Allozyme variation in the
crustacean Artemia franciscana (Anostraca : Artemiidae) from the Great Salt
Lake in various experimental conditions
D.
Rodriguez, F. Correa, J. de la Rosa-Velez, R. Escobar, B. Cordero, Z.
Alvarez, R. Sanchez-2002
Revista de Biologica Tropical, 50(1): 87-95
(from Current Contents)
Abstract :
Starch gel electrophoresis was used to analyze the
allelic variability of four polymorphic loci (Lap-2, Lap-3, Pgm and Gpi)
from a single population of Artemia franciscana (Kellogg, 1906) from the
Great Salt Lake (Utah, USA), cultured under eight different experimental
conditions. The organisms were cultured to the adult stage under a 2x2x2
experimental design (22 and 30 C; 30 and 60 ppt salinity; and Dunaliella sp.
and Spirulina sp. as food). There were significant differences in allele
frequencies at each locus and the mean expected heterozygosity (He) varied
from 0.236 to 0.447. Therefore, the hypothesis of no allelic differences
among treatments is rejected. With relation to a possible correlation
between genetic variability and the phenotypic characteristics, the results
show that there is probably a synergic effect between the different
salinities and temperatures on the survival of heterozygous organisms in the
different loci.
(Univ Autonoma Baja Calif; Inst Invest Oceanologicas;
Carr Tijuana Ensenada Km 107,AP 453; Ensenada 22800; Baja California;
Mexico, e-mail of D. Rodriguez: diana@faro.ens.uabc.mx;
F. Correa: correa@faro.ens.uabc.mx;
J. de la Rosa-Velez: jdrosa@faro.ens.uabc.mx;
B. Cordero: bcordero@cicese.mx;
Z. Alvarez: zalvarez@funflc.org.ve;
R. Sanchez: rsanche@funflc.org.ve)