Genetic Studies to Determine Stock Structure of Greater
Amberjack in the Gulf of Mexico and Southeastern (U.S)
Dr. John R.
Marine Fisheries Service, 9721 Executive Center Drive,
North Koger Building, St. Petersburg, FL 33702.
PHONE: (813) 570-5324
tissues were obtained between 1994 and 1996 from 444 greater
amberjack (Seriola dummerili) sampled from 11
offshore localities in the northern Gulf of Mexico (Gulf)
and along the U.S. southeast Atlantic coast (Atlantic).
Restriction sites of mitochondrial (mt) DNA from each
individual were surveyed by using a battery of 16 type-II
restriction enzymes. A total of 49 mtDNA haplotypes (genotypes)
were detected. Percent nucleotide-sequence divergence
among the haplotypes ranged from 0.156 to 2.623 (mean
+ S.E.=0.980+ 0.015). Nucleon diversity within samples
ranged from 0.845 to 0.906, and intrapopulational mtDNA
diversities ranged (mean+ S.D.) from 0.483+0.370 to 0.619+
0.419. The latter did not differ significantly
from one another.