Poultry researchers found that domestic cockerels “allocate sperm differently according to the quality of copulation”; new mates tend to receive more sperm than familiar partners, and the roosters increase their sperm deposits in the presence of other males.
Poultry researchers found that domestic cockerels “allocate sperm differently according to the quality of copulation”; new mates tend to receive more sperm than familiar partners, and the roosters increase their sperm deposits in the presence of other males.
