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April 21, 2014

Fiji

Comparison of Four Strains of Freshwater Prawns

 

From Abstract: Fiji has a small industry that produces the “Anuenue” (Hawaii) strain of freshwater prawn (Macrobrachium rosenbergii).  The performance of this strain has never been systematically evaluated in Fiji, and, recently, some Fijian farmers reported declines in its productivity.

 

In this study, researchers evaluated the relative performance of Macrobrachium rosenbergii strains from Malaysia, Indonesia and Vietnam against the “Anuenue” strain.  A total of 5,827 prawns were harvested after 143 days of growout.  Individual growth rates and relative survival of the Fiji strain were not statistically different from any of the introduced strains, but the Vietnam strain was superior to the Malaysia strain.  Genetic diversity showed significant differences in variability among strains, with the Malaysian strain displaying the lowest genetic diversity.  Females of the Indonesia strain reached sexual maturity earlier than other strains and were smaller.  This study suggests that Malaysian and Indonesian strains would constitute a poor choice for Fiji, whereas the Vietnam strain consistently performed well on all criteria measured. High variation among replicate ponds within strains unfortunately confounded among-strain variation.

 

Source: Aquaculture Research.  Experimental Evaluation of the Culture Performance of Three Exotic and a ‘Local’ Giant Freshwater Prawn (Macrobrachium rosenbergii, De Man 1879) Culture Strain in Fiji.  David A. Hurwood (email: d.hurwood@qut.edu.au, GPO Box 2434, Brisbane, Queensland 4001, Australia), Shalini Singh, Sudath T. Dammannagoda, Satya Nandlal and Peter B. Mather.  Volume 45, Issue 6, Pages 961 to 972.  May 2014.

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