Share For any animal, releasing sperm cells requires a bit of time and energy. Using up so much energy can keep them from the other required work of survival, including finding food and water or sleeping. But just what are the upper limits of gamete production? For a tiny fish called the medaka (Oryzias latipes), males have a mating capacity of 19 times per day. The findings are detailed in a study published January 8 in the journal Royal Society Open Science. Get the Popular Science newsletter Breakthroughs, discoveries, and…
