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Sharpnose hammer croaker (Johnius borneensis) fish species and information / pictures of Sharpnose hammer croaker - Johnius borneensis

Sharpnose hammer croaker (Johnius borneensis) fish species information

Scientific Name
Johnius borneensis

Common Name
Sharpnose hammer croaker

Biology
Inhabits shallow coastal waters, estuaries, and rivers. In India, matures at the size of 14 to 16 cm TL; attains an average size of 15.8 cm TL, 20.6 cm TL, and 24 cm TL, at the end of 1 year, 1.5 years and 2 years, respectively. Juveniles prefer crustaceans and as they grow , show piscivorous tendency (Ref. 9772). Marketed fresh and dried salted (Ref. 3490).

Classification

Classified By

Bleeker, 1851

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Drums or croakers (Sciaenidae)

Distribution

Region

Indo-West Pacific

Distribution

Indo-West Pacific: Persian Gulf eastward to southern China and Taiwan and northern and northeastern Australia and New Guinea.

Range

30°N - 36°S, 32°E - 155°E

Environment

Climate

Tropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

0 m

Depth To - meters

132 m

Zone

benthopelagic

Environment

Marine; freshwater; brackish; benthopelagic; depth range 0 - 132 m (Ref. 57178)

Trophic Level

3.14 s.e. 0.35 Based on diet studies.

Occurs in Marine / Salt water

True

Occurs in Brackish water

True

Occurs in Fresh Water

True

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

34.8 cm

Common Length

20.0 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: minor commercial

Vulnerability

Low vulnerability (22 of 100)

Resilience

High, minimum population doubling time less than 15 months (K=0.5-0.8)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated