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Umbra pygmaea  (DeKay, 1842)

Eastern mudminnow
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Native range | All suitable habitat
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Umbra pygmaea   AquaMaps   Data sources: GBIF OBIS
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分类 / Names 俗名 | 同种异名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii 辐鳍鱼纲 (条鳍鱼) > Esociformes (Pikes and mudminnows) > Umbridae (Mudminnows)
Etymology: Umbra: Latin, umbra, -ae = shadow, in the sense of phantom; due to its quick movements (Ref. 45335).

环境 / 气候 / 范围 生态学

; 淡水 居于水底的; pH range: 6.0 - 6.5; dH range: 3 - 8; 非迁移的.    4°C - 23°C (Ref. 1672), preferred ?; 42°N - 30°N

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North America: Atlantic and Gulf slopes from southeastern New York (including Long Island) to St.Johns River drainage in Florida and west to Aucilla River drainage in Florida and Georgia, USA (Ref. 5723). Introduced (but very localized) to central and western Europe (Ref. 59043).

Length at first maturity / 大小 / 重量 / 年龄

Maturity: Lm 3.7  range ? - ? cm
Max length : 13.7 cm TL 雄鱼/尚未辨别雌雄; (Ref. 88166); 15.0 cm TL (female)

简单描述 型态特徵 | 形态测量图

背棘 (总数): 0; 背的软条 (总数): 14-15; 臀棘 0; 臀鳍软条: 8 - 11. Body robust, thick, little compressed; head bluntly conic; snout short, equal to diameter of eye; mouth moderate, jaws short, mandible protrudes slightly beyond tip of upper jaw, premaxillaries not protractile. Gill rakers short and numerous. Dorsal inserted near pectoral than caudal base; pelvic inserted just before origin of dorsal , rays of depressed fin reaching to about 3rd anal ray. Caudal fin rounded, with 18-20 rays (Ref. 2196). Pigmentation: yellowish green with 10-12 narrow lateral dark stripes; a dark stripe through eye; a black basicaudal bar; lower jaw pale; fins plain. Also Ref. 40476.

生物学特性     字汇 (例如 epibenthic)

Inhabits quiet streams, sloughs, swamps and other wetlands over sand, mud and debris, often among dense vegetation. Juveniles also found among aquatic vegetation, often forming schools of 10-12 individuals (Ref. 39069). An introduced species in Europe which usually occurs in small isolated ponds and peat bogs (Ref. 59043). Oviparous, larvae remain in algal nest for about 6 days (Ref. 39067). Spawning takes place in April and May (Ref. 30578). Feeds on insect larvae, worms, mollusks, crustaceans alevins. Experimental studies show that this species can tolerate acidic environment, particularly, at ph values ranging from 4.0 to 7.0 where no mortality or significant changes in blood plasma osmolarity and haematocrit was observed (Ref. 59260).

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


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, 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. 115185)

CITES (Ref. 94142)

Not Evaluated

对人类的威胁

 




人类利用

渔业: 没有兴趣; 水族馆: 商业性
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