Reproduction
The breeding system of the Antarctic fur seal is polygynous, and dominant breeding males mate with as many as 20 females during a successful season. Adult males establish breeding territories on beaches in late October to mid November, preferably just along the shoreline. They are fiercely territorial during the breeding season and aggressively defend access to estrous females from other males, mostly with stereotyped physical displays, lunges, and vocalizations. These fights can be very damaging. Many bulls die from their wounds. Males may fast during the breeding season for six to eight weeks, losing up to 1.5 kg a day. The gestation period lasts about a year. Females give birth to a single pup between mid November and late December. They mate about 7 to 10 days later and then begin a series of foraging trips at sea that lasts for several days each. In between, they are ashore for one to several days to nurse their pups. Pups are weaned at about four months old.
Read more about this topic: Antarctic Fur Seal
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