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) > Lampetrinae
Etymology: Entosphenus: entos (Gr.), within; sphenos (Gr.), wedge, referring to wedge-shaped tooth within mouth on tongue of E. tridentatus. (See ETYFish); lethophagus: lethe (Gr.), forgetting or forgetfulness; phagein (Gr.), to eat, i.e., not eating (an adjective), referring to adults, which do not eat before they spawn and die. (See ETYFish).
More on author: Hubbs.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 居於水底的; 非遷移的. 溫帶; 43°N - 41°N
North America: Klamath River in south central Oregon (rare) and Pit River in northeastern California, USA.
北美洲: 奧勒岡州中南部的克拉瑪斯河 (稀有的) 與美國加州東北方的 Pit 河。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 22.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 5723); common length : 14.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 12193)
簡短描述
型態特徵 | 形態測量圖
背棘 (總數): 0; 臀棘 0. Adults: 12.4-18.4 cm TL. Adult body proportions, as percentage of TL (based on ten specimens 12.6-18.4 cm TL): prebranchial length, 8.2-13.3; branchial length, 8.4-10.8; trunk length, 43.4-51.6; tail length, 28.8-35.3; eye length, 1.6-3.2; disc length, 4.1-6.1; urogenital papilla length, 16.0 (percentage of branchial length in a spawning male measuring 12.9 cm TL); trunk myomeres, 58-73. Adult dentition: supraoral lamina, 2-3 unicuspid teeth, usually 3; infraoral lamina, 5-7 unicuspid teeth; 4 endolaterals on each side; endolateral formula, typically 2-2-2-2 or 2-3-3-2, the first and fourth endolaterals may also rarely be unicuspid; 2-3 rows of anterials; first row of anterials, 1 or 5 unicuspid teeth; exolaterals absent; 1 row of posterials with 10-17 teeth, of which 0-12 are bicuspid and the rest unicuspid; transverse lingual lamina, 15-20 unicuspid teeth, the median one slightly enlarged; longitudinal lingual laminae each with undetermined number of unicuspid teeth. Velar tentacles in adults, 5-12, with tubercles; median tentacle shorter than the lateral ones immediately next to it; body coloration (preserved), ventral aspect whitish; oral papillae, 5-26 (Ref. 89241).
四對側齒板 (尖頭 =2-2-2-2); 上口板有 3個鈍的牙尖。
Inhabits riffles and runs of clear streams. Ammocoetes larvae occur near weed beds and sand bars. Non-parasitic (Ref. 5723). Freshwater; adults from Crooked Creek, Oregon are sexually mature in mid-March (Ref. 89241).
棲息於清澈溪流的急流與小水流。 幼八目鰻在雜草叢與沙洲的附近出現。 非寄生。
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
北美洲: 奧勒岡州中南部的克拉瑪斯河 (稀有的) 與美國加州東北方的 Pit 河。
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)
無危 (LC) ; Date assessed: 22 February 2012
人類使用
漁業: 沒有興趣
更多資訊
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年龄/大小成長長度-重量長度-長度長度-頻率形態測量圖型態特徵仔魚稚魚動力學入添量豐度BRUVS
參考文獻養殖養殖資訊品種遺傳學Electrophoreses遺傳率疾病加工NutrientsMass conversion
合作者照片Stamps, Coins Misc.聲音神經毒速度泳型鰓區Otoliths腦重體重比眼睛色素
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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).
營養階層 (Ref.
69278): 4.1 ±0.7 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 (12 of 100).
