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Genetics of growth and metabolic physiology in deep-sea scallops, Placopecten magellanicus (Gmelin) (Mollusca: Bivalvia) (Abstract)
Volckaert, F.A.M.J.; Zouros, E. (1989). Genetics of growth and metabolic physiology in deep-sea scallops, Placopecten magellanicus (Gmelin) (Mollusca: Bivalvia) (Abstract), in: De Pauw, N. et al. (Ed.) Aquaculture: a biotechnology in progress: volume 1. pp. 593
In: De Pauw, N. et al. (1989). Aquaculture: a biotechnology in progress: volume 1. European Aquaculture Society: Bredene. ISBN 90-71625-03-6. 1-592 pp.
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Documenttype: Congresbijdrage
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| Auteurs | | Top |
- Volckaert, F.A.M.J.
- Zouros, E.
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| Abstract |
The hypothesis that phenotypic traits are correlated with multiple-locus heterozygosity in healthy and stressed juvenile deep-sea scallops was tested: a sample of 283, 10-month old scallops, was collected in Passamaquoddy Bay (NB, Canada) and transferred to the laboratory. All animals were measured and assayed at six polymorphic loci (MPI, 6-PGD, ODH, PGI, GOT, and PGM) with starch gel electrophoresis. A subsample of 99 animals was immediately assayed for respiration and excretion rate, and carbohydrate content. A second subsample of 95 animals was deprived of food for 4 weeks and then assayed in the same way as the first subsample. Growth and multiple-locus heterozygosity were weakly positively correlated. Stressed scallops were distinguished from healthy animals by a reduced ash-free dry weight, a lower respiration rate, a higher excretion rate, a shift towards protein metabolism, and a reduced carbohydrate content. No significant statistical effect of multiple-locus heterozygosity on the physiological traits measured could be found, be it for healthy or stressed animals. It is suggested that in general only selected phenotypic traits (such as growth rate and protein turnover) are suitable for correlation studies with allelic variation, and that allelic variation is indicative of variation of the genome located closely to the marker enzyme (associative overdominance). |
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