Project number: 1984-015
Project Status:
Completed
Budget expenditure: $0.00
Principal Investigator: John Kowarsky
Organisation: Curtin University
Project start/end date: 28 Dec 1986 - 31 Dec 1986
Contact:
FRDC

Objectives

1. Investigate the factors influencing the survival and growth of freshwater crayfish and build on data obtained over the past two years

Final report

Author: John Kowarsky
Final Report • 2017-09-29 • 3.54 MB
1984-015-DLD.pdf

Summary

In Western Australia, and now elsewhere, there has been considerable interest in marron farming for over two decades. Many schemes have come and gone and the highly optimistic attitude which once prevailed has gradually been replaced by a more realistic approach to marron aquaculture. While, for example, it was once considered that appropriate site selection would allow marron to be cultured to marketable size (120 g) on a yearly basis (Morrisey 1976), it was later realised that at least at intensive pond culture densities achievement of 120 g average weight in Western Australia was not possible even on a two-year schedule (Morrisey 1984(a)).

Most serious commercial interest in marron farming has been with pond and dam culture but there is still little clear evidence to the would-be marron farmer. Proposed management and pond designs are yet to be tested as full-scale enterprises. Reasons cited for the failure of many marron farming schemes include predation by birds and other animals, cannibalism, climatic and weather variability and extremes, and, increasingly, operator inexperience. Underlying such explanations is the fundamental fact that pond and dam ecosystems are extremely complex and unpredictable. There is a growing appreciation that marron are sensitive organisms which are intolerant of environmental extremes.

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