A GENETIC PERSPECTIVE ON ATLANTIC SAILFISH STOCK STRUCTURE (original) (raw)
The genetic basis of stock structure of Atlantic sailfish ( Istiophorus platypterus) was investigated using analyses of the mitochondrial control region and three nuclear microsatellite loci. Relatively robust samples (n= 293) from 6 locations throughout the Atlantic were screened for variation at these four hypervariable gene regions. While considerable variation was revealed, almost all of the variation was present in individual samples. The null hypothesis that samples were drawn from a common gene pool could not be rejected when each sample location was considered separately, or when collections were combined into eastern and western Atlantic samples. The apparent genetic homogeneity reinforces recent reports on the distribution of sailfish across the Atlantic and calls to question the current application of eastern and western Atlantic stocks.
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