Genetic structure and congeneric range overlap among sharpnose sharks (genus Rhizoprionodon) in the Northwest Atlantic Ocean

Matthew M Davis,Pablo de Jesús Suárez-Moo,T. Daly-Engel

Published 2019 in Canadian Journal of Fisheries and Aquatic Sciences

ABSTRACT

Sharpnose sharks (genus Rhizoprionodon) experience extensive fishing pressure throughout their ranges in the Atlantic Ocean. As such, it is important to understand the degree to which intraspecific populations interact across a spatial gradient. The Atlantic sharpnose shark (Rhizoprionodon terraenovae) and Caribbean sharpnose shark (Rhizoprionodon porosus) share a similar appearance and spatial presence within the Gulf of Mexico, though until recently only R. terraenovae was observed north of the Bahamas. We assessed the population structure of R. terraenovae using the mitochondrial control region (650 bp). Our results indicate significant genetic structure (FST = 0.049, P < 0.001; ΦST = 0.017, P = 0.008) between the Gulf of Mexico and the rest of the Atlantic. In addition, we observed R. porosus outside their known range, in South Carolina, Virginia, and northern Florida. Given the overlapping range with R. terraenovae, we assessed the potential for congeneric hybridization with the addition of the nuclear ribosomal internal transcribed spacer 2 gene (1260 bp). Results designate these specimens to be true R. porosus specimens, indicating the need for reevaluation of this species’ range.

PUBLICATION RECORD

  • Publication year

    2019

  • Venue

    Canadian Journal of Fisheries and Aquatic Sciences

  • Publication date

    2019-07-01

  • Fields of study

    Biology, Environmental Science

  • Identifiers
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

CITATION MAP

EXTRACTION MAP

CLAIMS

  • No claims are published for this paper.

CONCEPTS

  • No concepts are published for this paper.

REFERENCES

Showing 1-47 of 47 references · Page 1 of 1

CITED BY

Showing 1-11 of 11 citing papers · Page 1 of 1