Genetic evidence for a single stock of the deep-sea teleost Beryx decadactylus in the North Atlantic Ocean as inferred from mtDNA control region analysis

Authors: Friess, C.; Sedberry, G. R.

Source: Journal of Fish Biology, Volume 78, Number 2, February 2011 , pp. 466-478(13)

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Abstract:

Mitochondrial control region sequences of 141 alfonsino Beryx decadactylus sampled off the coast of South Carolina were compared with 164 sequences from B. decadactylus collected in the Azores for inferring population structure and demographic history of this deep-water teleost in the North Atlantic Ocean. Analysis of molecular variance showed that 100% of the genetic variation was found within populations, indicating an absence of population structure (φ_ST = −0· 003). Neutrality tests and mismatch distribution analyses of pooled sequences suggested that B. decadactylus in the North Atlantic Ocean have undergone population expansion. These results may indicate that transatlantic gene flow occurs, possibly through passive drift of larvae or adult migration. The potential of a shared stock between the eastern and western North Atlantic Ocean will need to be considered if a directed fishery for B. decadactylus were to develop in the U.S.A.

Keywords: Azores; Berycidae; Blake Plateau; Charleston Bump; population structure; sequencing

Document Type: Regular paper

DOI: http://dx.doi.org/10.1111/j.1095-8649.2010.02857.x

Affiliations: 1: Gray's Reef National Marine Sanctuary, 10 Ocean Science Circle, Savannah, GA 31411, U.S.A.

Publication date: 2011-02-01