Entosphenus macrostoma (Beamish, 1982)
Vancouver lamprey
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Entosphenus macrostoma
拍攝者 Canadian Museum of Nature, Ottawa, Canada
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拍攝者 Canadian Museum of Nature, Ottawa, Canada
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: 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).
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).
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. 126106). 溫帶; 48°N - 47°N
分布 領土 | FAO區域 | 生態系 | 發現紀錄 | 分布圖 | 簡介 | Faunafri
North America: southern Vancouver Island, British Columbia. Occurrence in USA needs confirmation (Ref. 2583).
北美洲: 溫哥華島南部，卑詩省。 在美國的發生需要證實。 (參考文獻 2583)
北美洲: 溫哥華島南部，卑詩省。 在美國的發生需要證實。 (參考文獻 2583)
大小 / 重量 / 年齡
成熟度: Lm ? range ? - ? cm
Max length : 27.3 cm TL 雄魚/尚未辨別雌雄; (Ref. 89241); 最大體重: 19.80 g (Ref. 89241); 最大年齡: 2.00 年 (Ref. 89241)
Max length : 27.3 cm TL 雄魚/尚未辨別雌雄; (Ref. 89241); 最大體重: 19.80 g (Ref. 89241); 最大年齡: 2.00 年 (Ref. 89241)
簡短描述 檢索表 | 型態特徵 | 形態測量圖
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.
Body shape (shape guide): eel-like.
Body shape (shape guide): eel-like.
Mature individuals spawn 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).
產卵於淡水湖中的淺礫石灘或流入湖的小溪溪口。 幼八目鰻在靜止的水域中出現在淤泥，泥或沙子。
產卵於淡水湖中的淺礫石灘或流入湖的小溪溪口。 幼八目鰻在靜止的水域中出現在淤泥，泥或沙子。
生命週期和交配行為 成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Semelparous (Ref. 89241).北美洲: 溫哥華島南部，卑詩省。 在美國的發生需要證實。 (參考文獻 2583)
主要參考資料
上傳您的推薦信 | 參考文獻 | 合作者 | 合作者
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 2025-2 (Global))
瀕危 (EN) (B1ab(iii)+2ab(iii)); Date assessed: 22 July 2015
CITES
Not Evaluated
對人類具威脅
無害處的
人類使用
漁業: 沒有興趣
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更多資訊
解剖學
鰓區
腦部
耳石
鰓區
腦部
耳石
生理學
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)
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
遺傳學
異種性
遺傳率
遺傳多樣性
基因組
遺傳學
異種性
遺傳率
遺傳多樣性
工具
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網路資源
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基於模型的估計
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系統發育多樣性指數 (參考文獻 82804) |
PD50 = 0.5156 [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). |
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營養階層 (參考文獻 69278) |
4.1 ±0.7 se; based on size and trophs of closest relatives |
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回復力 (參考文獻 120179) |
低的, 最小族群倍增時間4.5 - 14 年 (Semelparous species, assuming tm (= tmax) > 4). |
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釣魚的脆弱性 (Ref. 59153) |
Low vulnerability (14 of 100). 🛈 |