What are the systems of breeding?

Answer 1

California sea lions are highly social, and breed from May to June. When establishing a territory, the males will try to increase their chances of breeding by staying on the rookery for as long as possible. During this time, they will fast, using their blubber as an energy store. Size is a key factor in winning fights as well as waiting. The bigger the male, the more blubber he can store, and the longer he can wait. Before mating begins, females may form "milling" groups of two to 20 individuals. The females in these groups will mount each other and even the territorial male. Eventually, one or two of the females will mate and the milling stops.The territorial and mating system of the California sea lion has been described as similar to a lek system. The females choose their mates rather than the territories where the males are.

A male sea lion can hold his territory for only up to 29 days.Females do not become receptive until 21 days after the pups are born, thus the males do not set up their territories until after the females give birth. There can be as many as 16 females for one male. For adult males, territorial claims occur both on land and underwater. They have even been known to charge divers who enter their underwater territory.

The females have a 12-month reproductive cycle, 9-month actual gestation with a 3-month delayed implantation of the fertilized egg after giving birth in early to mid-June.

Answer 2

Artificial and natural breeding.