Lethenteron alaskense Vladykov & Kott, 1978
Alaskan brook lamprey
分類 / 名稱 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: Lethenteron: Etymology not explained, perhaps lethalis (L.), lethal, or lethe (Gr.), forgetting or forgetfulness; enteron (Gr.) intestine, presumably referring to “degenerate and non-functional” intestine of adult L. appendix (See ETYFish); alaskense: -ensis, Latin suffix denoting place: Alaska (USA), where type locality (West Creek, a tributary of Brooks Lake) is situated (See ETYFish).
Etymology: Lethenteron: Etymology not explained, perhaps lethalis (L.), lethal, or lethe (Gr.), forgetting or forgetfulness; enteron (Gr.) intestine, presumably referring to “degenerate and non-functional” intestine of adult L. appendix (See ETYFish); alaskense: -ensis, Latin suffix denoting place: Alaska (USA), where type locality (West Creek, a tributary of Brooks Lake) is situated (See ETYFish).
Taxonomic Remarks
Provisionally considered to be a junior synonym of Lethenteron kessleri (Anikin, 1905) (in Ref. 125650).
環境： 環境 / 氣候帶 / 深度上下限 / 配送範圍 生態學
; 淡水 居於水底的; 河川洄游 (Ref. 43939). 溫帶
分布 領土 | FAO區域 | 生態系 | 發現紀錄 | 分布圖 | 簡介 | Faunafri
North America: Alaska and Kenai peninsulas to Chatanika and Chena rivers near Fairbanks; Martin River, Mackenzie River basin, Northwest Territories.
北美洲: 阿拉斯加州與肯奈半島到 Chatanika 與費班克附近的Chena 河; 馬丁河，麥肯茲河流域，西北地區。
北美洲: 阿拉斯加州與肯奈半島到 Chatanika 與費班克附近的Chena 河; 馬丁河，麥肯茲河流域，西北地區。
大小 / 重量 / 年齡
簡短描述 檢索表 | 型態特徵 | 形態測量圖
Adult preserved specimens gray-brown dorsally, white ventrally, with a dark blotch on 2nd dorsal fin; tail dark. Teeth on disk blunt and weakly cornified. Tongue teeth poorly developed and blunt. Typical length 12-17 cm TL (Ref. 43939). Trunk myomeres 66-72 (Ref. 43938, 89241). Other adult diagnostic features: 12.2-18.8 cm TL. Body proportions, as percentage of TL (based on 68 specimens measuring 12.2-18.8 cm TL): prebranchial length, 9.3-14.9; branchial length, 8.7?11.6; trunk length, 45.4-53.5; tail length, 25.7-33.5; eye length, 1.7-3.2; disc length, 3.8-7.3. Urogenital papilla length, as a percentage of branchial length, in a 14.1 cm TL spawning male, 26.9. The shape of the second dorsal fin in spawning males is arch-like and in females triangular. Dentition: supraoral lamina, 2 unicuspid teeth (1 of 34 specimens had 2 additional small unicuspid teeth on the bridge); infraoral lamina, 6-11 teeth, the lateralmost one on each side unicuspid or bicuspid and the internal ones unicuspid; 3 endolaterals on each side; endolateral formula, 2-2-2; 3 rows of anterials; first row of anterials, 3-5 unicuspid teeth; total number of anterials, 23-38 unicuspid teeth; exolaterals absent or one or two unicuspid exolaterals present in each lateral field, exceptionally, one complete row of exolaterals on each side; single row of posterials, 17-24 unicuspid teeth; transverse lingual lamina, 9-15 unicuspid teeth, the median one greatly enlarged; longitudinal lingual laminae each with 6-13 unicuspid teeth. Velar tentacles, 5-7, with tubercles and with the single median tentacle shorter than the lateral tentacles immediately next to it. Body coloration (preserved) in mature adults is gray brown on the upper surface and flanks and whitish on the lower surface. Lateral line neuromasts unpigmented. Gular region unpigmented (2 of 64 specimens had weak pigmentation). Second dorsal fin with a dark blotch near the apex (4 of 64 specimens did not have a blotch). Extent of caudal fin pigmentation, 1% to <25% (17% of specimens), 25% to <75% (36%) or, 75% or more (46%). Caudal fin shape, spade-like. Oral papillae, 18 (Ref. 89241).
