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Population surveys of the Devils Hole pupfish began in 1972. [54] Population counts since then have been conducted using the same methods, with scuba diving researchers counting fish starting at depths of 30 m (100 ft) while researchers above the water count the individuals on the shallow shelf. [ 63 ]
The Devils Hole pupfish reached a 25-year high spring count of 191 fish. For years, the fish’s population dwindled, hitting an “all-time low of 35 in 2013,” the National Park Service said in ...
Devils Hole pupfish, Cyprinodon diabolis, from Death Valley National Park. Devils Hole is the only natural habitat of the Devils Hole pupfish, which survives despite the hot, oxygen-poor water. [19] Devils Hole "may be the smallest habitat in the world containing the entire population of a vertebrate species". [4]
Before the mid-1990s, scientists counted between 200 and 250 Devils Hole pupfish each spring. But over the course of about 20 years, the fish's population count dropped to an average of about 90 ...
The Devils Hole pupfish (Cyprinodon diabolis) is a specific species native to Nevada. There are fewer than 200 individuals since 2005. Their population size usually fluctuates between 37 and 400 fish. They are considered one of the world's rarest fish. These fish live in 94 °F (34.4 °C) waters. [12]
The waves disrupted the shallow shelf inside the Devils Hole, the pupfish’s spawning area, knocking most of the organic matter from the shelf into the 500-foot-deep cavern, the NPS said.
With no other natural habitat and a population in the low 200s, the disturbance to the pupfish could mean trouble. "Devils Hole in Death Valley National Park was shaken by an earthquake that ...
The endangered Devil's Hole pupfish population, is sensitive to ground water level changes and regularly monitored by a "Death Valley Scuba Dive Team". Devil's Hole is completely surrounded by the expanded Ash Meadows National Wildlife Refuge; however, pupfish management is still overseen by Death Valley National Park.