![]() ![]() Journal of Crustacean Biology 4(1):12-24. On the distribution of the crayfish genus Procambarus (Decapoda: Cambaridae). Distribution and relative abundance of the crayfishes Procambarus alleni (Faxon) and P. Life history, ecology, and interactions of Everglades crayfishes. ![]() Biodiversity of the southeastern United States: lowland terrestrial communities. Journal of the North American Benthological Society 28(4):766-777. Resistance of crayfish ( Procambarus spp.) populations to wetland drying depends on species and substrate. Crayfish assemblage shifts in a large drought-prone wetland: the roles of hydrology and competition. Positive selection of beautiful invaders: long-term persistence and bio-invasion risk of freshwater crayfish in the pet trade. While the duration of attachment varies, the hatched young appear to recruit to the population by the following summer (Hendrix et al. Reflooding of the littoral zone brings crayfish to the surface with the young still attached. alleni undergo a period in which newly hatched young stay attached to the female's pleopods. The young hatch within the burrow, and like other procambarids, P. Oviposition occurs while individuals are burrowed during the dry season (Hendrix et al. The mean size at maturity for females excavated in the same study was estimated to be 27.9 mm CL, varying from 18.2 to 34.4 mm CL. The mean size of reproductively active males was reported as 29.3 mm in CL, but this varied from 19.2-38.9 mm CL. alleni mature at approximately one year of age. ![]() alleni follows that of most Procambarids (Hobbs, 1942 Hendrix et al. alleni may remain in their burrows for months to avoid desiccation and to reproduce (Hobbs 1942 Hendrix et al. alleni is capable of burrowing effectively in peat, marl, and sand substrates, but its resilience to desiccation varies depending on the substrate composition (Dorn and Volin 2009). alleni burrows can often be identified through conspicuous mounds or chimneys constructed from excavated materials (Hendrix et al. Procambarus alleni constructs and utilizes burrows during droughts and reproductive periods (Hobbs 1942 Hendrix et al. alleni seeks refuge in burrows (Hobbs 1942 Hendrix et al. fallax continues to occupy areas that remain flooded, P. During the dry season (winter and spring), while P. Procambarus alleni commonly co-occur with Procambarus fallax during periods of inundation however, during droughts the two species are partitioned based on hydrologic conditions. alleni inhabit inundated shorelines, where dense vegetation limits predation by fishes and conspecifics (Jordan et al. During the rainy season (summer and fall), P. This crayfish typically occupies freshwater systems, but they have been collected from waterways with salinities as high as 18 parts per thousand (ppt) (Hendrix et al. alleni have been collected from flowing waters, their habitat preference appears to be temporary, freshwater bodies of water that are still or very sluggish, or littoral zones that periodically desiccate due to seasonal droughts (Hobbs 1942 Hendrix et al. Additionally, knobs used to hold females in place during mating can be seen at the base of the fifth pereiopod of form I males (Hobbs 1989 Vanarman 2003).Įcology: Procambarus alleni inhabit a wide range of ephemeral and permanent wetlands, including prairie marshes, flood plains, road side ditches, and small streams (Hobbs 1942 Hendrix et al. alleni can be recognized through the presence of hooks on the third and fourth pereiopods. ![]() alleni should be verified by microscopic examination of the secondary sexual features illustrated in Hobbs (1989) and Vanarman (2003). Due to variation in the morphology of both species, identification between P. fallax (Slough Crayfish) through the presence of dark, circular areas, referred to as “headlights”, found at the base of both antennal glands (Hendrix and Loftus 2000 Vanarman 2003). Procambarus alleni can be distinguished from P. This species has a rostrum with or without lateral spines, relatively narrow areola that is 7 to 14 times as long as it is wide, postorbital ridges terminating cephalad with or without spines, and one lateral spine usually present on sides of carapace (Hobbs 1942). Wild caught specimens can be blue, brown, or red in color. Identification: The Everglades Crayfish, Procambarus alleni, is widely available in the aquarium trade due to the brilliant blue color morphs that are bred in captivity (Inman 1998 Chucholl and Wendler 2017). ![]()
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