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Image de Lamproie de l’Ohio
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Lamproie De L’ohio

Ichthyomyzon bdellium (Jordan 1885)

Diagnostic Description ( anglais )

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Distinguished by the following characters: oral disc as wide or wider than head; teeth sharp and well developed; usually 56-62 trunk myomeres; black on lateral-line pores; one slightly notched dorsal fin (Ref. 86798). Other diagnostic features: 11.7-27.9 cm TL. Body proportions, as percentage of TL (based on 51 specimens measuring 12.5-25.9 cm TL): prebranchial length, 10.4-14.0; branchial length, 7.6-10.7; trunk length, 47.3-54.3; tail length, 21.4-31.2; eye length, 0.6-1.8; disc length, 6.2-9.5. The urogenital papilla length, as a percentage of branchial length, in 10 spawning males measuring 11.7-24.7 cm TL, 8.7-16.0. Trunk myomeres, 53-62. Dentition: supraoral lamina, 2-3 teeth (if 3, the median one shortest); infraoral lamina, 5-11 teeth; typically 4 endolateral teeth on each side, but 5 teeth also occur; 7-10, mode of 8, bicuspid endolaterals in total, the other endolaterals, if any, unicuspid; 3-4 rows of anterials, usually 3; first row of anterials, 3 teeth, all unicuspid; 4-8 rows of exolaterals on each side, usually 6; 2 rows of posterials; first row of posterials, 8-9, all unicuspid; transverse lingual lamina moderately to strongly w-shaped, with numerous cusps; longitudinal lingual laminae, number of teeth unrecorded. Velar tentacles, 2-3, smooth. Body coloration (live), slate gray dorsal aspect and silvery gray lateral and ventral aspects. Lateral line neuromasts darkly pigmented, although they may be unpigmented in recently transformed adults. Caudal fin pigmentation, 75% or more. Caudal fin shape, rounded. Oral fimbriae, 103-144. Oral papillae, 20-32 (Ref. 89241).
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Biology ( anglais )

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Inhabit smaller, more upland rivers, and less encountered in reservoirs (Ref. 10294). Freshwater. Ammocoetes and spawning adults inhabit brooks and small rivers, while feeding adults inhabit medium-sized to large rivers (Ref.89241). Ammocoete larvae live near debris in muddy pools and backwaters. Known to parasitize suckers (Ref. 10294).
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Ohio lamprey ( anglais )

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The Ohio lamprey (Ichthyomyzon bdellium) is a lamprey found in the Ohio River drainage basin in the United States and is a parasitic species of lampreys. They are considered to be an endangered/rare species in some states, due to siltation, pollution, and construction of dams.

Description

All lampreys have a long, almost eel-like, body with no scales. Lampreys have segments of muscles that are visible along their body called myomeres, and a jawless mouth. In larval lampreys, called ammocoetes, their mouth is not fully developed, very small, and hidden between folds of skin. Adults have a disk shaped mouth with varying amounts of teeth depending on the species. The Ohio lamprey has a single, continuous dorsal fin. Fully grown, Ohio lampreys reach 10-14 inches, but may get to 15 inches.

Diet

As ammocoetes, Ohio lamprey filter plankton, algae, and other small organic matter. As adults, they attach onto larger prey, such as smallmouth bass, walleyes, redhorse suckers and trout and feeding on blood and body fluids. Ohio lampreys do not appear to kill the host fish, as they evolved with other fishes in their range. As a result, they do not appear to have a significant effect on populations of their host fishes.

Reproduction

As a sexually mature adult, Ohio lamprey will seek out suitable breeding sites. They likely do not return to their natal site to spawn, but this remains untested. Spawning occurs in late May or early June, with adults working together or in pairs to create a pit in riffles of moderate currents. They use their suction cup-like mouth to move rocks from these riffles, and then the female lamprey deposits eggs into this pit after mating. All adults will die after spawning.

Distribution

The Ohio lamprey is found throughout the Ohio River basin in 11 states: Alabama, Georgia, Indiana, Kentucky, New York, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia, and West Virginia. The Ohio lamprey used to be found in Illinois, but is now considered to be extirpated; the last sighting was in 1918.

