Scientific Name
Trachurus lathami

Common Name
Rough scad

Biology
Coastal pelagic and demersal over continental shelves (Ref. 5217). Rare in oceanic insular areas (Ref. 5217). Juveniles associate with the jellyfish Chrysaora lactea in Southwestern Atlantic. Preyed on by juvenile comb grouper (Mycteroperca acutirostris) when protection given by the jellyfish fails (Ref. 52493). Often in schools. Feeds on small invertebrates. Marketed fresh locally and considered a good food fish (Ref. 9626). In southern Brazil found in 147 m depth (Ref. 47377).

Classification

Classified By

Nichols, 1920

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Jacks and pompanos (Carangidae)

Distribution

Region

Western Atlantic

Distribution

Western Atlantic: Canada (Ref. 5951) to Maine, USA and northern Gulf of Mexico to northern Argentina; apparently rare in the West Indies.

Range

45°N - 37°S

Environment

Climate

Subtropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

30 m

Depth To - meters

200 m

Zone

reef-associated

Environment

Marine; reef-associated; depth range 30 - 200 m (Ref. 5951)

Trophic Level

3.99 s.e. 0.18 Based on diet studies.

Occurs in Marine / Salt water

True

Occurs in Brackish water

False

Occurs in Fresh Water

False

Occurs on Reefs

True

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

40.0 cm

Common Length

30.0 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

Fisheries: commercial

Vulnerability

Moderate vulnerability (37 of 100)

Resilience

Medium, minimum population doubling time 1.4 - 4.4 years (K=0.16; tm=2)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated