Английская Википедия:Faxonius neglectus
Шаблон:Speciesbox Faxonius neglectus, a species of freshwater crayfish also known as the ringed crayfish, is native to the White River (Arkansas–Missouri) drainages within the Ozarks.[1] The species name, Faxonius neglectus, was previously Orconectes neglectus (before this, Faxonius was a subgenus of Orconectes[2]). Faxonius was declared its own genus in 2017 by Crandall & De Grave,[3] as many previously thought Orconectes species were found to not reside in caves (a quality of Orconectes).[3]
Description and ecology
There are two subspecies of F. neglectus: F. neglectus chaenodactylus and F. neglectus neglectus.[1] F. neglectus has a uniquely marked decapod anatomy, which includes a wide ring on the rostrum in combination with a dark brown wide ring on the dactyl and propodus of the crayfish's chelipeds, ending in bright red/orange. The third maxilliped ends in a scalloped appearance. The color of the carapace can range from a light brown or yellow color, just rear of the cephalic groove, being banded by a dark brown ring.[4]
Evidence of sexual dimorphism has not been observed to be present for this species. Adult carapace length is an average of 32 mm for males and females. During F. n. chaenodactylus's initial year of life, the average number of molts performed is 8, followed by 4, 3, 4, 4, and 4 molts for each year after.[5] Mating is polygonous, resulting in size based dominance.[6]
Males
In F. neglectus males, there is the presence of the pleopods (swimmerets) being curved towards the tail.[4] Males have been documented to reach maturity within 8 months, but the growth of immature F. n. chaenodactylus is dependent upon temperature fluctuations during this time.[5] The average maximum age for F. n. chaenodactylus males is 5 years, with the average age being 3 years.[6]
Females
The average maximum age for F. n. chaenodactylus females is 4 years, with the average age being 3 years.[6]
Habitat
Native range
The native range for F. neglectus, broadly, are the Neosho River, and Upper White River (Arkansas–Missouri) drainages of the Boston Mountains and Ozark Highlands.[1]
Invasive range
F. neglectus has been documented as an invasive species in the Hudson River's Croton River drainage of southeastern New York, and the Housatonic River drainage of Connecticut.[4] F. neglectus is an invasive species in the Spring River (Arkansas) drainage of the Ozarks. Where F. neglectus colonizes, the native species, Orconectes eupunctus and Cambarus hubbsi, are no longer present, despite having been previously observed in those areas.[7]
References
External links
Шаблон:Commons category Шаблон:Edible crustaceans Шаблон:Taxonbar Шаблон:Authority control
- ↑ 1,0 1,1 1,2 Magoulick, D. D., Wynne, K. C., & Clark, J. (2022). Morphological traits related to potential invasiveness of two subspecies of the crayfish Faxonius neglectus. River Research and Applications, 38(8), 1510–1518. https://doi.org/10.1002/rra.4024
- ↑ Ошибка цитирования Неверный тег
<ref>; для сносокogtaxaне указан текст - ↑ 3,0 3,1 Crandall, K. A., & De Grave, S. (2017). An updated classification of the freshwater crayfishes (Decapoda: Astacidea) of the world, with a complete species list. Journal of Crustacean Biology, 37(5), 615–653. https://doi.org/10.1093/jcbiol/rux070
- ↑ 4,0 4,1 4,2 Daniels, R. A., Murphy, D. C., & Klemens, M. W. (2001). Orconectes neglectus Is Established in the Northeast. Northeastern Naturalist, 8(1), 93–100. https://doi.org/10.2307/3858265
- ↑ 5,0 5,1 Price, J. O., & Payce, J. F. (1984). Postembryonic to Adult Growth and Development in the Crayfish Orconectes neglectus chaenodactylus Williams, 1952 (Decapoda, Astacidea). Crustaceana, 46(2), 176–194.
- ↑ 6,0 6,1 6,2 Price, J. O., & Payne, J. F. (1984). Size, Age, and Population Dynamics in an R-Selected Population of Orconectes neglectus chaenodactylus Williams (Decapoda, Cambaridae). Crustaceana, 46(1), 29–38.
- ↑ Magoulick, D. D., & DiStefano, R. J. (2007). Invasive Crayfish Orconectes neglectus Threatens Native Crayfishes in the Spring River Drainage of Arkansas and Missouri. Southeastern Naturalist, 6(1), 141–150.
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