Roughhead grenadier (Macrourus berglax) fish species and information / pictures of Roughhead grenadier - Macrourus berglax

Roughhead grenadier (Macrourus berglax) fish species information

Scientific Name
Macrourus berglax

Common Name
Roughhead grenadier

Biology
Epibenthic, in deep waters down to 2740 (Ref. 58426). Adults are commonly found in about 300-500 m depth. Temperature preferences appear to range from about 1-4?C, although bottom temperatures below 0?C have been recorded at capture depths. Amphipods predominate in the diet, although polychaetes and various natant crustaceans are also important. Also feed on bivalves, isopods, echinoderms (notably ophiuroids), and ctenophores (Ref. 1371). Batch spawner (Ref. 51846).

Classification

Classified By

Lacep?de, 1801

Class

Ray-finned fishes (Actinopterygii)

Order

Cods (Gadiformes)

Family

Grenadiers or rattails (Macrouridae)

Distribution

Region

North Atlantic

Distribution

North Atlantic: Norfolk Canyon and George Bank north to Labrador, Davis Strait, eastern and western Greenland, Iceland, and from the Irish Atlantic slope north to Faeroe Islands, Norwegian coast, to Spitzbergen, and to the Barents Sea.

Range

82°N - 37°N, 95°W - 61°E

Environment

Climate

Temperate

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

100 m

Depth To - meters

1000 m

Zone

benthopelagic

Environment

Marine; benthopelagic; non-migratory; depth range 100 - 1000 m (Ref. 1371), usually 300 - 500 m (Ref. 54573)

Trophic Level

4.48 s.e. 0.77 Based on diet studies.

Occurs in Marine / Salt water

True

Occurs in Brackish water

False

Occurs in Fresh Water

False

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

110 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.5625 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: commercial

Vulnerability

High to very high vulnerability (75 of 100)

Resilience

Very Low, minimum population doubling time more than 14 years (tm=15; tmax=25; Fec=15,000)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated