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Crayfish usually have limited home range and so they rest, digest, and eliminate their waste, most commonly in the same location each day. Feeding exposes the crayfish to risk of predation, and so feeding behaviour is often rapid and synchronised with feeding processes that reduce such risks — eat, hide, process and eliminate.
The crayfish culinary trend swept mainland China since the late 1990s, and now as the world's largest producer and consumer of crayfish, all of China's crayfish are farmed Procambarus clarkii.
Cambaroides is a genus of freshwater crayfish from eastern Asia (eastern Russia, northeastern China, Korean Peninsula and Japan). Together with Pontastacus, they are the only crayfish native to Asia. Cambaroides contains about six species: [1] [2] [3]
Palaeocambarus is an extinct genus of crayfish discovered in the Yixian Formation in China, with only a single species, P. licenti. It is one of the oldest known fossil crayfish. [1] [2] [3] The genus Cricoidoscelosus is now considered to be a junior synonym. [1]
Astacidae is a family of freshwater crayfish native to Europe, western Asia and western North America. The family is made up of four extant (living) genera: The genera Astacus (which includes the European crayfish), Pontastacus (which includes the Turkish crayfish), and Austropotamobius are all found throughout Europe and parts of western Asia, while Pacifastacus (which includes the signal ...
Cambaroides dauricus is a species of crayfish endemic to north-eastern China, the Korean Peninsula and neighbouring parts of Russia. [1]
The other superfamily of crayfish, Parastacoidea, lives in the Southern Hemisphere. Astacoidea consists of three families: Astacidae (from Europe and western North America), Cambaridae (from eastern North America), and Cambaroididae (from eastern Asia). Crayfish are closely related to lobsters, as shown in the simplified cladogram below: [1] [2 ...
Overstocking of crayfish can lead to higher rates of mortality, which is associated with higher rates of cannibalism and increased competition for shelter and food. [9] New Zealand Clearwater Crayfish Ltd farm grows the northern koura species P. planifrons using a gravity-fed system with pond culture and raceways. A key step in this koura farm ...