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The region rostral to the cephalic groove, which separates the head and thorax region, is characterized by the presence of eyes, antennae and claws while the region caudal contains four pairs of walking legs. This is the crayfish's primary mode of locomotion. [2] [3] The abdominal section of the crayfish is divided into seven segments. These ...
It is commonly called crayfish in Australia and New Zealand and kōura in Māori. [3] They resemble lobsters , but lack the large characteristic pincers on the first pair of walking legs. Spiny rock lobsters are carnivorous , leaving their rock cover to venture out to feed during the night.
Crayfish can be cooked more humanely by first freezing them unconscious for a few hours, then destroying the central nervous system along their abdomen by cutting the crayfish lengthwise with a long knife down the center of the crayfish before cooking it. [46] Global crayfish production is centered in Asia, primarily China.
A 2014 study [72] on crayfish (Procambarus clarkii) tested their responses in a fear paradigm, the elevated plus maze in which animals choose to walk on an elevated cross which offers both aversive and preferable conditions (in this case, two arms were lit and two were dark). Crayfish which experienced an electric shock displayed enhanced ...
Faxonius limosus, synonym Orconectes limosus, [3] is a species of crayfish in the family Cambaridae. It is native to the east coast of North America, from Quebec [2] to the lower James River, Virginia, but has also been introduced to Europe. [1] It is known commonly as the spinycheek crayfish [1] [5] or Kamberkrebs in German.
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 ...
Their walking legs are blue with chelae ranging in colour from light blue to a blue green. Some ways to differentiate the Guyandotte River crayfish from the Big Sandy crayfish include the narrower rostrum and claw set of the Big Sandy crayfish. Guyandotte River crayfish also have a lateral impression at the bottom of the stationary claw. [4]
Faxonius shoupi, the Nashville crayfish, is a freshwater crustacean native to the Mill Creek Basin in Nashville, Tennessee. [2] Prior to August 2017, the species was called Orconectes shoupi . [ 4 ] Faxonius shoupi is protected under the Endangered Species Act (ESA) as an endangered species.