The amount of sperm released decreased sharply with each mating during a single day, reducing the males' fertilization rate.

The animal kingdom can get pretty weird when it comes to sex and relationships. Different creatures have evolved all sorts of ...

The study was published in November in the Proceedings of the National Academy of Science. Purdue animal scientist Bill Muir and biologist Rick Howard used minute Japanese fish called medaka to ...

For any animal, releasing sperm cells requires a bit of time and energy. Using up so much energy can keep them from the other ...

Working out the kinks of mating in the animal kingdom helps to gain insights into the survival of species. Among animals that ...

Osaka Metropolitan University researchers have uncovered a daily mating capacity for medaka, providing important insights ...

Compared with other fish, sex determination in medaka has been closely scrutinized. Homologous targets of Sry — the mammalian gene that directs male development — are known in medaka ...

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 ...

Three major approaches were taken: large scale screening of mutant Medaka fish defective in embryogenesis; a Wnt family-focused in-depth investigation of signaling systems; and a modernized revisit to ...

Working out the kinks of mating in the animal kingdom helps to gain insights into the survival of species. Among animals that have multiple partners ...