Human Impacts on Great Lakes Walleye Sander vitreus Structure, Diversity and Local Adaptation DOI Creative Commons
Peter T. Euclide, Heiner Kuhl, Chris C. Wilson

et al.

Molecular Ecology, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 2, 2024

ABSTRACT Artificial propagation and wild release may influence the genetic integrity of populations. This practice has been prevalent in fisheries for centuries is often termed ‘stocking’. In Laurentian Great Lakes (Great here‐on), walleye populations faced declines from 1950s to 1970s, prompting extensive stocking efforts restoration. By mid‐2010s, showed signs recovery, but legacy on population structure at genomic level remains unclear. Using a dataset 45,600 genome‐aligned SNP loci genotyped 1075 individuals, we investigated impacts over 50 years across Lakes. Population was associated with both natural geographic barriers non‐native sources. Admixture between Lake Erie re‐populated Tittabawassee River indicate that have re‐distributed putatively adaptive alleles around Genome scans identified F ST outliers evidence selective sweeps, indicating local adaptation spawning likely. Notably, one region strong differentiation Muskegon River, which by strain walleye, suggesting admixture selection impact observed diversity. Overall, our study underscores how artificial translocations can significantly alter evolutionary trajectory The findings highlight complex interplay practices diversity, emphasising need careful management strategies preserve amidst conservation efforts.

Language: Английский

Salmon hatchery strays can demographically boost wild populations at the cost of diversity: quantitative genetic modelling of Alaska pink salmon DOI Creative Commons
Samuel A. May, Kyle R. Shedd, Kristen M. Gruenthal

et al.

Royal Society Open Science, Journal Year: 2024, Volume and Issue: 11(7)

Published: July 1, 2024

Hatcheries are vital to many salmon fisheries, with inherent risks and rewards. While hatcheries can increase the returns of adult fish, demographic evolutionary consequences for natural populations interacting hatchery fish on spawning grounds remain unclear. This study examined impacts stray hatchery-origin pink population productivity resilience. We explored temporal assortative mating dynamics using a quantitative genetic model that assumed only difference between hatchery- natural-origin adults was their return timing grounds. parameterized empirical data from an intensive multi-generational hatchery-wild interactions in world's largest fisheries enhancement program located Prince William Sound, Alaska. Across scenarios increasing presence grounds, our findings underscore trade-off preservation diversity. bolstered sizes towards local carrying capacities, introgression reduced variation by up 20%. Results indicated alleles rapidly assimilate into populations, despite fitness attributable phenotypic mismatches. These elucidate potential long-term arising specific interactions, emphasizing need management strategies balance conservation

Language: Английский

Citations

7
Phenotypic Sorting of Pink Salmon Hatchery Strays May Alleviate Adverse Impacts of Reduced Variation in Fitness‐Associated Traits DOI Creative Commons

Julia McMahon,

Samuel A. May, Peter S. Rand

et al.

Ecology and Evolution, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 1, 2025

ABSTRACT Maladapted immigrants may reduce wild population productivity and resilience, depending on the degree of fitness mismatch between dispersers locals. Thus, domesticated individuals escaping into populations is a key conservation concern. In Prince William Sound, Alaska, over 700 million pink salmon ( Oncorhynchus gorbuscha ) are released annually from hatcheries, providing natural experiment to characterize mechanisms underlying impacts populations. Using dataset > 200,000 sampled 30 8 years, we detected significant body size phenological differences hatchery‐ wild‐origin spawners, likely driven by competitive during maturation broodstock selection practices. Variation in traits was reduced hatchery fish, raising biodiversity concerns. However, phenotypic locals were positively correlated. We discuss possible that explain this pattern how it adverse associated with trait variation. This study suggests domestication widespread, but local adaptation be maintained sorting.

Language: Английский

Citations

0
Otolith and Genomic Data Reveal Temporal Insights Into Stocking Across a Large River Basin in a Mobile, Long‐Lived Australian Freshwater Fish Species DOI Creative Commons
Katherine A. Harrisson, Luciano B. Beheregaray, Christopher M. Bice

et al.

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

Published: March 5, 2025

Freshwater ecosystems and their biota are under increasing pressure from anthropogenic stressors. In response to declining fish stocks, hatchery stocking programmes widely implemented as core components of restoration management strategies, with positive outcomes for some wild populations. Despite this, remains contentious due potential genetic ecological risks Monitoring evaluation critical ensuring the long-term sustainability populations, but identification stocked individuals post-release a key challenge, particularly mobile species. this study, we combined otolith (natal origin age) genomic data identify evaluate implications culturally socioeconomically important freshwater fish, golden perch Macquaria ambigua (family: Percichthyidae), across Australia's Murray-Darling Basin (MDB). We also generated chromosome-level genome assembly. Many close kin were detected MDB, in prevalence over recent decades mostly origin. Rivers many associated low effective population sizes (Ne < 100). Genetic signatures varied according local context, being most pronounced not restricted rivers considered functionally isolated purposes. Where into that part connected metapopulation, there is scope modify current practices avoid over-representation related individuals. Increased focus on diversity likely promote persistence wild.

Language: Английский

Citations

0
Inter-annual dispersal stability within the Atlantic salmon metapopulation from the Bay of Biscay DOI Creative Commons
Anthony Fontaine, M.R. Vignon,

H. Tabouret

et al.

Fisheries Research, Journal Year: 2025, Volume and Issue: 284, P. 107323 - 107323

Published: March 9, 2025

Language: Английский

Citations

0
Genetic assessment of farmed Oreochromis mossambicus populations in South Africa DOI Creative Commons
Mahlatse Fortunate Mashaphu, Gordon C. O’Brien, Colleen T. Downs

et al.

PeerJ, Journal Year: 2025, Volume and Issue: 13, P. e18877 - e18877

Published: April 14, 2025

The global utilisation of Oreochromis spp. in freshwater aquaculture extends to South Africa. Here the native Mozambique tilapia ( mossambicus ) has been proposed as a priority species for regional projects, although it is still not preferred over non-native O. niloticus . There limited understanding genetic diversity, and differentiation farmed Using suite 14 microsatellite markers, present study aimed determine origin diversity four populations KwaZulu-Natal Mpumalanga provinces. Wild from rivers surrounding farms were included trace populations. Results revealed lower compared wild In particular, University Zululand population exhibited rest While most closely resembled their local counterparts, uMphafa ponds distinct characteristics. Notably, some individuals shared affinities with those Thukela River, suggesting that River could be source this population, or fish may have introduced escaped into river. suggests select potential use breeding broodstock supplementation programs but emphasizes importance thorough monitoring. However, before these can considered supplementation, further investigation required confirm integrity rule out contamination invasive species.

Language: Английский

Citations

0
Strategies for integrating animal social learning and culture into conservation translocation practice DOI Creative Commons
Alison L. Greggor,

Shermin de Silva,

Culum Brown

et al.

Philosophical Transactions of the Royal Society B Biological Sciences, Journal Year: 2025, Volume and Issue: 380(1925)

Published: May 1, 2025

Conservation translocations are increasingly used in species' recovery. Their success often depends upon maintaining or restoring survival-relevant behaviour, which is socially learned many animals. A lack of species- population-appropriate learning can lead to the loss adaptive increasing likelihood negative human interactions and compromising animals' ability migrate, exploit resources, avoid predators, integrate into wild populations, reproduce survive. When applied well, behavioural tools address deficiencies behaviours boost survival. However, their use has been uneven between species translocation programmes, behaviour commonly contributes failure. Critically, current international guidance (e.g. International Union for Nature's guidelines) does not directly discuss social its facilitation. We argue that linking knowledge about appropriate strategies will enhance direct future research. offer a framework incorporating animal planning, implementation, monitoring evaluation across captive settings. Our recommendations consider barriers practitioners face contending with logistics, time constraints intervention cost. emphasize stronger links researchers, wildlife agencies would increase support research, improve perceived relevance feasibility facilitating learning.This article part theme issue 'Animal culture: conservation changing world'.

Language: Английский

Citations

0
‘Ocean ranching’ has led to a pink-salmon boom — but there might be a catch DOI

Alix Soliman

Nature, Journal Year: 2024, Volume and Issue: 632(8024), P. 239 - 240

Published: July 31, 2024

Language: Английский

Citations

0
Human Impacts on Great Lakes Walleye Sander vitreus Structure, Diversity and Local Adaptation DOI Creative Commons
Peter T. Euclide, Heiner Kuhl, Chris C. Wilson

et al.

Molecular Ecology, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 2, 2024

ABSTRACT Artificial propagation and wild release may influence the genetic integrity of populations. This practice has been prevalent in fisheries for centuries is often termed ‘stocking’. In Laurentian Great Lakes (Great here‐on), walleye populations faced declines from 1950s to 1970s, prompting extensive stocking efforts restoration. By mid‐2010s, showed signs recovery, but legacy on population structure at genomic level remains unclear. Using a dataset 45,600 genome‐aligned SNP loci genotyped 1075 individuals, we investigated impacts over 50 years across Lakes. Population was associated with both natural geographic barriers non‐native sources. Admixture between Lake Erie re‐populated Tittabawassee River indicate that have re‐distributed putatively adaptive alleles around Genome scans identified F ST outliers evidence selective sweeps, indicating local adaptation spawning likely. Notably, one region strong differentiation Muskegon River, which by strain walleye, suggesting admixture selection impact observed diversity. Overall, our study underscores how artificial translocations can significantly alter evolutionary trajectory The findings highlight complex interplay practices diversity, emphasising need careful management strategies preserve amidst conservation efforts.

Language: Английский

Citations

0