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Geographic Variation in Opisthonema oglinum (Lesueur, 1818) in the Southeastern Brazilian Bight Inferred from Otolith Shape and Chemical Signatures

Title
Geographic Variation in Opisthonema oglinum (Lesueur, 1818) in the Southeastern Brazilian Bight Inferred from Otolith Shape and Chemical Signatures
Type
Article in International Scientific Journal
Year
2023
Authors
Vaz-dos-Santos, AM
(Author)
Other
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Rautenberg, KA
(Author)
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Augusto, CG
(Author)
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Ballester, ELC
(Author)
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Schwingel, PR
(Author)
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Pinto, E
(Author)
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Correia, AT
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Journal
Title: FishesImported from Authenticus Search for Journal Publications
Vol. 8
Final page: 234
Publisher: MDPI
Indexing
Other information
Authenticus ID: P-00Y-B5V
Abstract (EN): The thread herring Opisthonema oglinum (Lesueur, 1818) is a small pelagic fish distributed in the western margin of the Atlantic Ocean from the United States to Argentina. It is a target species for diverse commercial fisheries, including the Brazilian industrial purse seine fleets that operate in the Southeastern Brazilian Bight. To investigate the geographic variation in the thread herring populations in this fishing ground, sagittal otoliths were collected from two areas: Rio de Janeiro (RJ: 23 degrees 04' S, 44 degrees 03' W) and Santa Catarina (SC: 26 degrees 05' S, 48 degrees 180 W). Otolith shape analyses and multielemental signatures were statistically evaluated using elliptical Fourier descriptors and elemental/Ca ratios. Remarkable differences in the thread herring otoliths between the two areas were found. The previous scenario in which the thread herring constitutes a single panmictic population in the Atlantic Ocean is now debatable. The implications of these results in terms of rational fisheries management for this species are highlighted.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 18
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