Body shape (shape guide): eel-like.
成魚的保存標本灰褐色背面, 腹側白色的, 在第二背鰭鰭上具有一個黑色斑塊; 尾部深色的。 牙齒在圓盤鈍與弱的 cornified 。 嘴上的橫帶有兩個尖頭。 嘴下的橫帶 6-11個尖頭。 側齒板 3, 中央的對有兩個尖頭。 舌齒發展不良的與鈍的。 後面的齒呈現。 一些, 增補的邊緣齒位於圓盤的側面區域之上。 典型的長度 12-17 公分TL.(參考文獻 43939) 軀幹 myomeres 66-72.(參考文獻 43938)
Body shape (shape guide): eel-like.
成魚的保存標本灰褐色背面, 腹側白色的, 在第二背鰭鰭上具有一個黑色斑塊; 尾部深色的。 牙齒在圓盤鈍與弱的 cornified 。 嘴上的橫帶有兩個尖頭。 嘴下的橫帶 6-11個尖頭。 側齒板 3, 中央的對有兩個尖頭。 舌齒發展不良的與鈍的。 後面的齒呈現。 一些, 增補的邊緣齒位於圓盤的側面區域之上。 典型的長度 12-17 公分TL.(參考文獻 43939) 軀幹 myomeres 66-72.(參考文獻 43938)
Freshwater, in creeks and rivers (Ref. 89241). A non-parasitic lamprey. At about 4 years of age transforms from ammocoete in fall, moves downstream into lakes over winter; spawns the following spring and summer in shallow of lakes and rivers (Ref. 43939). Spawning period between 11 June and 25 September in Naknek River Basin, Alaska. Fecundity, 2,188-3,477 eggs/female. Egg length, 0.9 mm (Ref. 89241).
一個非寄生的八目鰻。 在秋天於大約來自 ammocoete 的 4 歲變換，移動在冬天以來進入湖之內順流而下; 在湖與河的淺灘中產卵下一個春天與夏天。 (參考文獻 43939)
一個非寄生的八目鰻。 在秋天於大約來自 ammocoete 的 4 歲變換，移動在冬天以來進入湖之內順流而下; 在湖與河的淺灘中產卵下一個春天與夏天。 (參考文獻 43939)
生命週期和交配行為 成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
北美洲: 阿拉斯加州與肯奈半島到 Chatanika 與費班克附近的Chena 河; 馬丁河，麥肯茲河流域，西北地區。
主要參考資料
上傳您的推薦信 | 參考文獻 | 合作者 | 合作者
Mecklenburg, C.W., T.A. Mecklenburg and L.K. Thorsteinson, 2002. Fishes of Alaska. American Fisheries Society, Bethesda, Maryland. xxxvii +1037 p. (Ref. 43939)
CITES
Not Evaluated
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解剖學
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耗氧量
游泳類型
游泳速度
視覺色素
魚聲
疾病與寄生蟲
毒性 (LC50s)
身體成分
營養素
耗氧量
游泳類型
游泳速度
視覺色素
魚聲
疾病與寄生蟲
毒性 (LC50s)
遺傳學
基因組
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基於模型的估計
|
系統發育多樣性指數 (參考文獻 82804) |
PD50 = 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high]. |
| Bayesian length-weight | a=0.00129 (0.00059 - 0.00283), b=2.98 (2.79 - 3.17), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
|
營養階層 (參考文獻 69278) |
3.1 ±0.4 se; based on size and trophs of closest relatives |
|
回復力 (參考文獻 120179) |
低的, 最小族群倍增時間4.5 - 14 年 (tm=tmax=5). |
|
釣魚的脆弱性 (Ref. 59153) |
Moderate to high vulnerability (45 of 100). 🛈 |