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- Wildscreen Arkive – Greenland shark
- WebMD – Secretin
- Gulf of Maine analysis Institute – Greenland shark
- Animal Diversity Internet – Greenland shark
- Canadian Shark Analysis Laboratory – Greenland Shark
- Florida Museum of Natural History – Greenland shark
Greenland shark, (Somniosus microcephalus), person in the sleeper shark family Somniosidae (order Squaliformes, that also includes the dogfish family members, Squalidae) this is the longest-living vertebrate known. The types is mainly based in the cold-water environments regarding the Arctic Ocean and North Atlantic, from Baffin Bay eastward to your Barents Sea, but its range additionally runs southward into the North Sea together with waters right beside the Eastern Seaboard regarding the united states of america. Bulky, having a curved snout, little fins in accordance with human body size, and grey to brown coloration, Greenland sharks are comparable to spiny dogfish (Squalus acanthias)
except they lack a back at the second dorsal fin and in most cases usually the one in the very very very very first fin that is dorsal.
The Greenland shark is amongst the biggest cartilaginous fishes. It could achieve a size of 7 metres (23 foot) and a fat of 1,025 kg (2,260 pounds) whenever completely grown, but the majority are between 2 and 4 metres (6.5 and 13 foot). Minimal is famous, but, exactly how the types reproduces. Females are believed to achieve maturity that is sexual they surpass the 4-metre (13-foot) mark in total, which does take approximately 150 years to obtain. They have been ovoviviparous (that is, eggs are retained in the physical human anatomy until they hatch) and create on average 10 offspring at any given time. The kind, quantity, and length of parental care the receive that is young unknown, but researchers speculate that, like other shark types, Greenland sharks are separate from delivery. No other vertebrate known has a life time so long as this species; radiocarbon relationship of isotopes in the sharkвЂ™s eye-lens suggests that are nuclei the earliest Greenland sharks could be significantly more than 500 years old.
Greenland sharks are seldom experienced by people. These are generally considered to choose colder, much much deeper surroundings but could be discovered ranging from the ocean area and depths of 2,200 meters (about 7,200 legs). Greenland sharks are slow-moving, typically swimming at prices of significantly less than 3 kilometer (about look at tids site 1.9 kilometers) each hour. These are typically carnivorous, and their diet is generally comprised of many different kinds of fishes, including smaller sharks, eels, flounders, and sculpins. Crustaceans, seabirds, and carrionвЂ”as well as terrestrial animals (such as for instance horses and reindeer) that probably dropped through the iceвЂ”have been present in belly analyses for the types. Greenland sharks aren’t considered dangerous to people, in component simply because they are now living in areas where individuals don’t typically swim; the only known report of the feasible assault by a Greenland shark on a person dates to 1859.
Greenland sharks are believed to be a species that are near-threatened the Global Union for Conservation of Nature.
The types ended up being valued for the liver oil; about 114 litres (30 gallons) of liver oil are available from a big specimen (see additionally fish oil). (even though flesh associated with the Greenland shark could be consumed, it really is toxic unless precisely washed and dried out or over over repeatedly boiled ahead of consumption.) Greenland sharks had been fished commercially through the nineteenth century until 1960. Norway persecuted Greenland sharks through the 1970s, simply because they had been regarded as being a nuisance that threatened other fisheries. Into the 1900s that are early numerous as 30,000 Greenland sharks had been caught per year. In totime’s day the yearly take is far smaller; small-scale subsistence fisheries in the Arctic harvest less than 100 people yearly, and approximately 1,200 are caught unintentionally in fishing trawls.