
TY  - JOUR
A1  - Johnson, MS 
A1  - Hebbert, DR 
A1  - Moran, MJ 
T1  - Genetic analysis of populations of north-western Australian fish species
JF  - Marine and Freshwater Research
JO  - Mar. Freshwater Res.
Y1  - 1993
VL  - 44
IS  - 5
SP  - 673
EP  - 685
KW  - 
UR  - https://doi.org/10.1071/MF9930673 
N2  - Allozyme variation was used to investigate the genetic structure of Lutjanus sebae, Lethrinus nebulosus,  Lethrinus choerorynchus, and Epinephelus multinotatus, which are components of a multispecies fishery  off north-western Australia. Samples of each species were obtained from five or six localities, over a  total distance of 1400-2080 km. Allelic variation was found at 13-16 loci in each species. The consistent  picture to emerge was one of little genetic subdivision in all four species, with average values of FST  ranging from 0.003 in L. sebae to 0.012 in E. multinotatus. Although there was statistically significant  variation in allelic frequencies in three of the species, there were no clear geographical groupings of  populations. With the possible exception of clinal variation for aldehyde oxidase in E. multinotatus, all  heterogeneity of allelic frequencies was within the range that could easily be due to within-generation  effects of selection. Thus, the allozyme data are consistent with the view that there are extensive connections  of populations over large distances. The electrophoretic study also confirmed that, contrary to suggestions in  the literature, L. nebulosus, L. choerorynchus, and Lethrinus laticaudis are reproductively isolated species. 
ER  -

