QUEENSLAND LUNGFISH

The 'Queensland lungfish', ''Neoceratodus forsteri'', also known as 'Burnett salmon' and 'barramunda', is the sole member of the family 'Ceratodontidae', and one of only six lungfish species that remain. Olive or dull brown in colour, it grows to about 150 cm in length, more commonly 100 cm.
It is native to the Burnett and Mary River systems of south-east Queensland, but has been introduced into other nearby rivers, including the Brisbane River. It prefers still or slow-flowing water with at least some aquatic vegetation on the banks, particularly deep pools.

Also known as the Australian lungfish, this creature normally uses its gills for respiration, but is also capable of taking in oxygen from the air when water quality is poor, or there are low dissolved oxygen levels, such as when water temperatures are high during summer. Unlike some other lungfish species Australian lungfish cannot survive the desiccation of their environment and require permanent water.
This species belongs to a very ancient group Sarcopterygii the fleshy-finned fishes which is over 400 million years old. Fossils of fish identical to ''N. forsteri'' have been dated at over 100 million years which makes this species one of the oldest extant vertebrate species.
Previously lungfish were considered to be the direct ancestors of amphibians, but now a common ancestor is recognised, although lungfishes did appear early in the history of vertebrates.
Spawning involves individual pairs of fish and complex behaviour, however, unlike other lungfish species Australian lungfish do not exhibit parental care. Larvae resemble tadpoles, and are poor swimmers at first. Metamorphosis occurs early, when the fish are only about 2 cm long. Juveniles are capable of rapid growth, growing at around 1 inches per month if feed well and given ideal water conditions. In several instances, captive reared young grew to 18 inches in little over 18 months of age. They have a long lifespan, however, sometimes living over eighty years.
Primarily carnivorous, the diet consists mainly of small fish, frogs and tadpoles and invertebrates, however they have on occasion been observed to consume some vegetable matter.

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Recent events

References

External links

Recent events

Proposed damming projects on both the Mary and Burnett rivers^[1] threatens the habitat of the remaining lungfish. The dams would change the flow of the rivers eliminating the slow shallow areas the fish need for spawning. Scientists worldwide have become involved in saving the habitat for these lungfish citing their evolutionary importance.^[2]

References

1. http://statements.cabinet.qld.gov.au/MMS/StatementDisplaySingle.aspx?id=47038
2. http://www.theaustralian.news.com.au/story/0,20867,19859367-30417,00.html


★ Freshwater Fishes of Australia, Allen, Gerald R., , , T.F.H. Publications, 1989,

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External links

★ Native Fish Australia - Australian Lungfish page

★ Help Save the Australian Lungfish

★ online petition for saving the Australian Lungfish