four shrew species in the context of the sperm competition hypothesis. As expected, the large relative testis size in promiscuous species was associated with a high number of cauda epididymal spermatozoa and a high concentration of circulating testosterone. In addition, in Sorex and Neomys, species with high intensity of sperm competition, the spermatozoa stored in cauda epididymis were characterized by high… CONTINUE READING