Plant & Animal Genome V Conference
Town & Country Hotel, San Diego, CA, January 12-16, 1997.
PAG-V: P323 - MORFHOLOGIC AND BIOCHEMICAL-GENETIC VARIATION AMONG TWO WHITE SHRIMP <i>Penaeus setiferus</i> L. POPULATIONS FROM THE GOLF OF MEXICO
P323
MORFHOLOGIC AND BIOCHEMICAL-GENETIC VARIATION AMONG TWO WHITE SHRIMP Penaeus setiferus L. POPULATIONS FROM THE GOLF OF MEXICO
ARENA-ORTIZ, MARIA LETICIA(1), CARLOS ROSAS-VAZQUEZ(1), Georgina Espinosa-Lopez(2), Rogelio Diaz(2), Damir Hernandez(2), Mayelin Montalval(2)
1. Laboratorio de Ecofisiologia, Facultad de Ciencias, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, Mexico, D.F
2. Laboratorio de Bioquimica, Facultad de Biologia, Universidad de la Habana, Cuba
A genetic study was performed on white shrimp P. setiferus from continental platform adjacent to Terminos lagoon, Campeche and form Tuxpan river outlet, Veracruz. The study comprised morphologic and electrophoretic aspects. It was found that lenght of the fifth abdominal segment was a good estimator of tail weight without exoeskeleton. The feeding yield was higher in Ciudad del Carmen population than Tuxpan, whereas ratio was 1:1 in both populations. Four out of the 14 loci were found not in genetic equilibrium in Tuxpan population, but only one locus in Ciudad del Carmen population. In all cases unbalanced was due to heterocigotic deficit. The genetic frequency of Phosphoglucomutase, Esterase-3, Phosphatase-1 and Amylase were different between Tuxpan and Ciudad del Carmen populations. The Campeche population presented the highest variability, therefore it is the population with the lower homeostasis or physiological efficacy. The genic frequency was not related with sex and rostral tooth number.