Authors
Aisni Mayumi Corrêa de Lima Adachi, Ailton Amarante Ariza, Giovana da Silva Ribeiro, Pollyana Christine Gomes Roque, Matheus Marcos Rotundo, Marcelo Vianna, Gabriela Delpiani, Sergio Matias Delpiani, Juan Martín Díaz de Astarloa, Claudio Oliveira, Fausto Foresti, Vanessa Paes da Cruz
Published in
Animal genetics. Volume 57. Issue 2. Pages e70096.
Abstract
Assessing genetic structure across ocean basins is essential to understand connectivity and guide conservation in data-deficient open-water sharks. In this study, we examined the population genomics of Squalus cf. mitsukurii by analyzing tissue samples collected from two distant regions: California, USA (Pacific Ocean) and Pernambuco, Brazil (Southwestern Atlantic Ocean). Using double-digest restriction site-associated DNA sequencing (ddRADseq), we generated 33 480 939 raw reads across 28 individuals and retained 1118 high-quality single nucleotide polymorphisms (SNPs) after stringent filtering. Genetic diversity was moderate (He = 0.211-0.244), with low inbreeding levels (Fis = -0.005-0.106). DAPC and pairwise Fst analyses revealed moderate genetic structure, indicating limited gene flow between the sampled populations. This study provides the first genomic evidence of population differentiation in S. cf. mitsukurii across these regions. Our findings underscore the importance of genome-wide data and informing regionally conservation strategies, especially for exploited species commonly misidentified in commercial landings and lacking population management.
PMID:
41914645
Bibliographic data and abstract were imported from PubMed on 15 Sep 2026.
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