Production of Australian freshwater crayfish in earthen-based systems using pelleted diets and forage crops as food

Jones, Paul, Chavez, Jose R. and Mitchell, Brad D. 2002, Production of Australian freshwater crayfish in earthen-based systems using pelleted diets and forage crops as food, Aquaculture international, vol. 10, no. 2, pp. 157-175.

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Title Production of Australian freshwater crayfish in earthen-based systems using pelleted diets and forage crops as food
Author(s) Jones, Paul
Chavez, Jose R.
Mitchell, Brad D.
Journal name Aquaculture international
Volume number 10
Issue number 2
Start page 157
End page 175
Publisher Kluwer Academic Publishers Group
Place of publication Dordrecht, Netherlands
Publication date 2002-03
ISSN 1573-143X
0967-6120
Keyword(s) cherax destructor (yabby)
earthen-based production
feeding
growth
Summary Juvenile Cherax destructor (commonly called theyabby) were cultured in earthen-based ponds and tanks for 70–105d, and were fed pellets and/or a forage crop of the perennialwhiteclover, Trifolium repens. Three supplementary feedingstrategies were evaluated. Yabby growth on pellets consistently exceeded (by67–159%) that obtained on clover. Base-line yields for extensiveproduction systems are around 400 kg ha–1. Thesupplementary addition of T. repens produced yields of 635kg ha–1 (in ponds) to 1086 kgha–1 (in tanks). The sequential addition of cut-cloverto tanks stimulated growth to levels approaching those achieved on pellets.Yabbies stocked into ponds at 17 m–2 and fed 33%protein pellets for 100 d, resulted in a yield of 1117 kgha–1.Pellet inputs at a rate of 129–249 g m–2(dry matter) and 38–83 g m–2 (protein) over70–100 d resulted in acceptable growth and feed utilisationindices. Clover inputs of 534–682 g m–2 (asdry matter) or 84–177 g m–2 (as protein)produced reasonable growth rates but poor feed utilisation indices. Aconsiderable quantity of the dry matter and protein content of clover waseitherinefficiently utilised or directed into other production pathways. In tanks,clover inputs from 113–296 g m–2 (drymatter) and 24–54 g m–2 (protein) weresufficient to maintain high growth rates for 4 weeks, while in ponds, inputs of21 g m–2 (dry matter) and 4.3 gm–2 (protein) were sufficient for 3 weeks. During theearly weeks of production no growth advantage was gained by providing pelletstoanimals cultured in forage-based systems. Forage depletion occurred after3–4 weeks and was probably a major growth limiting factor.
Language eng
Field of Research 070401 Aquaculture
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2002, Kluwer Academic Publishers
Persistent URL http://hdl.handle.net/10536/DRO/DU:30001688

Document type: Journal Article
Collection: School of Ecology and Environment
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