Moxostoma anisurum

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Moxostoma anisurum
drawing

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Systematics
without rank: Otophysa
Order : Carp-like (Cypriniformes)
Subordination : Catostomoidei
Family : Suckers (Catostomidae)
Genre : Moxostoma
Type : Moxostoma anisurum
Scientific name
Moxostoma anisurum
Rafinesque , 1820

Moxostoma anisurum also called Silver Redhorse, Silver Mullet, Whitenose Redhorse, White Nose Sucker and in French Chevalier Blanc or Suceur Blanc, is a sucker carp from North America .

description

Moxostoma anisurum is a barbel-like fish. It has the fin formula : Dorsal 14–17 and has a lower mouth. The color ranges from brown to gray on the back and silvery on the flanks. The pectoral, ventral, and anal fins can be orange-red. Moxostoma anisurum lives up to about 10 years and can be up to 75 centimeters long. In 2007, a 4.45 kilogram specimen was caught in the Big Bourbeuse River, a tributary of the Missouri and Meramec Rivers . In 1995, a 6.75 kilogram fish was reported from the Wilson Dam Tailwater on Pickwick Lake in Tennessee . The maximum weight should be a maximum of 10 kilograms.

distribution

Moxostoma anisurum occurs in Canada and the USA. The distribution area extends from the Great Lakes over the St. Lawrence River , the Canadian Hudson Bay , the Mississippi river system, from the Canadian provinces of Quebec and Alberta to northern Alabama and Arkansas . Also in the Missouri , Tennessee River, and Ohio river systems. Moxostoma anisurum occurs east of the Atlantic from the Roanoke River in Virginia to the Altamaha River in Georgia .

Way of life

Moxostoma anisurum prefers muddy to rocky-stony pools and current basins, undermined banks, tree roots and other underwater obstacles from small to large rivers, occasionally it is also found in lakes. It feeds on detritus , insects such as B. Mayflies, mollusks , algae and other small animals. Fast flowing water affects the food spectrum of Moxostoma anisurum on the one hand, but on the other hand promotes the reproduction rate and development from fish egg to larva. Different water temperatures are necessary in the different development phases. The spawning season is from April to May. Then the four to five year old sexually mature animals spawn in shallow water, mainly on gravel. This can lead to hybridization with other myxostoma species. The fish do not tolerate water pollution.

Use

Moxostoma anisurum is a sport fish for coarse anglers . The occurrence of this fish species is an indicator of healthy and ecologically intact water.

Hazardous situation

The population is currently considered endangered in some rivers and lakes in the southeastern United States. While the density of individuals in the Mississippi, Missouri and Ohio Rivers is still high, the species is disappearing in other river biotopes such as the Strawberry River in Arkansas. The species is classified as endangered by the Nature Conservancy in Arkansas. According to some scientists, the changed flow velocity below dams used to generate electricity in the southeast of the USA is the main reason for the decline in stocks. Another reason is the interspecific competition with other Moxostoma species. The northern populations are more developed, for example in Quebec, Canada, there are high numbers of V-males; the survival of the species is guaranteed in a ratio of at least two males to one female, which was confirmed in studies from 2004. In 1983, a research group found a way of using electrophoresis to separate the larvae of two Moxostoma species based on their different protein patterns.

Web links

Notes and individual references

  1. ↑ a b c d e Moxostoma anisurum on Fishbase.org (English)
  2. ↑ http://www.dnr.state.mi.us/spatialdatalibrary/pdf_maps/fish_atlas/illustrations/moxani.pdf
  3. ^ Fishing World Records
  4. ↑ Archived copy ( memento of the original dated December 30, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. @1@ 2Template: Webachiv / IABot / www.outdooralabama.com
  5. ↑ a b R. S. Weyers, CA Jennings and MC Freeman: Effects of Pulsed, High-velocity Water Flow on Larval Robust Redhorse and V-lip Redhorse, Transactions of the American Fisheries Society, Vol. 132.1, 2003, pp. 84-91
  6. ↑ http://www.dnr.state.oh.us/Home/species_a_to_z/SpeciesGuideIndex/silverredhorse/tabid/21970/Default.aspx
  7. ↑ a b c Chris T. McAllister et al .: Distribution of the Silver Redhorse, (Cypriniformes, Catosomidae) in Arkansas, Southwestern Naturalist Vol. 54.4, 2009 pp. 514-518
  8. ↑ http://www.bioone.org/doi/abs/10.1894/GG-36.1
  9. ↑ http://www.nature.org/wherewework/northamerica/states/arkansas/
  10. ↑ Milchner, male
  11. ^ RP Morgan, RE Smith and JR Stauffer: Electrophoretic separation of larval silver redhorse (Moxostoma anisurum) and Golden Redhorse (Moxostoma erythrurum). Comparative Biochemistry and Physiology Biochemistry & Molecular Biology, Vol. 76.4, 1983, pp. 721-722