Overview

Cape Fur Seal

Cape fur seals (Arctocephalus pusillus pusillus) are robust marine mammals with thick, dense fur, which is dark brown to black in males and lighter brown or gray in females. Their fur is made up of a dense underfur layer and a top layer of guard hairs, which provides insulation in cold water.

 

Habitat

These seals are primarily marine, spending much of their time at sea hunting for food. They haul out on rocky shores, sandy beaches, and offshore islands for resting, breeding, and molting. They prefer areas with easy access to deep water for foraging.


Size
  • Males:
    • Length: Up to 2.3 meters (7.5 feet)
    • Weight: Between 200 to 360 kg (440 to 790 lbs)
  • Females:
    • Length: Around 1.2 to 1.8 meters (4 to 6 feet)
    • Weight: Between 75 to 120 kg (165 to 265 lbs)

Males are generally much larger and heavier than females, which is typical among many pinniped species. The size difference is also reflected in their behavior, with males being more dominant, especially during the breeding season when they defend territories.


Offspring

Breeding season occurs between late October and early January. During this time, males arrive at the breeding sites first to establish territories, which they defend aggressively against other males. Females arrive shortly after, giving birth to a single pup from the previous year’s mating season.

  • Pups: Cape fur seal pups are born with a black coat, which they begin to molt after a few months to reveal the lighter brown juvenile fur. Pups are weaned after about 6 to 12 months, depending on food availability.
  • Mating: Females mate again shortly after giving birth, ensuring a continuous cycle of reproduction. Delayed implantation occurs, where the fertilized egg remains dormant for several months before developing, aligning birth with the next breeding season.

Behavior

Cape fur seals are social animals, often seen in large colonies, especially during the breeding season. They are excellent swimmers and can travel long distances in search of food. Their social structure is hierarchical, with dominant males establishing and defending territories during the breeding season.


Diet

Cape fur seals are opportunistic feeders, primarily preying on fish, squid, and crustaceans. Their diet varies depending on the availability of prey in their environment. They are known to dive to depths of up to 200 meters (660 feet) to hunt, although most of their dives are shallower.

 

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