Conservation implications of revised genetic structure resulting from new population discovery: the threatened eastern sand darter (<i>Ammocrypta pellucida</i>) in Canada

Walter, Ryan P.; Venney, Clare J; Mandrak, Nicholas E.; Heath, Daniel D.

doi:10.1111/jfb.14922

Cited by 3 publications

(4 citation statements)

References 36 publications

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“…Similar patterns were identified in Eastern Sand Darter Ammocrypta pellucida, another endangered freshwater species in the provinces of Ontario and Quebec and the states of New York, Michigan, Pennsylvania, and Vermont, that colonized the Laurentian Great Lakes around the same time as Silver Chub (Mandrak and Crossman 1992). Walter and colleagues found that an Eastern Sand Darter population in West Lake (Ontario) was genetically divergent from those of other populations but similar to Wabash River populations (Walter et al 2022), suggesting a possible shared dispersal route with Silver Chub.…”

Section: Lake Erie Population Is Genetically Divergentmentioning

confidence: 63%

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Genetic structure of the Silver Chub indicates distinctiveness of Lake Erie population

Elbassiouny,

Fontenelle,

Kočovský

et al. 2023

N American J Fish Manag

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ObjectiveSilver Chub Macrhybopsis storeriana is a small riverine minnow endemic to North American fresh waters. Its range extends from the southern USA to southcentral Canada; the latter includes a rare lacustrine population in Lake Erie. Anthropogenic activities pose an immediate threat to several Silver Chub populations, currently categorized from special concern to threatened at the state level in the USA and federally and provincially not‐at‐risk to endangered in Canada. Several studies have examined the anthropogenic causes for the decline of Silver Chub populations, but conservation efforts have been hindered by the lack of knowledge of the population genetics of this species.MethodsHere, we provide an assessment of the genetic diversity of Silver Chub populations across the USA and Canada using a fast‐evolving mitochondrial gene, with particular focus on the Lake Erie population.ResultWe found the Lake Erie population to be divergent from all other populations, with nearly all the haplotypes sampled there being private.ConclusionOur study provides genetic evidence that the Silver Chub population in Lake Erie could be considered a separate conservation unit.

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Section: Lake Erie Population Is Genetically Divergentmentioning

confidence: 63%

“…Walter and colleagues found that an Eastern Sand Darter population in West Lake (Ontario) was genetically divergent from those of other populations but similar to Wabash River populations (Walter et al. 2022), suggesting a possible shared dispersal route with Silver Chub.…”

Section: Discussionmentioning

confidence: 98%

Genetic structure of the Silver Chub indicates distinctiveness of Lake Erie population

Elbassiouny,

Fontenelle,

Kočovský

et al. 2023

N American J Fish Manag

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“…Although Atlantic salmon represent an extraordinary example where extensive amounts of genetic and genomic data that can inform conservation units are available, we expect that such large datasets will become increasingly common over the next decade for many species, as genomic resources become more widely accessible (Blanchet et al, 2017 ; Leigh et al, 2021 ). Already genetic datasets have been used to inform genetic discreteness or isolation of conservation units in recent decades (COSEWIC, 2010b ; Mee et al, 2015 ; Walter et al, 2022 ). However, genomic datasets are only starting to be used to inform on the question of evolutionary significance (COSEWIC, 2010a ; Forester et al, 2022 ; Waples et al, 2022 ; Xuereb et al, 2022 ).…”

Section: Discussionmentioning

confidence: 99%

Multifaceted framework for defining conservation units: An example from Atlantic salmon (Salmo salar) in Canada

Lehnert,

Bradbury,

Wringe

et al. 2023

Evolutionary Applications

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Conservation units represent important components of intraspecific diversity that can aid in prioritizing and protecting at‐risk populations, while also safeguarding unique diversity that can contribute to species resilience. In Canada, identification and assessments of conservation units is done by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC). COSEWIC can recognize conservation units below the species level (termed “designatable units”; DUs) if the unit has attributes that make it both discrete and evolutionarily significant. There are various ways in which a DU can meet criteria of discreteness and significance, and increasing access to “big data” is providing unprecedented information that can directly inform both criteria. Specifically, the incorporation of genomic data for an increasing number of non‐model species is informing more COSEWIC assessments; thus, a repeatable, robust framework is needed for integrating these data into DU characterization. Here, we develop a framework that uses a multifaceted, weight of evidence approach to incorporate multiple data types, including genetic and genomic data, to inform COSEWIC DUs. We apply this framework to delineate DUs of Atlantic salmon (Salmo salar, L.), an economically, culturally, and ecologically significant species, that is also characterized by complex hierarchical population structure. Specifically, we focus on an in‐depth example of how our approach was applied to a previously data limited region of northern Canada that was defined by a single large DU. Application of our framework with newly available genetic and genomic data led to subdividing this DU into three new DUs. Although our approach was developed to meet criteria of COSEWIC, it is widely applicable given similarities in the definitions of a conservation unit.

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“…Microsatellites can be used to reveal inbreeding, hybridization, and genetic structure (Honka et al 2022). Furthermore, the microsatellite is often used in animal conservation to see the impact of conservation on genetic factors (Walter et al 2021). Furthermore, microsatellites are extremely useful with low-quality samples, become inexpensive, and take time to develop (Castoe et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Genetic Diversity of Eight Native Indonesian Chicken Breeds on Microsatellite Markers

2022

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Indonesia has diversity in native chickens based on phenotypes. This diversity is utilized for economic purposes such as meat, eggs, fancy, crowing, and fighting. This study aimed to determine the genetic structure of eight native Indonesian chicken breeds with microsatellite markers, the genetic distance, and inbreeding coefficient of each breed of chicken used for crossbreeding programs to obtain a positive heterosis effect for selection programs. The samples used were Arab, Merawang, Pelung, Sentul, Cemani, KUB, Black Kedu and White Kedu. Broiler chickens (Cobb) were used as the outgroup in this study. A total of 192 DNA samples from eight breeds were used in this study. A total of 24 microsatellite markers were used in this study to observe the genetic diversity of 8 native breeds. The POPGENE, Cervus, and FSTAT were used to generate the observed number of alleles, the effective number of alleles, observed heterozygosity value, expected heterozygosity value, the heterozygote deficit within the breed (FIS), gene flow (Nm), Hardy-Weinberg equilibrium, Polymorphism Information Content (PIC), and UPGMA tree. The principal component analysis (PCA) was performed using adegenet package of R software. Bayesian clustering assignments were analyzed using the STRUCTURE program. This study revealed a very close genetic relationship between seven native chickens and broilers. We also found Arab chickens separated from other Indonesian native chickens and no inbreeding in eight native Indonesian chicken breeds. In conclusion, we found two clusters among eight native Indonesian chicken breeds. Twenty microsatellite markers have a high PIC value in this study.

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Conservation implications of revised genetic structure resulting from new population discovery: the threatened eastern sand darter (Ammocrypta pellucida) in Canada

Cited by 3 publications

References 36 publications

Genetic structure of the Silver Chub indicates distinctiveness of Lake Erie population

Genetic structure of the Silver Chub indicates distinctiveness of Lake Erie population

Multifaceted framework for defining conservation units: An example from Atlantic salmon (Salmo salar) in Canada

Genetic Diversity of Eight Native Indonesian Chicken Breeds on Microsatellite Markers

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