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Rhinichthys osculus (Girard, 1856)

Speckled dace
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Rhinichthys osculus
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United States (contiguous states) country information

Common names: Speckled dace
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: bait: yes;
Comments: Most ubiquitous fish in western USA. Occurs in many isolated western drainages and has diversified tremendously. Treated as a complex of subspecies, but its morphological variations and distribution are poorly known. The following are protected as endangered subspecies: Rhinichthys osculus nevadensis in Ash Meadows, Nevada; Rhinichthys osculus oligoporus in Clover Valley, Nevada; Rhinichthys osculus lethoporus in Independence Valley, Nevada; and Rhinichthys osculus thermalis in Kendall Warm Springs, Wyoming. The Foskett speckled dace, Rhinichthys osculus subspecies, in Foskett Spring, Warner Basin, Oregon is also protected as threatened subspecies (Ref. 86798). Of some importance as forage species and widely used as bait fish. Also Ref. 5723. Status of threat of the following subspecies: 1). Rhinichthys osculus lariversi: endangered. Criteria: 1,4,5; 2). Rhinichthys osculus lethoporus, Rhinichthys osculus nevadensis, and Rhinichthys osculus oligoporus: endangered; status same as 1989. Criteria: 1,4,5; 3). Rhinichthys osculus moapae: threatened; status same as 1989. Criteria: 1,3,4; 4). Rhinichthys osculus reliquus: extinct. Criteria: 1,4,5; 5). Rhinichthys osculus thermalis: endangered; status declined since 1989. Criteria: 3,5 ; 6). Rhinichthys osculus velifer: endangered. Criteria: 1,5 (http://fisc.er.usgs.gov/afs/) (Ref. 81264).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/us.html
National Fisheries Authority: http://www.nmfs.gov
Occurrences: Occurrences Point map
Main Ref: Page, L.M. and B.M. Burr, 2011
National Database:

Common names from other countries

分类 / Names 俗名 | 同种异名 | Catalog of Fishes(, ) | ITIS | CoL | WoRMS | Cloffa

Teleostei > Cypriniformes (Carps) > Leuciscidae (Minnows) > Pogonichthyinae
Etymology: Rhinichthys: Greek, rhinos = nose + Greek, ichthys = fish (Ref. 45335);  osculus: osculus meaning small-mouthed (Ref. 1998).
  More on author: Girard.

Environment: milieu / climate zone / depth range / distribution range 生态学

; 淡水 居于水底的; pH range: 6.8 - 7.8; dH range: 5 - 25.   溫帶; 9°C - 11°C (Ref. 3672); 49°N - 31°N

分布 国家 | FAO区域 | 生态系 | 标本纪录 | Point map | 简介 | Faunafri

North America: western drainages (Pacific and endorheic) from Columbia River in British Columbia, Canada to Colorado River in Arizona and New Mexico, USA and south into Sonora, Mexico.
北美洲: 西方的流域 (太平洋與內流的) 從加拿大英屬哥倫比亞的哥倫比亞河到美國亞歷桑那州與新墨西哥州的科羅拉多河而且向南進入墨西哥順拿那。

大小 / 重量 / 年龄

Maturity: Lm ?  range ? - ? cm
Max length : 11.0 cm TL 雄鱼/尚未辨别雌雄; (Ref. 86798); common length : 6.3 cm TL 雄鱼/尚未辨别雌雄; (Ref. 12193)

简单描述 型态特徵 | 形态测量图

背棘 (总数): 0; 背的软条 (总数): 8-9; 臀棘 0; 臀鳍软条: 6 - 7; 脊椎骨: 37 - 38. Body elongate, greatest depth in front of dorsal fin. Head bluntly triangular, a small but distinct hump present behind the head. Mouth inferior, sucker-like, lower jaw with fleshy lip. Overall coloration gray or gray-brown with scattered and vague darker flecks, usually above midline of sides; lower sides and belly somewhat yellowish or creamy white. A faint lateral band present.
细长的身体, 在背鳍之前的最大高度。 头部钝地三角形的, 小但是明显的隆起出现在头部后面。 嘴下方的,像吸管一样的, 下颌有肉质的唇。 整体的颜色灰色或灰褐色有分散的与模糊的较深色的斑纹, 通常在侧边的中线之上; 下侧与腹面略微淡黄色或乳脂色的白色。 一个模糊的侧面条纹呈现。

生物学特性     字汇 (例如 epibenthic)

Occurs in rocky riffles, runs and pools of headwaters, creeks and small to medium rivers; rarely in lakes (Ref. 5723, 86798).

栖息于岩石的急流,河川源头的小支流与水潭,小溪及小型到中型河川; 极少在湖。 (参考文献 5723) 一些重要作为饵料鱼种而且广泛地在美国当作鱼饵使用鱼。

Life cycle and mating behavior 成熟度 | 繁殖 | 产卵场 | | 孕卵数 | 仔鱼

北美洲: 西方的流域 (太平洋與內流的) 從加拿大英屬哥倫比亞的哥倫比亞河到美國亞歷桑那州與新墨西哥州的科羅拉多河而且向南進入墨西哥順拿那。

主要参考文献 Upload your references | 参考文献 | 合作者 | 合作者

Page, L.M. and B.M. Burr, 2011. A field guide to freshwater fishes of North America north of Mexico. Boston : Houghton Mifflin Harcourt, 663p. (Ref. 86798)

世界自然保护联盟红皮书 (Ref. 130435)

  最不相关 (LC) ; Date assessed: 10 September 2018

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

对人类的威胁

  无害处的




人类利用

诱饵: usually
FAO(Publication : search) | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5020   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00501 (0.00232 - 0.01084), b=3.13 (2.94 - 3.32), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
营养阶层 (Ref. 69278):  2.9   ±0.36 se; based on food items.
回复力 (Ref. 120179):  高度, 族群倍增时间少于 15个月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).