Entosphenus macrostoma (Beamish, 1982)
Vancouver lamprey
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Entosphenus macrostoma
图片提供人 Canadian Museum of Nature, Ottawa, Canada
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图片提供人 Canadian Museum of Nature, Ottawa, Canada
分类 / 名称 俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Petromyzonti > Petromyzontiformes (Lampreys) > Petromyzontidae (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).
环境：氛围 / 气候带 / 深度上下限 / 分布范围 生态学
; 淡水 居于水底的; 河川洄游 (Ref. 126106). 溫帶; 48°N - 47°N
分布 领土 | FAO区域 | 生态系 | 标本纪录 | 分布图 | 简介 | 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 / 年龄
成熟度: Lm ? range ? - ? cm
Max length : 27.3 cm TL 雄鱼/尚未辨别雌雄; (Ref. 89241); 最大体重: 19.80 g (Ref. 89241); 最大年龄: 2.00 年 (Ref. 89241)
Max length : 27.3 cm TL 雄鱼/尚未辨别雌雄; (Ref. 89241); 最大体重: 19.80 g (Ref. 89241); 最大年龄: 2.00 年 (Ref. 89241)
简单描述 检索表 | 型态特徵 | 形态测量图
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).
产卵于淡水湖中的浅砾石滩或流入湖的小溪溪口。 幼八目鳗在静止的水域中出现在淤泥，泥或沙子。
产卵于淡水湖中的浅砾石滩或流入湖的小溪溪口。 幼八目鳗在静止的水域中出现在淤泥，泥或沙子。
生命周期和交配行为 成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
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)
主要参考文献
上传您的参考资料 | 参考文献 | 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)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-2 (Global))
濒危 (EN) (B1ab(iii)+2ab(iii)); Date assessed: 22 July 2015
CITES
Not Evaluated
对人类的威胁
无害处的
人类利用
渔业: 没有兴趣
FAO - Publication: search | FishSource |
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基因组
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网络资源
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基于模型的估算
|
系统发育多样性指数 (参考文献 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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营养阶层 (参考文献 69278) |
4.1 ±0.7 se; based on size and trophs of closest relatives |
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回复力 (参考文献 120179) |
低的, 最小族群倍增时间4.5 - 14 年 (Semelparous species, assuming tm (= tmax) > 4). |
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渔业脆弱性 (Ref. 59153) |
Low vulnerability (14 of 100). 🛈 |