References

  1. ^ Van Der Laan, Richard; Eschmeyer, William N.; Fricke, Ronald (11 November 2014). "Family-group names of Recent fishes". Zootaxa. 3882 (1): 1–230. doi:10.11646/zootaxa.3882.1.1. PMID 25543675.
  2. ^ Froese, R.; Pauly, D. (2017). "Petromyzontidae". FishBase version (02/2017). Retrieved 18 May 2017.
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Ohio lamprey: Brief Summary ( anglais )

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The Ohio lamprey (Ichthyomyzon bdellium) is a lamprey found in the Ohio River drainage basin in the United States and is a parasitic species of lampreys. They are considered to be an endangered/rare species in some states, due to siltation, pollution, and construction of dams.

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Ichthyomyzon bdellium ( basque )

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Ichthyomyzon bdellium Ichthyomyzon generoko animalia da. Arrainen barruko Petromyzontidae familian sailkatzen da.

Erreferentziak

  1. Froese, Rainer & Pauly, Daniel ed. (2006), Ichthyomyzon bdellium FishBase webgunean. 2006ko apirilaren bertsioa.

Ikus, gainera

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Ichthyomyzon bdellium: Brief Summary ( basque )

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Ichthyomyzon bdellium Ichthyomyzon generoko animalia da. Arrainen barruko Petromyzontidae familian sailkatzen da.

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Ichthyomyzon bdellium ( néerlandais ; flamand )

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Ichthyomyzon bdellium is een kaakloze vissensoort uit de familie van de prikken (Petromyzontidae).[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1885 door Jordan.

Bronnen, noten en/of referenties
  1. (en) Ichthyomyzon bdellium. FishBase. Ed. Ranier Froese and Daniel Pauly. 02 2013 version. N.p.: FishBase, 2013.
Geplaatst op:
25-02-2013
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Ichthyomyzon bdellium ( polonais )

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Ichthyomyzon bdellium – gatunek bezżuchwowca z rodziny minogowatych (Petromyzontidae).

Zasięg występowania

Dorzecze rzeki Ohio w USA.

Budowa ciała

Osiąga 11,5-28 cm długości całkowitej (maksymalnie do 30 cm (samce) - 30,5cm (samice)). Ślepice osiągają do 17 cm długości. Procentowe proporcje długości poszczególnych części ciała są następujące: odcinek przedskrzelowy 10,4 -14,1%, odcinek skrzelowy 7,6 - 10,7%, tułów 47,3 - 54,3%, ogon 21,4 - 31,2%, oko 0,6 - 1,8%, przyssawka 6,2 - 9,5%. Wzdłuż tułowia 53-62 miomery. Przyssawka tak samo szeroka bądź szersza od głowy, zęby ostre i dobrze rozwinięte. Płetwa grzbietowa pojedyncza, lekko fałdowana. Płetwa ogonowa zaokrąglona.

Ubarwienie grzbietu szare, zaś boków i brzucha szarosrebrzyste. Linia boczna jest ciemno zabarwiona choć u świeżo przeobrażonych osobników może się nie wybarwiać. Płetwy mocno wybarwione.

Biologia i ekologia

Tryb życia

Gatunek słodkowodny. Zamieszkuje mniejsze rzeki w ich wyżej położonych odcinkach, rzadziej spotykany w zbiornikach zaporowych. Ślepice, oraz osobniki gotowe do tarła, bytują w strumieniach i małych rzekach (gdzie larwy przebywają w spokojnych zakolach i rozlewiskach o mulistym dnie), zaś dorosłe minogi spotyka się w większych rzekach.

Odżywianie

Gatunek pasożytniczy. Chętnie żeruje na gatunkach Moxostoma carinatum, Moxostoma erythrurum, sandaczu amerykańskim oraz introdukowanym karpiu.

Przypisy

  1. Ichthyomyzon bdellium, w: Integrated Taxonomic Information System (ang.).
  2. Ichthyomyzon bdellium. Czerwona księga gatunków zagrożonych (IUCN Red List of Threatened Species) (ang.).

Bibliografia

  • Ichthyomyzon bdellium. (ang.) w: Froese, R. & D. Pauly. FishBase. World Wide Web electronic publication. www.fishbase.org [dostęp 30 maja 2018]
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Ichthyomyzon bdellium: Brief Summary ( polonais )

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Ichthyomyzon bdellium – gatunek bezżuchwowca z rodziny minogowatych (Petromyzontidae).

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wikipedia POL