Why too much sex isn't good in the long run

when you're a ram, that is.

By | February 14, 2001

The largest and most well-endowed male sheep can copulate as many as 13 times a day, but in the end they can't compete with their smaller counterparts, according to a report in the 8 February Nature.

From a study of feral Soay sheep in the wild, Brian Preston of the University of Stirling and his colleagues found that although large rams are initially more successful at mating, and father more lambs overall, they eventually become depleted of sperm (Nature 2001, 409:681-682). Towards the end of the breeding season it is the smaller males who, having exerted themselves less, sire more lambs. The scientists also found an effect of copulation frequency on sperm quality. Rams that copulate more frequently produce fewer healthy sperm at the end of the breeding season. It seems too much sex can have ram-ifications.

Advertisement

Popular Now

  1. Next Generation: Nanotube Scaffolds Reconnect Spinal Neurons
  2. Mapping the Human Connectome
    Daily News Mapping the Human Connectome

    A new map of human cortex combines data from multiple imaging modalities and comprises 180 distinct regions.

  3. Will Organs-in-a-Dish Ever Replace Animal Models?
  4. Your Office Has a Distinct Microbiome
RayBiotech