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This water mold was transmitted to Europe when North American species of crayfish were introduced. [40] Species of the genus Astacus are particularly susceptible to infection, allowing the plague-coevolved signal crayfish (native to western North America) to invade parts of Europe. [41] Acid rain can cause problems for crayfish across the world.
The genus Cambarus is the second largest freshwater crayfish genus inhabiting the Northern Hemisphere, with only sixty fewer species than the genus Procambarus. [2] Though Cambarus are varied across species, the two terminal elements that make up the male form I gonopod form ninety degree angles with the central appendage, allowing for their identification.
Cambarus bartonii is a species of crayfish native to eastern North America, where it is called the common crayfish [3] or Appalachian brook crayfish. [2]Cambarus bartonii was the first crayfish to be described from North America, when Johan Christian Fabricius published it under the name Astacus bartonii in his 1798 work Supplementum entomologiae systematicae. [4]
The Cambaridae are the largest of the four families of freshwater crayfish, with over 400 species. [1] Most of the species in the family are native to the United States east of the Great Divide and Mexico, but fewer range north to Canada, and south to Guatemala and Honduras. Three live on the island of Cuba.
It is an introduced species in adjacent regions, including Massachusetts, Vermont, and Ontario in Canada. [1] It is known commonly as the Allegheny crayfish [2] and the obscure crayfish. This species lives in slow-moving waterways and pools with rocky substrates, where it hides beneath rocks. [1] It also burrows into the substrate. [2]
Faxonius propinquus, the Northern clearwater crayfish, is a species of crayfish in the family Cambaridae found in Ontario, Quebec and the Northeastern and Midwestern United States. [ 3 ] [ 2 ] References
Procambarus acutus, the white river crayfish, is a species of crayfish in the family Cambaridae. It is found in North America and Europe. [3] [4] [1] [5] The IUCN conservation status of Procambarus acutus is "LC", least concern, with no immediate threat to the species' survival. The IUCN status was reviewed in 2010.
Pontastacus leptodactylus, [2] the Danube crayfish, [3] Galician crayfish, [3] Turkish crayfish [4] or narrow-clawed crayfish, is a relatively large and economically important species of crayfish native to fresh and brackish waters in eastern Europe and western Asia, mainly in the Pontic–Caspian region, among others including the basins of the Black Sea, and the Danube, Dnieper, Don and ...