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Comparison of Brood Size and Juvenile Weight between a Blue Strain and Normal-Coloured Strains of the Australian Freshwater Crayfish Cherax Destructor Clark (Decapoda: Parastacidae)

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Abstract A blue strain of the yabby Cherax destructor albidus was compared to two normal-coloured strains of C. d. destructor and C. d. albidus for brood size and juvenile weight. Reproductive performance of the blue strain was found to be significantly poorer than the two normal-coloured strains. Similarly, the weight of newly independent juveniles was also found to be significantly lower for the blue strain. No differences were detected between the two normal-coloured strains in either reproductive performance or size of newly independent juveniles. The phenotypic differences between the blue strain and normal-coloured strains are most likely genetic. However, further studies are needed to investigate whether these differences are due to pleiotropy or inbreeding effects.

Affiliations: 1: School of Ecology and Environment, Deakin University, P.O. Box 423, Warrnambool, Australia 3280 (corresponding author (CMA)


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