分类 / Names
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Petromyzonti >
Petromyzontiformes (Lampreys) >
Petromyzontidae (Northern lampreys) > Lampetrinae
Etymology: Lampetra: lambo (L.), to lick; petra (Gr.), rock or stone, referring to their suctorial behavior (adults attach to rocks during nest building and mating). (See ETYFish); hubbsi: In honor of American ichthyologist Carl L. Hubbs (1894-1979), “distinguished friend and a keen student of lamprey taxonomy” [placed in Entosphenus by some workers]. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 居于水底的; 非迁移的. 溫帶; 38°N - 36°N
North America: East side of San Joaquin Valley in lower Merced, Kaweah, Kings, and San Joaquin rivers in California, USA.
北美洲: 已知只來自在克恩縣的 Friant-克恩的運河而且在 Merced 縣，美國加州已知只來自 Merced 河了。
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 14.2 cm TL 雄鱼/尚未辨别雌雄; (Ref. 89241); common length : 12.9 cm TL 雄鱼/尚未辨别雌雄; (Ref. 12193)
简单描述
检索表 | 型态特徵 | 形态测量图
背棘 (总数) : 0; 臀棘: 0. Characterized by having expanded oral disc narrower than head, usually 52-56 trunk myomeres, 2 supraoral teeth, usually 1-1-1-1 lateral circumoral teeth, 9-12 unicuspid posterior circumoral teeth, 5 infraoral teeth and coloration consisting of gray to brown above, white below, black specks on dorsal and caudal fins, and no black on lateral-line pores (Ref. 86798). Adults: 8.1-14.2 cm TL; body proportions (percentage of TL based on 127 specimens 8.1-14.2 cm TL): 7.8-14.4 prebranchial length, 8.5-12.8 branchial length, 44.6-56.9 trunk length, 24.3-30.8 tail length, 0.8-2.8 eye length and 3.7-8.7 disc length, 8.3-16.7 urogenital papilla length (percentage of branchial length in 9 spawning males 10.6-12.4 cm TL); trunk myomeres, 50-57. Adult dentition: supraoral lamina, 2 unicuspid teeth, rarely 3; infraoral lamina, 4-unicuspid teeth, usually 5; 4 endolaterals on each side, rarely 3; endolateral formula, typically 1-1-1-1, the first endolateral may also be bicuspid, the second and third endolaterals bi- or tricuspid, and the fourth bicuspid, however, no endolateral formula of 2-3-3-2 was encountered in 40 individuals examined; 2 row of anterials, 3-9 unicuspid teeth in total, three of these in the first row; exolaterals absent; 1 row of posterials, 8-12 unicuspid teeth in a continuous (complete) row or discontinuous (incomplete) row of only six unicuspid teeth; transverse lingual lamina, cusps too poorly developed to count, however, the median one not enlarged; longitudinal lingual laminae, cusps too poorly developed to count. Velar tentacles in adults, 3-5, with tubercles; median velar tentacle shorter than the lateral ones immediately next to it; no velar wings; body coloration (preserved), gray-brown on dorsal and lateral aspects, whitish on ventral aspect; extent of caudal fin pigmentation, 1% to <25%; caudal fin shape, rounded (Ref. 89241).
四对侧齿板 (尖头 =1-1-1-1); 上口板有二个锐利的尖头;
Inhabits silty backwaters of rivers and spawns in gravel riffles (Ref. 86798). Both the larval and adult stages were originally collected from the Friant-Kern Canal, which is 85% concrete lined and has a discharge greater than 57 m3/sec; an artificial habitat. Occurs in the Merced River, which should be considered typical habitat. Adults nonparasitic (Ref. 89241).
一个非寄生的八目鳗。
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔鱼
北美洲: 已知只來自在克恩縣的 Friant-克恩的運河而且在 Merced 縣，美國加州已知只來自 Merced 河了。
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)
人类利用
渔业: 没有兴趣
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5002 [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).
营养阶层 (Ref.
69278): 3.7 ±0.5 se; based on size and trophs of closest relatives
回复力 (Ref.
120179): 低的, 最小族群倍增时间4.5 - 14 年 (Semelparous species, assuming tm (= tmax) > 4).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
