分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Petromyzonti >
Petromyzontiformes (Lampreys)
七鰓鰻目 (Lampreys) >
Petromyzontidae (Northern lampreys)
七鰓鰻科 (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); bdellium: -ium, Latin adjectival suffix: bdella (Gr.) leech, referring to its leech-like suctorial and/or parasitic feeding behavior (as adults) (See ETYFish).
More on author: Jordan.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 居於水底的. 溫帶; 43°N - 34°N
North America: Ohio River basin from extreme southwestern New York west to northern Indiana and eastern Illinois and south to northern Alabama in USA.
北美洲: 俄亥俄河流域從紐約州西南端西至印地安那州北部與伊利諾州東部而且在美國南至阿拉巴馬州北部。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 30.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 5723); 30.5 cm TL (female); common length : 19.2 cm TL 雄魚/尚未辨別雌雄; (Ref. 12193); 最大年齡: 1.00 年 (Ref. 12193)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
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).
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).
棲息於比較小又更多的高地河川，而且比較少量在水庫見到.。 (參考文獻 10294) 幼八目鰻生活在泥濘的池與死水中的破瓦殘礫的附近。 已知寄生於吸管.(參考文獻 10294)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
北美洲: 俄亥俄河流域從紐約州西南端西至印地安那州北部與伊利諾州東部而且在美國南至阿拉巴馬州北部。
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 瀕危狀態 (Ref. 130435: Version 2024-2)
無危 (LC) ; Date assessed: 17 February 2012
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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=0.00107 (0.00040 - 0.00284), b=3.03 (2.80 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 4.4 ±0.8 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 低的, 最小族群倍增時間4.5 - 14 年 (Semelparous species, assuming tm (= tmax) > 4).
Fishing Vulnerability (Ref.
59153): Low vulnerability (21 of 100).
