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💧 Freshwater Least Concern 🌡️ Temperate

Eastern mudminnow

Umbra pygmaea DeKay, 1842
Max Length
13.7 cm
Max Weight
-
Lifespan
-
Trophic Level
3.3
Depth
-
Climate
Temperate
Resilience
Medium
Vulnerability
28.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Facultative air-breathing ; Adults inhabit 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 . An introduced species in Europe which usually occurs in small isolated ponds and peat bogs . Oviparous, larvae remain in algal nest for about 6 days . Spawning takes place in April and May . Adults feed 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 .

Scientific Name
Umbra pygmaea
Authority
DeKay, 1842
Habitat
Freshwater
Climate
Temperate
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
13.7 cm
Trophic Level
3.3
Resilience
Medium
Vulnerability
28.00/100
Migration
Non-migratory
Water Temp
4–23 °C
Salinity
0–0.5 ppt

🔬 Taxonomy

Kingdom
Animalia
Phylum
Chordata
Class
Teleostei
Teleostei
Order
Esociformes
Esociformes
Family
Umbridae
Umbridae
Genus
Umbra
Umbra
Species
Eastern mudminnow
Umbra pygmaea

🐟 Physical Description

Dorsal spines (total): 0; Dorsal soft rays (total): 14 - 15; Anal spines: 0; Anal soft rays: 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 . 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.: fusiform / normal; Cross section: compressed.

🌀 Behaviour

Behavioural data for Eastern mudminnow is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

Size at Maturity
3.7cm TL

🌍 Habitat & Distribution

Freshwater; demersal; pH range: 6.0 - 6.5; dH range: 3 - 8; non-migratory . Temperate; 4°C - 23°C ; 42°N - 30°N North America: Atlantic and Gulf slopes from southeastern New York (including Long Island) to St.

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Migration
Non-migratory
Trophic Level
3.3±0.39
🐠 Schooling
Food Items

insect larvae, worms, mollusks, crustaceans alevins

📐 Morphometrics

Length–Weight Relationship: W = 0.01 × L3.11 (TL)
Max TL
13.7cm
Dorsal Rays
15
Anal Rays
10

🌡️ Water Parameters & Tolerance

Temperature Range
4–23°C
pH Range
6–6.5
Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2012

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
28.00/100
Low vulnerability
Trophic Level
3.3
Predator
Body Shape
Fusiform / normal
Climate Zone
Temperate
Described By
DeKay, 1842

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Eastern mudminnow · eastern mudminnow, striped mudminnow · Mud minnow · mud-minnow
🌍CES blatňák menší
🇩🇰Danish Lille hundefisk
🇩🇪German Amerikanischer Hundsfisch · Kleiner Hundsfisch · Ostamerikanischer Hundsfisch
🌍EST kääbus-koerkala
🇫🇮Finnish pikkukoirakala · Pikkukoitakala
🇫🇷French L'Umbre pygmée · mud-minnow · Petit poisson chien · poisson-chien americain · Umbre pygmée · Umbre pygmée, Poisson chien
🇳🇱Dutch Amerikaanse hondsvis · Hondsvis
🌍NOB liten hundefisk
🇵🇱Polish Muławka wschodnioamerykańska
🌍RON Tiganus
🇷🇺Russian Карликовая евдошка
🇸🇪Swedish dvärghundfisk
🇨🇳Chinese 矮蔭魚

Scientific Synonyms

Scientific Name Author Year Status
Fundulus fuscus Ayres 1843 Synonym
Leuciscus pygmaeus DeKay 1842 Homotypic
Melanura annulata Agassiz 1853 Synonym
Umbra limi pygmaea DeKay 1842 Synonym
Umbra pygmae DeKay 1842 Synonym
Umbra pygmaea bilineata Shufeldt 1917 Synonym
Umbra pygmea DeKay 1842 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 100 records indexed .

Occurrence density from GBIF View GBIF records ↗

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