Mate-guarding is an important determinant of male reproductive success in a number of species. Little is known however about the constraints of this behaviour, e.g. the associated energetic costs. We ...

Mate guarding is classified as excessive or unwarranted jealous or protective behavior towards a spouse or mate. This is common among many different species and can be useful to defend territory, ...

We report on likely mixed paternity in a natural population of snow skinks (Niveoscincus mirolepidotus) from alpine Tasmania, Australia. This species is nonterritorial and males guard females after ...

Biologists are offering a new theory for the long-standing mystery of why male lemurs are no larger than females. The theory posits that male lemurs guard their mates just like other primates. But ...

Editor’s note: Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. You can’t hurry love,” the Supremes sang ...

In several species of primates, males often discern when to mate with a female based on cyclical changes in the size and firmness of her sexual swelling - a visual signal of a female's probability to ...