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Petromyzontiformes (Lampreys) >
Petromyzontidae (Northern lampreys) > Lampetrinae
Etymology: Entosphenus: entos (Gr.), within; sphenos (Gr.), wedge, referring to wedge-shaped tooth within mouth on tongue of E. tridentatus. (See ETYFish); macrostoma: macro-, from makros (Gr.), long or large; stoma (Gr.), mouth (but used here as an adjective, mouthed), referring to large oral disc compared with E. tridentatus. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
; Nước ngọt gần đáy; không di cư. Temperate; 48°N - 47°N
North America: southern Vancouver Island, British Columbia. Occurrence in USA needs confirmation (Ref. 2583).
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ? range ? - ? cm
Max length : 27.3 cm TL con đực/không giới tính; (Ref. 89241); Khối lượng cực đại được công bố: 19.80 g (Ref. 89241); Tuổi cực đại được báo cáo: 2.00 các năm (Ref. 89241)
Adults: 11.8-27.3 cm TL; body wet weigth of a 22.1 cm TL individual, 19.8 g; body proportions, as percentage of TL (based on 112 specimens measuring 11.8-27.3 cm TL): prebranchial length, 14.3-17.6; branchial length, 9.4-12.6; trunk length, 37.5-48.2; tail length, 20.9-31.7; eye length, 2.2-3.5; disc length, 6.5-11.7; trunk myomeres, 59-70. Adult dentition: marginals, 54-67; supraoral lamina, 3, rarely 4 unicuspid teeth, the median one smaller than the lateral ones; infraoral lamina, 5-6 unicuspid teeth; 4 endolaterals on each side; endolateral formula, typically 2-3-3-2; 2 rows of anterials; first row of anterials, 3 unicuspid teeth; exolaterals absent; 1 row of posterials, 14-21 teeth, 2-3 lateralmost on each side bicuspid and the internal ones unicuspid; transverse lingual lamina, 13-20 unicuspid teeth, the median one slightly enlarged; longitudinal lingual laminae parentheses-shaped and each with 17-27 unicuspid teeth. Velar tentacles in adults, 11-15 with wings. Adult body coloration (preserved), uniformly dark, almost black; lateral line neuromasts darkly pigmented; extent of caudal fin pigmentation, 75% or more; caudal fin shape, spade-like; oral fimbriae, 117; oral papillae, 17.
Spawns on shallow gravel bars in freshwater lakes or the mouths of creeks flowing into lakes. Ammocoetes larvae occur in silt, mud, or sand in quiet water (Ref. 5723). Ammocoetes are found in inlet streams within 100 m of two lakes in Vancouver Island, British Columbia. Ammocoetes and recently metamorphosed individuals are mostly found along the edges of lakes. Adult life span believed to be at least 2 years. Adults parasitic on fishes (Oncorhynchus clarkia and O. kisutch) in freshwater lakes throughout the year. Wounds produced known to penetrate deeply into the musculature or even reach the body cavity of hosts. Up to three adults have been recorded attached to a host. Adults are known experimentally to be able to survive in salt water, but apparently remain in fresh water despite the absence of barriers preventing access to the sea. Adults in spawning readiness collected from shallow gravel bars between 1 June and 23 August. Between 50 and 80% of fishes, mostly salmonids, in Lake Cowichan and Mesachie Lake show evidence of attacks from this lamprey, and based on the severity of the wounds inflicted, an estimated 15% of these attacks would probably result in the death of the host (Ref. 89241).
Life cycle and mating behavior
Chín muồi sinh dục | Sự tái sinh sản | Đẻ trứng | Các trứng | Sự sinh sản | Ấu trùng
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)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Các nghề cá: không ích lợi (thú vị)
Thêm thông tin
Các tài liệu tham khảoNuôi trồng thủy sảnTổng quan nuôi trồng thủy sảnCác giốngDi truyềnElectrophoresesDi sảnCác bệnhChế biếnNutrientsMass conversion
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00126 (0.00056 - 0.00284), b=2.99 (2.80 - 3.18), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Mức dinh dưỡng (Ref.
69278): 4.1 ±0.7 se; based on size and trophs of closest relatives
Thích nghi nhanh (Ref.
120179): thấp, thời gian nhân đôi của chủng quần tối thiểu là 4.5 - 14 năm (Semelparous species, assuming tm (= tmax) > 4).
Fishing Vulnerability (Ref.
59153): Low vulnerability (17 of 100).
