Koaro (Galaxias brevipinnis) fish species and information / pictures of Koaro - Galaxias brevipinnis

Koaro (Galaxias brevipinnis) fish species information

Scientific Name
Galaxias brevipinnis

Common Name
Koaro

Biology
Inhabits mainly clear streams, often deeply shaded and relatively fast-flowing, although it sometimes occurs in lakes, particularly in Tasmania. In New Zealand and parts of Tasmania, juveniles occur in marine waters, presumably the larvae are washed out to the sea. The existence of a marine stage is regarded to be facultative rather than obligatory in Australia. Swims near the bottom, usually around the cover of rocks and logs. More common in uploads (Snowy Mountains, Otway Ranges, central Tasmania) than at lower elevations (Ref. 44894).

Classification

Classified By

G?nther, 1866

Class

Ray-finned fishes (Actinopterygii)

Order

Smelts (Osmeriformes)

Family

Galaxiids (Galaxiidae)

Distribution

Region

Oceania

Distribution

Oceania: found in southeastern Australia in streams draining east and south from the Great Dividing Range; Flinders and King Islands in Bass Strait; widespread in Tasmania; also in New Zealand and the Chatham, Auckland and Campbell Islands.

Range

34°S - 53°S

Environment

Climate

Subtropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

benthopelagic

Environment

Marine; freshwater; brackish; benthopelagic; amphidromous (Ref. 51243)

Trophic Level

3.11 s.e. 0.40 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

28.0 cm

Common Length

15.0 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; bait: usually

Vulnerability

Low to moderate vulnerability (35 of 100)

Resilience

Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated