IUCN/The World Conservation Union lists the marine, giant, southern river, and sea otters are listed as "endangered" (species has a very high risk of extinction).
41 years later and counting, their conservation status remains unchanged and their future uncertain. Sea otter population growth has stalled in recent years and many hurdles for full population recovery remain. There are only about 3,000 southern sea otters left in the wild today.
Among California sea otters, a protected species whose numbers are closely monitored, Toxoplasma infections contribute to the deaths of 8 percent of otters that are found dead, and is the primary cause of death in 3 percent.
Conservation Status: Otters are strictly protected by the Wildlife and Countryside Act (1981) and cannot be killed, kept or sold (even stuffed specimens) except under licence. Otters require clean rivers with an abundant, varied supply of food and plenty of bank-side vegetation offering secluded sites for their holts.
Sea otters were hunted extensively for their luxurious pelts during the 18th and 19th centuries, significantly reducing the original population whose numbers were estimated by historians to have been around 16,000 animals.
Rosa helped raise 15 orphaned sea otter pups before she retired in 2019, according to the aquarium.
Are River Otters endangered? They are of least concern in California. They are not federally endangered because they range over all of North America from the Arctic Circle to Mexico, although they are considered threatened or endangered in some states where their numbers have significantly dropped.
Why are southern sea otters making a slow comeback and what factors can threaten this recovery? -Female sea otters cannot reproduce fastly, because they cannot reproduce until they are 2 to 5 years old, and stop reproducing when they are 15. They are K- strategists, they have on average only one pup per year.
12 Ways You Can Help Sea Otters
- Reduce, reuse, and recycle whenever you can.
- Dispose of hazardous wastes properly.
- Grow a garden.
- Use nontoxic household cleaning products.
- Don't litter or dump materials into storm drains.
- Pick up after your pets.
- Use less water.
- Purchase sustainable, recycled, biodegradable goods.
In the United States Otters are protected under the Endangered Species Act. This is due to the fact that the conditions they live under could be compromised easily and that could lead to a significant reduction in their numbers in very little time.
In 1977, the southern sea otter was listed as “threatened†under the federal Endangered Species Act. Additionally, this species is protected under California state law as a “fully protected mammal†and by the Marine Mammal Protection Act.
Some popular poisons for otters are chlorophacinone or zinc phosphide and warfarin. EPA recommends the use of these rodenticides with bait by making sure that the baits are not harmful for dogs and small children if they accidentally put them in their mouths.
The only predator that they have to worry about is the killer whale. However, these whales find Otters to be a great meal. Approximately 40,000 of them are consumed annually in this area. In California thousands of them are consumed annually by White Sharks.
Otters are scared of dogs, especially larger ones, and will view them as predators.
All otter species have been hunted for their thick, velvety fur. Excessive fur trapping during the 19th and 20th centuries caused severe declines in many populations. By then the species had been nearly wiped out; probably only 1,000 to 2,000 survived worldwide. Oil spills are devastating to sea otter population.
Otters are voracious predators, close to being apex [top predator] in most places where they live.
Bald eagles often prove to be formidable predators. I have witnessed young bald eagles in their attempts at taking otters, though I have never seen a successful hunt.
Many species of otters, such as the North American river and giant river otter, have strong teeth, which they use to ward off predators. According to Kids Planet, sea otters escape from predators, like killer whales and giant sharks, by hiding in kelp beds, coming up on land or fleeing.
Sea otters are apex predators of the marine nearshore environment. They alter community dynamics by eating sea urchins, grazers that can decimate kelp beds if not kept in check.
The rapid decline in sea otter abundance in southwest Alaska has been attributed to an increase in predation by killer whales. In 2001, the US Fish and Wildlife Service (USFWS) designated the Aleutian Islands population of northern sea otter as a candidate species for listing under the Endangered Species Act (ESA).
The population declined to a uniformly low density in the archipelago, suggesting a common and geographically widespread cause. These data are in general agreement with the hypothesis of increased predation on sea otters.
The sea otter (Enhydra lutris) is a marine mammal native to the coasts of the northern and eastern North Pacific Ocean.
| Sea otter |
|---|
| Family: | Mustelidae |
| Subfamily: | Lutrinae |
| Genus: | Enhydra |
| Species: | E. lutris |
Because they rely on their fur as insulation against the cold, sea otters are extremely vulnerable to oil spills. More recently, the Selendang Ayu oil spill in the Aleutian Islands in December 2004 killed numerous individuals in this vulnerable sea otter population.
Native and localised. They are a priority species in the UK Biodiversity Action Plan and are classified as Near Threatened on the IUCN Red List (2004). They are fully protected in the UK under Schedule 5 of the Wildlife and Countryside Act 1981.
The current total population is estimated to be somewhere between 1000-5000 individuals.
Some factors that are keeping the otter population from keeping its historical levels are dependent-limiting factors such as predation from mainly great white sharks and some independent limiting factors are human activity because humans like to hunt otters.
