Category: Book Excerpts
Rats (superfamily Muroidea) have a well-studied mating system that often involves males becoming sexually satiated. This means that they literally get tapped out of sperm
As opposed to the rodents who experience facultative diapause, carnivore moms experience obligate diapause. Obligately diapausing mothers experience a period of embryonic inactivity each time
In many anuran (frog and toad) species, females have a sperm-storage organ (a spermatheca) that enables them to keep sperm for long periods of time.