Search results
Results from the WOW.Com Content Network
Steller's sea cow (Hydrodamalis gigas) is an extinct sirenian described by Georg Wilhelm Steller in 1741. At that time, it was found only around the Commander Islands in the Bering Sea between Alaska and Russia; its range extended across the North Pacific during the Pleistocene epoch, and likely contracted to such an extreme degree due to the glacial cycle.
The recently extinct Steller's sea cow was the largest known sirenian to have lived, reaching lengths of 10 metres (33 feet) and weights of 5 to 10 tonnes (5.5 to 11.0 short tons). [ 2 ] Sirenians have a large, fusiform body which reduces drag through the water and heavy bones that act as ballast to counteract the buoyancy of their blubber .
It included the Steller's sea cow (Hydrodamalis gigas), the Cuesta sea cow (Hydrodamalis cuestae), and the Takikawa sea cow (Hydrodamalis spissa). Pages in category "Hydrodamalis" The following 4 pages are in this category, out of 4 total.
The dugong (/ ˈ d (j) uː ɡ ɒ ŋ /; Dugong dugon) is a marine mammal.It is one of four living species of the order Sirenia, which also includes three species of manatees.It is the only living representative of the once-diverse family Dugongidae; its closest modern relative, Steller's sea cow (Hydrodamalis gigas), was hunted to extinction in the 18th century.
They reached up to 9 metres (30 ft) in length, making the Steller's sea cow among the largest mammals other than whales to have existed in the Holocene epoch. [3] Steller's sea cow was first described by Georg Wilhelm Steller, [4] Cuesta by Daryl Domning, [5] and Takikawa by Hitoshi Furusawa. [2]
Other remains in North America have been dated to 8640-8500 BCE. [4] Western bison: Bison occidentalis: Eastern Beringia: Another transitional form to American bison that originated in a second dispersal of steppe bison across Beringia, and persisted in Alaska until around 220 CE. [51] Steppe bison: Bison priscus: Northern Eurasia and North America
The Steller's sea cow (Hydrodamalis gigas) was hunted to extinction by 1768, while the genus Dusisiren is known from fossils dating from the middle Miocene to early Pliocene. [ 1 ] References
Due to this great demand and worth of the sea otters pelt, the Russian-America Company (RAC) annual expenses was around 1000,000 rubles each year and profited over 500,000 rubles per year. [130] The fur of the Californian southern sea otter, E. l. nereis, was less highly prized and thus less profitable.