Flanders Marine Institute

Platform for marine research

In:

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
report an error in this recordbasket (1): add | show Printer-friendly version

one publication added to basket [68495]
Genetic and reproductive differentiation of Artemia franciscana in a new environment
Kappas, I.; Abatzopoulos, T.J.; Van Hoa, N.; Sorgeloos, P.; Beardmore, J.A. (2004). Genetic and reproductive differentiation of Artemia franciscana in a new environment. Mar. Biol. (Berl.) 146(1): 103-117. dx.doi.org/10.1007/s00227-004-1420-9
In: Marine Biology. Springer: Berlin. ISSN 0025-3162, more
Peer reviewed article

Also published as
  • Kappas, I.; Abatzopoulos, T.J.; Van Hoa, N.; Sorgeloos, P.; Beardmore, J.A. (2005). Genetic and reproductive differentiation of Artemia franciscana in a new environment, in: (2005). VLIZ Coll. Rep. 33-34(2003-2004). VLIZ Collected Reprints: Marine and Coastal Research in Flanders, 33-34: pp. chapter 80, more

Available in Authors 

Keywords
    Genetic diversity; Reproductive cycle; Artemia franciscana Kellog, 1906 [WoRMS]; Marine; Brackish water

Authors  Top 
  • Kappas, I.
  • Abatzopoulos, T.J.
  • Van Hoa, N.
  • Sorgeloos, P., more
  • Beardmore, J.A.

Abstract
    The nature and speed of intraspecific genetic differentiation between the Artemia population native to San Francisco Bay (SFB) and populations resulting from introduction of SFB material into Vietnam (Vinh Chau, VC) have been investigated from a multidisciplinary perspective using reproductive characters, allozymes and mitochondrial DNA. Rapid divergence between SFB and VC Artemia is evident from an analysis of five reproductive traits at the temperatures of 26°C and 30°C. The VC strain seems to be better adapted to high temperature, as gauged by the significantly higher reproductive output displayed compared with SFB Artemia. Analysis of variance confirms the existence of a strong genetic component involved in the determination of encystment. Allozyme analysis (20 loci) of the same strains reveals considerable genetic differences between samples, cultured at the above temperatures. Combined probability values for tests of allele frequency homogeneity pooled over all polymorphic loci, at 30°C as well as between temperatures, are 0.015 and 0.026, respectively. In addition, cluster analysis shows evidence of differentiation of Vietnamese Artemia from the wild (SFB) stock as early as within a year after inoculation. Mitochondrial DNA RFLP markers show similar patterns of genetic differentiation to those seen with allozymes and reproductive traits. However, unlike allozymes, there is strong evidence of a reduction in haplotype diversity from 40.6% in SFB Artemia to 10.5% in the established VC strain. Although genetic drift could account for much of the depletion in gene diversity, firm indications are obtained of selective forces shaping the gene pool in the tropical conditions of Vietnam. The brine shrimp is an invaluable genetic system for fine-scale studies of microevolutionary divergence, and multidisciplinary studies are likely to be of both fundamental and practical value for such inquiries.

 Top | Authors