Current status and potential contributions of fisheries statistics from artisanal fisheries for managing juvenile istiophorid billfishes in Southern Brazil

Wosnick, Natascha; Prado, Aline Cristina; Padilha, Érica; Musyl, Michael K.

doi:10.1007/s10641-021-01060-4

Cited by 2 publications

(1 citation statement)

References 30 publications

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“…Among these species, the sailfish ( Istiophorus platypterus ) is a highly migratory, circumtropical species characterized by its discernible sail-like dorsal fin, and like other billfishes (Istiophoridae and Xiphiidae), it inhabits a narrow range of environmental features preferring moderately warm and productive regions ( Reygondeau et al 2012 ; Thoya et al 2022 ). It is a valuable fishery resource and sport fish providing food security and income for developing and developed countries ( Kadagi et al 2020 ; Wosnick et al 2021 ). Given its socioeconomic relevance, the sailfish's stocks are managed in each ocean basin by different regional fisheries management organizations (RFMOs).…”

Section: Introductionmentioning

confidence: 99%

Seascape Genomics and Phylogeography of the Sailfish (Istiophorus platypterus)

Ferrette

Coimbra

Winter

et al. 2023

Genome Biology and Evolution

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Vast distances and permeable phylogeographic barriers characterize the open ocean, boosting gene flow and decreasing population structure and speciation of widely distributed and migratory species. However, many widely distributed species are formed by different populations throughout their distribution, evidencing our understanding of how the marine environment triggers population and species differentiation are insufficient. The sailfish is a circumtropical and highly migratory billfish that inhabits warm and productive areas. Despite its ecological and socioeconomic importance as a predator and fishery resource, the species is threatened by overfishing requiring innovative approaches to improve their management and conservation status. Thus, we presented an improved high-quality reference genome for the species and applied a seascape genomics approach to understand how marine environmental features may promote local adaptation and how it affects gene flow between populations. We delimit 2 populations between the Atlantic and Indo-Western Pacific oceans and detect 82 outlier loci correlated with sea surface temperature, salinity, oxygen, and chlorophyll concentrations. However, the most significant environmental feature that explains the differences between populations was isolation-by-distance. Sailfish populations were not inbred, although its genome-wide heterozygosity was lower for billfishes and marine fishes, evidencing the need to counteract overfishing effects. In addition, in a climate change scenario, management agencies must implement state-of-the-art sequencing methods, consider our findings in their management plans, and monitor genome-wide heterozygosity over time to improve sustainable fisheries and the long-term viability of its populations.

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