Genetic Structure and Diversity of the Endemic Carolina Madtom and Conservation Implications

Cope, W. Gregory; Kwak, Thomas J.; Black, Tyler R.; Pacifici, Krishna; Harris, Sheila C.; Miller, Caitlin M.; Raley, Morgan E.; Hallerman, Eric M.

doi:10.1002/nafm.10589

Cited by 2 publications

(1 citation statement)

References 86 publications

(137 reference statements)

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“…The two primary drivers appear to be the breadth and diversity of the species themselves and the expanding or changing habitats with which they interact. There have been some advances in native catfish research, including work on habitat use of artificial structures (Cope et al 2019;Johnson et al 2021, this special issue), utilization of dead mussel shells for spawning (Brumley and Lienesch 2020), and genetic diversity (McCall and Fluker 2020;Cope et al 2021, this special issue) of madtoms; the growth of Brown Bullhead Ameiurus nebulosus (Hartman 2017) and Stonecats Noturus flavus (Puchala et al 2018); and distributions of rare species like the Yaqui Catfish Ictalurus pricei within their native ranges (Hafen et al 2021, this special issue).…”

Section: Ecology and Conservationmentioning

confidence: 99%

Catfish 2020, A Clear Vision of the Future

Porath

Kwak

Neely

et al. 2021

N American J Fish Manag

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The Third International Catfish Symposium was held in Little Rock, Arkansas, in 2020 and provided another milestone to gauge advances in knowledge related to conservation and management of these valuable fishes. Attendees from 29 states and 4 countries gathered to communicate research and information on the conservation, ecology, and management of the world’s catfishes. During 3 d of technical sessions and workshops, 74 oral presentations and 17 posters were shared with 198 attending fisheries professionals. Plenary and oral presentations were recorded and are available online (https://www.youtube.com/channel/UCHNt7ZV05DLWoe4qJO798Pw/videos), aligning with the symposium theme of “Communicating Catfish Science.” Technical sessions explored current research and management issues that included population demographics, introduced catfish populations, sampling methods, harvest management, human dimensions, conservation, habitat use and movement, biology, and aging methods. Ultimately, 38 manuscripts were peer reviewed and published as this special issue of the North American Journal of Fisheries Management. Interest in catfish science, as gauged by publications in six peer‐reviewed fisheries journals, has grown steadily since a 1910 catfish aquaculture article appeared in the Transactions of the American Fisheries Society. Biology and ecology topics became prominent in the 1970s and 1980s, while articles on techniques and fisheries management have grown steadily through 2020. Ecology, fisheries management, and techniques were the most published topics in the three international catfish symposia. Future research and management efforts will continue similar work but also seek to address the expanding role of catfish as invasive species and a better understanding of the ecology and conservation of small‐bodied native catfish. Among the greatest challenges will be adapting current tools and identifying future knowledge gaps as we experience a changing climate. This will require an enhanced understanding of transforming ecosystems and advanced adaptive management applications. The decadal occurrence of a dedicated symposium has served to summarize progress and focus future efforts to advance catfish science.

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Section: Ecology and Conservationmentioning

confidence: 99%

Catfish 2020, A Clear Vision of the Future

Porath

Kwak

Neely

et al. 2021

N American J Fish Manag

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Population structure and genetic diversity of the endangered fish black shinner Pseudopungtungia nigra (Cyprinidae) in Korea: a wild and restoration population

Kim

Kwak

Sung

et al. 2023

Sci Rep

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The black shinner Pseudopungtungia nigra Mori, 1935 is an endangered fish endemic to Korea. It lives in the narrow basin of the Geumgang River, Mangyeonggang River, and Ungcheoncheon Stream, which flow into the West Sea of Korea. One population of P. nigra in Ungcheoncheon Stream has been locally exterminated once; it is now inhabiting the upper reaches of the dam through a restoration program. Efforts to identify and understand the genetic structure of these populations are important for conservation planning. Here, we analyzed genetic diversity using 21 microsatellite markers for 9 populations. The mean number of alleles ranged from 4.4 to 8.1, mean allelic richness ranged from 4.6 to 7.8, mean observed heterozygosity ranged from 0.519 to 0.702, and mean expected heterozygosity ranged from 0.540 to 0.763. All groups had recent and historical bottlenecks (P < 0.05, M-ratio < 0.68). Three groups [YD (2019), OC and UC] had significant inbreeding index values, suggesting that they were engaged in inbreeding. We observed a moderate level of genetic differentiation between MG and the rest of the population (FST = 0.135 to 0.168, P < 0.05). The genetic structure exhibited a fitting constant K = 2, along with separation between MG and the remaining populations. With respect to genetic flow, YD (2019), OC, CG, and ND shifted to the UC population (0.263 to 0.278). The genetic flow of each population was transferred only within the population; there was no gene flow among populations, except for the Ungcheoncheon Stream population. This study shows that the Ungcheoncheon Stream population needs conservation efforts to increase its genetic diversity, and the Geumgang River populations needs a conservation plan that considers the possibility of conservation and evolution through gene exchange among the populations.

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Genetic Structure and Diversity of the Endemic Carolina Madtom and Conservation Implications

Cited by 2 publications

References 86 publications

Catfish 2020, A Clear Vision of the Future

Catfish 2020, A Clear Vision of the Future

Population structure and genetic diversity of the endangered fish black shinner Pseudopungtungia nigra (Cyprinidae) in Korea: a wild and restoration population

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