Genetic Assessment of the Spinner Dolphin (Stenella longirostris) in the Largest Offshore Sedimentary Basin in Brazil

Leal, Thaís; Cypriano‐Souza, Ana Lúcia; Simões‐Lopes, Paulo C.; Bonatto, Sandro L.; Kiszka, Jeremy J.; Ewing, Ruth Y.; Lache, Adam; Cartolano, Maria C.; Costa, Ana P. B.

doi:10.1111/mms.70021

i

Genetic Assessment of the Spinner Dolphin (Stenella longirostris) in the Largest Offshore Sedimentary Basin in Brazil

2025
By Leal, Thaís ; Cypriano‐Souza, Ana Lúcia ; Simões‐Lopes, Paulo C. ; ...

Details

Journal Title:

Marine Mammal Science
Personal Author:

Leal, Thaís ; Cypriano‐Souza, Ana Lúcia ; Simões‐Lopes, Paulo C. ; Bonatto, Sandro L. ; Kiszka, Jeremy J. ; Ewing, Ruth Y. ; Lache, Adam ; Cartolano, Maria C. ; Costa, Ana P. B.
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; SEFSC (Southeast Fisheries Science Center)
Description:

Assessing the genetic diversity of a population is critical to evaluate its resilience in the face of anthropogenic impacts. This study aimed to assess the genetic diversity and structure of the spinner dolphins Stenella longirostris that inhabit the Santos Basin (SB), south and southeast Brazil. Analyses were conducted using seven microsatellite loci and a 686 bp fragment of the mitochondrial DNA (mtDNA) control region. The genetic relationship between SB spinner dolphins with the island‐associated spinner dolphins of Fernando de Noronha and spinner dolphins distributed in the western North Atlantic, including the Wider Caribbean region, was also investigated through a 324 bp fragment of the mtDNA control region. Results indicate that the offshore group of spinner dolphins in the SB has high genetic diversity for both mtDNA and nuclear markers. Based on mtDNA, the SB group has moderate genetic connectivity to the western North Atlantic/Wider Caribbean region spinner dolphins, but high genetic differentiation from their closest neighbors (Fernando de Noronha). These findings indicate that although SB spinner dolphins occur in an area of strong anthropogenic impacts, they present a high level of neutral genetic variation, with subtle matrilineally derived structure in the offshore (not island‐associated) waters of the western Atlantic.
Source:

Marine Mammal Science (2025)
DOI:

https://doi.org/10.1111/mms.70021
ISSN:

0824-0469 ; 1748-7692
Format:

PDF
Publisher:

Wiley
Document Type:

Journal Article
License:

https://creativecommons.org/licenses/by-nc-nd/4.0/
Rights Information:

CC BY-NC-ND
Compliance:

Submitted
Main Document Checksum:

urn:sha-512:c588965df88bba935ac4932bb2185dfd6a7b7981c82eb83995839559dd99a19d50529efdf66b4e5023807d3ab00622cec4c0194d5a4db3b2bbe29c606d82808f
Download URL:

https://repository.library.noaa.gov/view/noaa/70552/noaa_70552_DS1.pdf
File Type:

[PDF - 2.44 MB ]

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