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They do consume some small types of fish but not to the same degree as other species of Otters do. In California's Monterey Bay, where scientists observed otters trying to copulate with the week-old bodies of dead baby seals, there are far more male otters than females. The gestation period lasts for six months, and females nearly always give birth to a single live pup, although twinning does occur. Because sea otters do not have any insulating fat, the fur is responsible for heat maintenance. Sea otters ( Enhydra lutris ) have the highest mass-specific metabolic rate of any marine mammal, which is superimposed on the inherently high costs of reproduction and lactation in adult females. These combined energetic demands have been implicated in the poor body condition and increased mortality of female sea otters nearing the end of lactation along the central California coast. There is no specific breeding season in otters, so mating between animals occurs at any time of the year. This means that, when they are removed, the rest of the ecosystem collapses. ... for males and about 7 km (4.3 mi.) Females are slightly smaller. The animals that they prey on devour kelp forests. On land, young sea otters may face attack from bears and coyotes. The 13 otter species are members of the Mustelidae, or weasel, family and live in and out of water.For example, river otters reside along streams and waterways in freshwater areas within North America, and endangered sea otter inhabit the coasts along the Northern Pacific Ocean. Sea Otters feed on very tough, hard-to-open armored creatures such as sea urchins, abalone, and mussels, and often use rocks to open or crush them. for females. However, sea otters also have a different and exceptional type of hair called vibrissae, commonly known as whiskers. They feed on crustaceans such as crabs and shrimp, as well as mollusks and fish. How many pups do sea otters have? The sea otters at the Vancouver Aquarium were rescued when they were just babies. By plane By boat . The main part of the diet for the Sea Otter consists of mollusks and crustaceans. In order to capture food, sea otters dive to the bottom in 5 to 250 feet (1.5 to 75 meters) of water. Males may breed with more than one female during the year. Dedicated staff had to bottle-feed and groom them until they learned how to do it themselves. They have visible ears, swim belly down, use webbed feet to paddle, and move swiftly on land and water. “You can see these females getting skinnier and skinnier,” as they raise their pups, said Nicole Thometz, of the University of California, Santa Cruz. River otters live primarily in freshwater, though they do swim and hunt in seawater. Otherwise they are going to get bored soon. In fact, sea otters eating is what they're best known for—besides being extremely cute. The density of body hairs of sea otters is one of the highest for any mammal, up to 150,000 hairs/sq cm. A male's range often overlaps that of one or more females. pinnipeds are also much larger than the otters, with steller sea lion females averaging 300 kg (still MUCH smaller than a 4000 kg killer whale) 4. Sea Otters as a Keystone Species. Think there's nothing you can do to help protect our Sea Otters in 1 Minute? Their measurements vary depending on the sex. Sea otters naturally thrive in nearshore habitats. So you really can’t blame the moms. How long do otters live? Sea Otter Lifespan: The lifespan of the male sea otters is about 10 to 15 years while the females live for about 15 to 20 years. As prey, otters provide a great source of nutrients to animals that hunt them for food. Unlike most marine mammals, sea otters do not have a blubber layer to help keep them warm in the chilled waters of the Pacific. Kamchatka beavers do not form permanent pairs, males do not compete with each other and can mate with several females. They are diurnal species and tend to forage for food during the initial hours of the daybreak. Sea otter fur is the densest of all mammals, with about 100,000 hairs per square centimeter. Otters do not usually fly. Sea otters have a high metabolic rate (that is, they use a high amount of energy) that is 2-3 times that of other mammals their size. Sex and violence. In some areas, a female Alaska sea otter's home range may include 8 to 16 km (5-10 mi.) Sea otter males pursue the females relentlessly during mating season. A parasite called toxoplasmosis. Sea otters are what is known as a keystone species. Sea otters (genus Enhydra) are found in coastal waters of the North Pacific, ... Cape clawless otters do not dig burrows. In their role as predators, otters help regulate the local population of the organisms they consume. Sea otters use this thick, dense coat of hair to stay warm since they don’t have blubber like other marine mammals. Therefore, sea otters are crucial to maintaining kelp forest levels, which provide cover and food for many marine animals. They do mainly feed during the day but many of the females with pups tend to hunt at night instead. Why do we capture sea otters? They are often found to rest during the middle part of … Otters are predatory animals. Mating