Scientific Name
Noturus nocturnus

Common Name
Freckled madtom

Biology
Inhabits sand-gravel riffles and runs near debris and among tree roots along undercut banks in creeks to large rivers (Ref. 5723, 10294). Feeds on aquatic insect immatures dominated by mayflies, caddisflies, midges, and blackflies (Ref. 10294).

Classification

Classified By

Jordan & Gilbert, 1886

Class

Ray-finned fishes (Actinopterygii)

Order

Catfish (Siluriformes)

Family

North American freshwater catfishes (Ictaluridae)

Distribution

Region

North America

Distribution

North America: Mississippi River basin from northern Illinois to Louisiana, and from eastern Kentucky to central Kansas and Oklahoma in the USA; Gulf Slope drainages from Mobile Bay in Alabama to Guadalupe River in Texas, USA.

Range

41°N - 30°N

Environment

Climate

Subtropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

demersal

Environment

Freshwater; demersal

Trophic Level

3.37 s.e. 0.44 Based on size and trophs of closest relatives

Occurs in Marine / Salt water

False

Occurs in Brackish water

False

Occurs in Fresh Water

True

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

15.0 cm

Common Length

4.6 cm

Phylogenetic Diversity Index

PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Unknown

Vulnerability

Low vulnerability (24 of 100)

Resilience

Medium, minimum population doubling time 1.4 - 4.4 years (tmax=4)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated