Seascape Genomics of the Smooth Hammerhead Shark Sphyrna zygaena Reveals Regional Adaptive Clinal Variation DOI Creative Commons
D.F. Grobler, Juliana D. Klein, Matthew L. Dicken

et al.

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(12)

Published: Dec. 1, 2024

ABSTRACT Globally, hammerhead sharks have experienced severe declines owing to continued overexploitation and anthropogenic change. The smooth shark Sphyrna zygaena remains understudied compared other members of the family Sphyrnidae. Despite its vulnerable status, a comprehensive understanding genetic landscape lacking in many regions worldwide. present study aimed conduct fine‐scale genomic assessment within highly dynamic marine environment South Africa's coastline, using thousands single nucleotide polymorphisms (SNPs) derived from restriction site‐associated DNA sequencing (3RAD). A combination differentiation‐based outlier detection methods genotype‐environment association (GEA) analysis was employed . Subsequent assessments putatively adaptive loci revealed distinctive south east cline. Among these, notable correlations between variation sea‐surface dissolved oxygen salinity were evident. Conversely, 111,243 neutral SNP markers lack regional population differentiation, finding that remained consistent across various analytical approaches. These results provide evidence for presence differential selection pressures limited spatial range, despite high gene flow implied by selectively dataset. This offers insights regarding potential impacts response fluctuating environmental conditions circumglobally distributed

Language: Английский

Regional population and seascape genomics of the smooth hammerhead shark Sphyrna zygaena reveals adaptive clinal variation despite high gene flow DOI Open Access
D.F. Grobler, Juliana D. Klein, Matthew L. Dicken

et al.

Authorea (Authorea), Journal Year: 2024, Volume and Issue: unknown

Published: June 3, 2024

Globally, hammerhead sharks have experienced severe declines owing to continued overexploitation and anthropogenic change. The smooth shark Sphyrna zygaena remains comparatively understudied compared other members of the family Sphyrnidae, despite its Vulnerable status, a comprehensive understanding genetic landscape lacking. present study aimed conduct fine-scale genomic assessment within highly dynamic marine environment South Africa’s coastline, using thousands single nucleotide polymorphisms (SNPs) derived from restriction site-associated DNA sequencing (3RAD). A combination differentiation-based outlier detection methods (OUTFlank pcadapt) Genotype-Environment Association (GEA) (Redundancy Analysis) analysis in were employed. Subsequent assessments putatively adaptive loci revealed distinctive south east cline. Amongst these, notable correlations between variation sea-surface dissolved oxygen salinity, addition spatial factors evident. Conversely, 110, 965 neutral SNP markers lack regional population differentiation, finding that remained consistent across various analytical approaches, including an isolation-by-distance (IBD) isolation-by-environment (IBE), clustering analyses (LEA, fastSTRUCTURE, find.clusters), discriminant principal components (DAPC). These results provide evidence for presence differential selection pressures limited range, high gene flow implied by selectively dataset. This offers insights regarding potential impacts response fluctuating environmental conditions circumglobally distributed zygaena.

Language: Английский

Citations

0
Sustained Fishing Threatens Globally Protected Species: Insights from Digital Catch and Genomic Data DOI Creative Commons
Iris Segura, Christopher Moore, Michael McCoy

et al.

Global Ecology and Conservation, Journal Year: 2024, Volume and Issue: unknown, P. e03337 - e03337

Published: Dec. 1, 2024

Language: Английский

Citations

0
Seascape Genomics of the Smooth Hammerhead Shark Sphyrna zygaena Reveals Regional Adaptive Clinal Variation DOI Creative Commons
D.F. Grobler, Juliana D. Klein, Matthew L. Dicken

et al.

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(12)

Published: Dec. 1, 2024

ABSTRACT Globally, hammerhead sharks have experienced severe declines owing to continued overexploitation and anthropogenic change. The smooth shark Sphyrna zygaena remains understudied compared other members of the family Sphyrnidae. Despite its vulnerable status, a comprehensive understanding genetic landscape lacking in many regions worldwide. present study aimed conduct fine‐scale genomic assessment within highly dynamic marine environment South Africa's coastline, using thousands single nucleotide polymorphisms (SNPs) derived from restriction site‐associated DNA sequencing (3RAD). A combination differentiation‐based outlier detection methods genotype‐environment association (GEA) analysis was employed . Subsequent assessments putatively adaptive loci revealed distinctive south east cline. Among these, notable correlations between variation sea‐surface dissolved oxygen salinity were evident. Conversely, 111,243 neutral SNP markers lack regional population differentiation, finding that remained consistent across various analytical approaches. These results provide evidence for presence differential selection pressures limited spatial range, despite high gene flow implied by selectively dataset. This offers insights regarding potential impacts response fluctuating environmental conditions circumglobally distributed

Language: Английский

Citations

0