Why are northern river sharks endangered?
Why are northern river sharks endangered?
Because of its low natural abundance, limited distribution, stringent habitat requirements, and susceptibility to various human-caused threats, the IUCN has assessed the northern river shark as Vulnerable.
How rare is the Glyphis shark?
The Northern River Shark (Glyphis garricki) is one of the rarest species of shark in the world. It is known only from a small number of locations in Western Australia, the Northern Territory and Papua New Guinea. Discovered in Australia in 1986, only 36 specimens have been recorded here since.
Why is the Speartooth shark endangered?
The Speartooth shark is threatened by bycatch in commercial and recreational fishing activities and by possible habitat degradation which is decreasing their population.
What is the rarest shark ever?
Speartooth Shark – Endangered The speartooth shark (Glyphis glyphis) is one of the rarest shark species on earth, found only in tropical rivers in New Guinea and northern Australia. The speartooth shark is not targeted by fisheries for its meat or fins, but it may be accidentally caught in fishing nets as by-catch.
Can sharks live in freshwater lakes?
Freshwater sharks are sharks able to live in freshwater lakes and rivers, including: the river sharks, Glyphis, true freshwater sharks found in fresh and brackish water in Asia and Australia.
Why is the population of the northern river shark decreasing?
Population of the Northern river shark is decreasing due to illegal gillnetting or hook and line fishing in the river habits With small eyes and slender teeth, the head is wide and flattened with a long broadly rounded snout, it is often mistaken for bull sharks.
How many northern river sharks are there in the world?
The Northern river shark is primarily a fish eater that have been adapted to living in waters with poor visibility. There are less than 250 adults northern river sharks in the world. Because of this, the species is considered critically endangered. Do you have images or videos of Northern River Sharks?
What does the northern river shark do?
The Northern River Shark hunts fish in water with poor visibility and they move to and from feeding areas with the tide The Northern River Shark is piscivorous and they prey on small bony fish.
Who discovered the northern river shark?
The first known specimens of the northern river shark, two newborn males from Papua New Guinea, were discovered by New Zealand ichthyologist Jack Garrick, after whom the species was eventually named. This shark was referred to as “Glyphis sp.
