The Galápagos fur seal (Arctocephalus galapagoensis ) is one of eight seals in the genus Arctocephalus and one of nine seals in the subfamily Arctocephalinae. It is the smallest of all of the eared seals. They are endemic to the Galápagos Islands in the eastern Pacific. The total estimated population as of 1970 was said to be about 30,000, although the population has been said to be on the decline since the 1980s due to environmental factors such as pollution, disease, invasive species, and their limited territory. Due to the population having been historically vulnerable to hunting, the Galápagos fur seal has been protected by the Ecuadorian government since 1934
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NocturnalNocturnality is an animal behavior characterized by being active during the night and sleeping during the day. The common adjective is "nocturnal",...
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CarnivoreA carnivore meaning 'meat eater' is an organism that derives its energy and nutrient requirements from a diet consisting mainly or exclusively of a...
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MolluscivoreA molluscivore is a carnivorous animal that specializes in feeding on molluscs such as gastropods, bivalves, brachiopods, and cephalopods. Known mo...
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PiscivoresA piscivore is a carnivorous animal that eats primarily fish. Piscivorous is equivalent to the Greek-derived word ichthyophagous. Fish were the die...
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SemiaquaticSemiaquatic animals are those that are primarily or partly terrestrial but that spend a large amount of time swimming or otherwise occupied in wate...
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PrecocialPrecocial species are those in which the young are relatively mature and mobile from the moment of birth or hatching. Precocial species are normall...
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Island endemicIsland endemic animals are found in a single defined geographic location, such as an island. Animals or organisms that are indigenous to a place ar...
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NatatorialNatatorial animals are those adapted for swimming. Some fish use their pectoral fins as the primary means of locomotion, sometimes termed labriform...
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TerritorialA territory is a sociographical area that which an animal consistently defends against the conspecific competition (or, occasionally, against anima...
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TerrestrialTerrestrial animals are animals that live predominantly or entirely on land (e.g., cats, ants, snails), as compared with aquatic animals, which liv...
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CongregatoryCongregatory animals tend to gather in large numbers in specific areas as breeding colonies, for feeding, or for resting.
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ViviparousAmong animals, viviparity is the development of the embryo inside the body of the parent. The term 'viviparity' and its adjective form 'viviparous'...
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PolygynyPolygyny is a mating system in which one male lives and mates with multiple females but each female only mates with a single male.
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ColonialColonial animals live in large aggregations composed of two or more conspecific individuals in close association with or connected to, one another....
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Not a migrantAnimals that do not make seasonal movements and stay in their native home ranges all year round are called not migrants or residents.
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starts withThe smallest of the pinnipeds is the Galápagos fur seal. It has a short, pointed muzzle, a little, button-like nose and rather large eyes. The coat of this animal varies from dark brown to dark gray, with longer light-tipped guard hairs that create a grizzled appearance. Males also have a mane with slightly longer hairs, that go from the top of their head to their shoulders. The muzzle and also the fur of the underside are paler, with females and adolescents having a rusty-tan belly and a pale grayish-tan chest. The flippers are blackish. The pups are blackish-brown, though sometimes they have whitish or grayish margins around the nose and mouth.
This species is native to the Galápagos Islands, and the main colonies inhabit the western islands, with Isla Isabela and Isla Fernandina being the most populated. A colony of these seals has recently been discovered on Isla Foca in northern Peru. When in the Pacific Ocean’s deep waters they trail the Humboldt Current. When ashore, the Galápagos fur seal prefers rocky areas where it can shelter from the sun between large boulders and under ledges.
Galápagos fur seals are nocturnal feeders and make foraging trips that usually last about 16 hours. Their average dive takes them down 10 to 30 meters. On land they live together in large groups, divided up by the males’ attempts to establish territories, which can be as large as 200 square meters. Within these territories, females are usually found in groups numbering 6 to 10. Galápagos fur seals live in a mainly tropical environment and are a non-migratory species. They spend up to 30% of their time on land and subsequently have many behaviors that avoid the heat of the sun, including lying in shade next to boulders, under lava ledges and in caves, and making trips to the sea.
Galápagos fur seals eat fish, octopus, and squid.
These seals are polygynous, a single male mating with multiple females. The males will establish territories and defend their group of females. One male may mate with between 6 and 10 females that are located within his territory. Breeding occurs from August to November. Gestation lasts for about 12 months, with delayed implantation (when the embryo, rather than developing, is maintained in a dormant state, which lengthens the normal gestation period), and a single pup is born. The pups begin to make ventures into the ocean at the age of 6 months and start to find their own food at 12 months. However, the young seals continue to rely on their mother’s milk as a main form of nourishment until around 2 or 3 years old, when they are weaned and become independent. Females reach sexual maturity between 3 and 5 years of age, and males take slightly longer, from 7 to 10 years, to gain sexual maturity and become big enough to defend their territory.
El Nino (when the temperature of the surface water of the equatorial Pacific Ocean fluctuates, having a strong impact on the climate) greatly affects this species, as it causes the warming of the ocean and thus reduces marine productivity and food sources, which makes the mother seal neglect her pup and wean it too soon, which can mean that the pup starves. Galápagos fur seals also suffer from oil spills and other pollution of their habitat. They are further threatened by natural predators, particularly feral dogs on the islands where they live.
According to the IUCN Red List, the Galápagos fur seal total population size is estimated at about 10,000-15,000 individuals. Their numbers are decreasing today and this species is classified as Endangered (EN).
Social animals are those animals that interact highly with other animals, usually of their own species (conspecifics), to the point of having a rec...