Behavior. Diet. The sea urchins destroy these underwater kelp beds and so, if the sea otters do not prey on them, they would damage these ecosystems. Pup stays with Mum for 6 months Pup has special baby fur for 13 weeks which makes it too buoyant to dive . A female sea otter matures at the age of 3 to 4 years while the males reach maturity at 5 years. Animals that live in captivity, most of the time only get their 'meat food' already dead. Here at the Aquarium, our sea otters are southern, or California, sea otters. Using this information, apply optimal foraging theory and a cost-benefit approach to analyzing animal behaviour to … They eat 40 plus different types of species such as clams, urchins, and snails. Mating is polygynous—one male breeds with all the females in its breeding territory. Wild sea otters typically have a lifespan between 15 and 20 years. Sea otters are the smallest marine mammals and are a part of the weasel or mustelid family. Now they’re thriving in their Aquarium habitat. Sea otters reproduce sexually and that only occurs when the females are in estrus. Sea otters also face another threat that is invisible to the naked eye. Even healthy sea otters are contracting this parasite. Otters weigh 35-90 pounds (males weigh more than females). Case study: Sea Otters →Crabs → Sea Slugs → Micro Algae → Eelgrass A new trophic cascade involving sea otters was recently discovered in a Central California estuary. Back to the top. Though there are many other interactions between sea otters and their prey species, the best example of this effect is the sea urchin. How do we capture sea otters? How do we count sea otters? In California, females reach 35-60 pounds, males 90 pounds, and pups when born are around 3-5 pounds. Otters (both sea and river otters) play a notable role in the animal food chain. Sea otters live for approximately 15 to 20 years. Marine otters occupy the intertidal zone that covers the first 100–150 metres (roughly 330–500 feet) of coastal water and about 30 metres (100 feet) inland. River otters also reach sexual maturity earlier and are typically able to reproduce sooner than sea otters. These carnivores eat a variety of seafood, such as fish, frogs, crayfish, crabs and mollusks. Sea otters have circular, furry faces with short noses, rounded eyes and ears, and … Sea otters breed throughout the year. This is especially problematic in Monterey Bay, where there are more male sea otters than females. A male river otter appears to approach females indiscriminately until it finds one that is receptive. • Males 15 yrs; females 20 yrs • Age them by teeth . Otters do have lots of energy, and need their hunt moments to make work off that energy. They were so young that they didn’t know how to eat by themselves or groom themselves yet. The most notable physical difference between this subspecies and its northern cousins is size. Sea otters mainly eat sea urchins, crabs, clams, mussels, octopus, other marine invertebrates, and fish. River otters will achieve maturity between the ages of two and three, while female sea otters mature between ages three and five, and males even later between ages five and seven. of coastline. Also Know, do orcas eat sea otters? So, a 50-pound otter would need to eat about 10-15 pounds of food per day. Main Characteristics Of The Sea Otters Anatomy. Adult males weight between 22 and 45 kilograms and measure from 1.2 to 1.5 meters.On the other hand the adult females usually weigh between 14 and 33 kilograms, and their length varies from 1 to 1.4 meters.. That means that they eat other animals. Pups . This parasite, which was only known to reproduce in cats, can cause fatal brain infections and can have devastating effects on the sea otter population. They have been known to find and keep a favorite rock of theirs. North American, spot-necked, smooth, and marine otters in North American zoological facilities mate during winter and spring. The sea otters have a flexible skeleton and their face is small and round. Sea otters eat A LOT of food. An otter in the sea is usually not a Sea Otter!The Sea Otter (Enhydra lutris) is our smallest marine mammal, but is one of the largest of the world's 13 otter species - males weigh up to 45 kilograms and reach 148 centimetres in length. But if sea otter elders in Checleset Bay told floating bedtime stories to modern day pups, they might tell of their ancestors’ bizarre flying adventure. Sea otters play a vital role in the health and stability of the nearshore marine ecosystem as a keystone species; Sea otter fur is the densest of any mammal at about 1 million hairs per square inch (We have 100,000 hairs on our entire head). Sea otters eat about 20-30% of their body weight each day. The reason for this skew in the population is unclear, but it leaves male sea otters in a bind. Whereas a female southern sea otter grows up to 50 pounds, a female northern sea otter can weigh up to 70 pounds. In natural conditions, sea otters live 8-11 years, in captivity – about 20 years. Is invisible to the same degree as other species of otters do to dive kelp levels. Up to 70 pounds 's home range may include 8 to 16 km ( 4.3 mi. it.! 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