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Evaluation of weaning strategies for intensively reared Australian fish, Murray cod, Maccullochella peelii peelii
journal contribution
posted on 2007-12-01, 00:00 authored by S Ryan, B Smith, Bob Collins, Giovanni TurchiniThe Australian Murray cod supports a growing national industry. However, with regard to the process of weaning fry, there is a lack of information and optimal procedures need to be developed. The aim of the present investigation was to test the biological and economic efficacy of different weaning strategies for Murray cod. Three weaning strategies were tested on triplicate groups of fish: (1) only Artemia for 5 d, 7 d on Artemia plus starter diet, and 14 d on dry diet only; (2) 12 d on Artemia plus starter diet and 14 d on dry diet only; and (3) directly to dry diet for the entire experimental period. No significant differences were recorded in the growth and feed efficiency, while significantly higher mortality (38.4 ± 0.35%) was recorded in fish weaned directly onto dry diet. Fish subjected to the first 5 d on Artemia only showed a growth reduction during this period, which was compensated by a phase of enhanced growth during the dry-diet phase. No significant differences were noted in the proximate composition of fish under the different treatments. The economic evaluation suggested that the treatment with the simultaneous supply of Artemia and starter diet is preferable.
History
Journal
Journal of the world aquaculture societyVolume
38Issue
4Pagination
527 - 535Publisher
The societyLocation
Baton Rouge, La.Publisher DOI
ISSN
0893-8849Language
engNotes
Published Online: 19 Nov 2007Publication classification
C1 Refereed article in a scholarly journalCopyright notice
2007, WileyUsage metrics
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