Whole Genome Sequencing Reveals Substantial Genetic Structure and Evidence of Local Adaptation in Alaskan Red King Crab DOI Creative Commons
Carl A. St. John, Laura E. Timm, Kristen M. Gruenthal

et al.

Evolutionary Applications, Journal Year: 2024, Volume and Issue: 18(1)

Published: Dec. 31, 2024

ABSTRACT High‐latitude ocean basins are the most productive on earth, supporting high diversity and biomass of economically socially important species. A long tradition responsible fisheries management has sustained these species for generations, but modern threats from climate change, habitat loss, new fishing technologies threaten their ecosystems human communities that depend them. Among species, Alaska's charismatic megafaunal invertebrate, red king crab, faces all three declined substantially in many parts its distribution. Managers have identified stock structure local adaptation as crucial information to help understand declines how potentially reverse them, with regulation possible enhancement. We generated low‐coverage whole genome sequencing (lcWGS) data crabs five regions: The Aleutian Islands, eastern Bering Sea, northern Gulf Alaska, Southeast Alaska. used millions genetic markers lcWGS build previous studies population Alaska < 100 investigate adaptation. found each regions formed own distinct clusters, some containing subpopulation structure. Most notably, we Sea were significantly differentiated, something had not been previously documented. Inbreeding region was low a concern management. patterns consistent several chromosomes one particularly strong signal chromosome 100. At this locus, harbors variation could facilitate environment. Our findings support current practice managing crab at regional scale, they strongly favor sourcing broodstock target if enhancement is considered avoid mismatch.

Language: Английский

Putting Structural Variants Into Practice: The Role of Chromosomal Inversions in the Management of Marine Environments DOI Creative Commons
Nadja M. Schneller, Jan M. Strugnell, Matthew A. Field

et al.

Molecular Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: May 8, 2025

ABSTRACT Major threats to marine species and ecosystems include overfishing, invasive species, pollution climate change. The changing not only imposes direct through the impacts of severe heatwaves, cyclones ocean acidification but also complicates fisheries management by driving range shifts. dynamic nature these means that future our oceans will depend on ability adapt. This has led calls for genetic interventions focussed enhancing species' adaptive capacity, including translocations, restocking selective breeding. Assessing benefits risks such approaches requires an improved understanding architecture variation, in relation climate‐resilient phenotypes locally adapted populations fitness hybrids. Large structural variants as chromosomal inversions play important role local adaptation linking multiple loci. Consequently, are likely be particularly when managing capacity. However, under some circumstances, they accumulate deleterious mutations, potentially increasing risk inbreeding depression. Genetic takes account dual roles is more effective at ensuring population persistence. We summarise evolutionary factors influencing variation inversions, review found taxa, provide a framework predict consequences ignoring key scenarios. conclude describing practical methods bridge gap between theory application conservation.

Language: Английский

Citations

0
Range-wide contrast in management outcomes for transboundary Northeast Pacific sablefish DOI
Maia Kapur, Melissa A. Haltuch, Brendan Connors

et al.

Canadian Journal of Fisheries and Aquatic Sciences, Journal Year: 2024, Volume and Issue: 81(7), P. 810 - 827

Published: March 12, 2024

Sablefish ( Anoplopoma fimbria) of the Northeast Pacific support a highly mobile, valuable fishery resource currently managed as three separate populations. Recent work has shown sablefish to be genetically mixed; have high movement rates; and synchronous biomass trends, including recent declines. A management strategy evaluation was developed with stakeholders scientists from regions investigate whether spatially structured paradigms might result in better conservation economic outcomes. The includes transboundary operating model represent spatial population dynamics delay–difference estimation method varying complexities potential stratifications, harvest control rules. Mismatches scale underlying biological units pose crucial risk localized depletion southern U.S. West Coast. This study presents one first transboundary, spatially-explicit evaluations conditioned actual data. These results underscore importance tools implications when regional is conducted isolation. Future should incorporate additional hypotheses drivers recruitment patterns range-wide.

Language: Английский

Citations

0
Whole Genome Sequencing Reveals Substantial Genetic Structure and Evidence of Local Adaptation in Alaskan Red King Crab DOI Creative Commons
Carl A. St. John, Laura E. Timm, Kristen M. Gruenthal

et al.

Evolutionary Applications, Journal Year: 2024, Volume and Issue: 18(1)

Published: Dec. 31, 2024

ABSTRACT High‐latitude ocean basins are the most productive on earth, supporting high diversity and biomass of economically socially important species. A long tradition responsible fisheries management has sustained these species for generations, but modern threats from climate change, habitat loss, new fishing technologies threaten their ecosystems human communities that depend them. Among species, Alaska's charismatic megafaunal invertebrate, red king crab, faces all three declined substantially in many parts its distribution. Managers have identified stock structure local adaptation as crucial information to help understand declines how potentially reverse them, with regulation possible enhancement. We generated low‐coverage whole genome sequencing (lcWGS) data crabs five regions: The Aleutian Islands, eastern Bering Sea, northern Gulf Alaska, Southeast Alaska. used millions genetic markers lcWGS build previous studies population Alaska < 100 investigate adaptation. found each regions formed own distinct clusters, some containing subpopulation structure. Most notably, we Sea were significantly differentiated, something had not been previously documented. Inbreeding region was low a concern management. patterns consistent several chromosomes one particularly strong signal chromosome 100. At this locus, harbors variation could facilitate environment. Our findings support current practice managing crab at regional scale, they strongly favor sourcing broodstock target if enhancement is considered avoid mismatch.

Language: Английский

Citations

0