Restoring jungle perch stocks

Parentage analysis in Jungle Perch (Kuhlia ruprestris) to inform restocking programs

Leaders

Lisa Pope
Jenny Ovenden
Matthew Hoskin

Co-investigators

Jessica Morgan (University of Queensland)
Michael Hutchison (Bribie Island Research Centre, Queensland Government)

Overview

Jungle perch Kuhlia rupestris occur in coastal river systems along much of the Queensland coast in northern Australia. However, jungle perch have declined significantly or become locally extinct in many river systems in southern Queensland, from Mackay to the Gold Coast. Probable causes of these declines include barriers to fish migration, loss of riparian shading and changed flow regimes. Jungle perch are a popular target for recreational anglers and there has been considerable public pressure in recent years to address the decline of this much-prized species.

Jungle perch are being bred in captivity with the aim of releasing individuals back into the wild, restoring populations that have disappeared or declined in South East Queensland.The aim of this project was to assist the captive breeding program for this species.

Outcomes

In most tanks of brood stock, the majority of larvae were produced by a single pair of fish. There was some variation, however. In one tank, for example, all females produced larvae. As a single pair produces most of the offspring, Bribie Island researchers can be prepared to use a large number of tanks to produce offspring, ensuring that the maximum amount of genetic variation is maintained.

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