The native range of P. clarkii is along the Gulf Coast from northern Mexico to the Florida panhandle, as well as inland, to southern Illinois and Ohio. It has also been introduced, sometimes deliberately, outside its natural range to countries in Asia, Africa, Europe and elsewhere in the Americas. In northern Europe,
the populations are self maintaining but not expanding, while in southern Europe, P. clarkii is multiplying and actively colonising new territory, at the expense of the native crayfish, Astacus astacus and Austropotamobius spp.. Individuals are reported to be able to cross many miles of relatively dry ground, especially in wet seasons, although the aquarium trade and anglers may have hastened the spread in some areas (it is believed that anglers using P. clarkii as bait introduced it to the American state of Washington). Attempts have also been made to use P. clarkii as a biological control organism, to reduce levels of the snails involved in the life cycle of schistosomiasis, leading to the dispersal of P. clarkii in, for instance, Kenya.
P. clarkii is most commonly found in warm fresh water, such as slowly-flowing rivers, marshes, reservoirs, irrigation systems and rice paddies. It is considered to be the most ecologically plastic species in the Order Decapoda, and is able to grow quickly even in only seasonally present water, being able to tolerate dry spells of up to four months. P. clarkii grows quickly, and is capable of reaching weights in excess of 50 g, and sizes of 5.5–12 centimetres (2.2–4.7 in) long. It is also able to tolerate slightly saline water, which is unusual for a crayfish. The average lifetime of Procambarus clarkii is 5 years. It is known that some individuals have reached ages (in nature) over 6 years.
The burrowing activities of P. clarkii can lead to damage to water courses and to crops, particularly rice crops, and its feeding can disrupt native ecosystems. It may out-compete the native crayfish species, and is a vector for the crayfish plague fungus Aphanomyces astaci, for crayfish virus vibriosis and a number of worms parasitic on vertebrates.
|Blue, Red & White Clarkii / Crawfish|
|Clakii Blue & Red Crawfish|
The introduction of P. clarkii has also resulted in economic losses in some regions. In the Baixo Mondego region of Portugal, it caused a decrease in 6.3% of profits in rice fields. However, this was on a wet-seeded field. All negative effects of crawfish can be avoided if adult crawfish are separated from the seed and seedlings
Procambarus clarkii are eaten in United States, Cambodia, Europe, China, Africa, Australia, Canada, New Zealand and the Caribbean. About 98% of the crayfish harvested in the United States come from Louisiana, where the standard culinary terms are crawfish or écrevisses.
Louisiana produces 90% of the crawfish in the world and consumes 70% locally.
Louisiana crawfish are usually boiled in a large pot with heavy seasoning (salt, cayenne pepper, lemon, garlic, bay leaves, etc.) and other items such as potatoes, corn on the cob, onions, garlic, and sausage. There are many differing methods used to season a crawfish boil and an equal number of opinions on which one is correct. They are generally served at a gathering known as a crawfish boil.
Procambarus clarkii normally reproduces sexually, but recent research suggests it may also reproduce by parthenogenesis.