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Ichthyomyzon gagei Hubbs & Trautman, 1937

Southern brook lamprey
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Ichthyomyzon gagei
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United States (contiguous states) country information

Common names: Southern brook lamprey
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Mississippi River basins of southern Missouri, eastern Oklahoma, Arizona and Louisiana; Tennessee River drainage from Kentucky and Alabama (Ref. 276). Also Ref. 10294. Specifically, Missouri River Basin, Missouri; Lower Mississippi River Basin, Mississippi; Arkansas-Red-White River Basin, Arkansas, Louisiana, Missouri; Tennessee-Cumberland River Basin, Alabama, Kentucky [presumed extirpated according to the Kentucky State Nature Preserves Commission (2004)], and Tennessee; Eastern Gulf of Mexico drainage, Alabama (Choctafaula Creek), Georgia, Florida, and Mississippi; Western Gulf of Mexico drainage, Louisiana and Texas (Ref. 89241). Status of threat: Endangered, and is treated as a Species of Special Concern in Tennessee (Ref. 10294).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/us.html
National Fisheries Authority: http://www.nmfs.gov
Occurrences: Occurrences Point map
Main Ref: Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea and W.B. Scott, 1980
National Database:

Common names from other countries

Классификация / Names народные названия | синонимы | Catalog of Fishes(род, виды) | ITIS | CoL | WoRMS | Cloffa

> Petromyzontiformes (Lampreys) > Petromyzontidae (Northern lampreys) > Petromyzontinae
Etymology: Ichthyomyzon: ichthys, fish; myzon (Gr.), to suck (borrowed from Petromyzon), i.e., a sucking fish, referring to their suctorial behavior. (See ETYFish);  gagei: In honor of American histologist and embryologist Simon Henry Gage (1851-1944), Cornell University (Ithaca, New York, USA), “one of the foremost students of the lampreys,” who brought this “interesting and distinct species” to the authors’ attention. (See ETYFish).
  More on authors: Hubbs & Trautman.

Environment: milieu / climate zone / depth range / distribution range экология

; пресноводный демерсальный.   Temperate; 37°N - 31°N

распространение страны | регионы FAO | Ecosystems | места находок | Point map | интродукции | Faunafri

North America: Mississippi River basins, Tennessee River drainage and Gulf of Mexico Coast drainages from Ochlockonee River in Florida to Galveston Bay in Texas, USA.

Size / Вес / Возраст

Maturity: Lm ?  range ? - ? cm
Max length : 17.0 cm TL самец/пол неопределен; (Ref. 5723); common length : 12.0 cm TL самец/пол неопределен; (Ref. 12193)

Краткое описание морфология | морфометрия

Distinguished by the following characters: Oral disc narrower than head; teeth blunt and poorly developed; usually 52-56 trunk myomeres; black on lateral-line pores; one slightly notch dorsal fin (Ref. 86798). Other adult diagnostic features: 8.6-12.9 cm TL. Body proportions, as percentage of TL (based on 35 specimens measuring 8.6-12.9 cm TL): prebranchial length, 8.3-11.2; branchial length, 8.3-11.1; trunk length, 47.0-56.0; tail length, 25.6-33.3; eye length, 1.1-2.1; disc length, 3.8-6.5. Urogenital papilla length, as a percentage of branchial length, in 6 spawning males measuring 9.2-11.1 cm TL, 22.7-33.3. Trunk myomeres, 50-56, with a strong mode at 53. Dentition: supraoral lamina, 2-4 teeth, usually 2; infraoral lamina, 5-10 unicuspid teeth, usually 8-9; 4-5 endolaterals on each side; 0-8 bicuspid endolaterals in total, the other endolaterals, unicuspid; 3-4 rows of anterials; first row of anterials, 3 unicuspid teeth; 3-4 rows of exolaterals on each side; 2 rows of posterials; first row of posterials, 9 unicuspid teeth; crest of transverse lingual lamina linear to weakly w-shaped, with no apparent cusps; longitudinal lingual laminae each with undetermined number of unicuspid teeth. Velar tentacle number unrecorded. Body coloration (preserved) distinctly bicolored, with the dorsal aspect dark and the ventral aspect light. Lateral line neuromasts darkly pigmented. Caudal fin pigmentation unrecorded. Caudal fin shape, rounded. Oral fimbriae number unrecorded. Oral papillae number unrecorded (Ref. 89241).

биология     глоссарий (например epibenthic)

Freshwater (Ref. 89241). Inhabits gravel and sand riffles, and runs of creeks and small rivers. Ammocoete larvae occur in flowing water near sand bars and debris. Non-parasitic (Ref. 5723). Average fecundities varied from 713-2,448 eggs/female among 19 localities across the distributional range (Ref. 89241).

Life cycle and mating behavior половая зрелость | размножение | нерест | икра | Fecundity | личинки

Основная ссылка Upload your references | ссылки | координатор | соавторы

Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)

Статус Красного Списка МСОП (Ref. 130435)

  Не вызывающий беспокойства (LC) ; Date assessed: 17 February 2012

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Угроза для людей

  Harmless




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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5156   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00107 (0.00040 - 0.00285), b=3.03 (2.81 - 3.25), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  4.1   ±0.7 se; based on size and trophs of closest relatives
устойчивость к внешним воздействиям (Ref. 120179):  низкий, минимальное время удвоения популяции 4.5-14 лет (Semelparous species, assuming tm (= tmax) > 4).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).