Eastern mudminnow (Umbra pygmaea) fish species and information / pictures of Eastern mudminnow - Umbra pygmaea

Eastern mudminnow (Umbra pygmaea) fish species information

Scientific Name
Umbra pygmaea

Common Name
Eastern mudminnow

Biology
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).

Classification

Classified By

DeKay, 1842

Class

Ray-finned fishes (Actinopterygii)

Order

Pikes and Mudminnows (Esociformes)

Family

Mudminnows (Umbridae)

Distribution

Region

North America

Distribution

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).

Range

42°N - 30°N

Environment

Climate

Temperate

Water Temperature From

4 °C

Water Temperature To

23 °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

demersal

Environment

Freshwater; ; pH range: 6.0 - 6.5; dH range: 3 - 8 demersal; non-migratory

Trophic Level

3.25 s.e. 0.39 Based on food items.

Occurs in Marine / Salt water

False

Occurs in Brackish water

False

Occurs in Fresh Water

True

Occurs on Reefs

False

Is kept in Aquariums

True

Physical Size and Genetics

Maximum Length

11.5 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.6331 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: of no interest; aquarium: commercial

Vulnerability

Low to moderate vulnerability (28 of 100)

Resilience

Medium, minimum population doubling time 1.4 - 4.4 years (tm=1.5-2; Ave. Fec=342)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated