Population genetic structure and demographic history reconstruction of introduced flathead catfish (Pylodictis olivaris) in two US Mid-Atlantic rivers.
| Title: | Population genetic structure and demographic history reconstruction of introduced flathead catfish (Pylodictis olivaris) in two US Mid-Atlantic rivers. |
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| Authors: | Waraniak JM; Pennsylvania Cooperative Fish and Wildlife Research Unit, Department of Ecosystem Science and Management, The Pennsylvania State University, University Park, Pennsylvania, USA.; Eackles MS; U.S. Geological Survey Eastern Ecological Science Center, Kearneysville, West Virginia, USA.; Keagy J; Department of Ecosystem Science and Management, The Pennsylvania State University, University Park, Pennsylvania, USA.; Smith GD; Pennsylvania Fish and Boat Commission, Bellefonte, Pennsylvania, USA.; Schall M; Pennsylvania State University, Biological Services, Hazleton, Pennsylvania, USA.; Stark S; Pennsylvania Cooperative Fish and Wildlife Research Unit, Department of Ecosystem Science and Management, The Pennsylvania State University, University Park, Pennsylvania, USA.; White SL; U.S. Geological Survey Eastern Ecological Science Center, Kearneysville, West Virginia, USA.; Kazyak DC; U.S. Geological Survey Eastern Ecological Science Center, Kearneysville, West Virginia, USA.; Wagner T; U.S. Geological Survey, Pennsylvania Cooperative Fish and Wildlife Research Unit, Pennsylvania State University, University Park, Pennsylvania, USA. |
| Source: | Journal of fish biology [J Fish Biol] 2024 Dec; Vol. 105 (6), pp. 1614-1627. Date of Electronic Publication: 2024 Aug 12. |
| Publication Type: | Journal Article |
| Language: | English |
| Journal Info: | Publisher: Blackwell Publishing Country of Publication: England NLM ID: 0214055 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-8649 (Electronic) Linking ISSN: 00221112 NLM ISO Abbreviation: J Fish Biol Subsets: MEDLINE |
| Imprint Name(s): | Publication: 2003- : Oxford, UK : Blackwell Publishing; Original Publication: London, New York, Published for the Fisheries Society of the British Isles by Academic Press. |
| MeSH Terms: | Catfishes*/genetics ; Rivers* ; Microsatellite Repeats* ; Genetic Variation* ; Introduced Species* ; Genetics, Population*; Animals |
| Abstract: | Population genetic analysis of invasive populations can provide valuable insights into the source of introductions, pathways for expansion, and their demographic histories. Flathead catfish (Pylodictis olivaris) are a prolific invasive species with high fecundity, long-distance dispersal, and piscivorous feeding habits that can lead to declines in native fish populations. In this study, we analyse the genetics of invasive P. olivaris in the Mid-Atlantic region to assess their connectivity and attempt to reconstruct the history of introduced populations. Based on an assessment across 13 microsatellite loci, P. olivaris from the Susquehanna River system (N = 537), Schuylkill River (N = 33), and Delaware River (N = 1) have low genetic diversity (global Hobs = 0.504), although we detected no evidence of substantial inbreeding (FIS = -0.083 to 0.022). P. olivaris from these different river systems were genetically distinct, suggesting separate introductions. However, population structure was much weaker within each river system and exhibited a pattern of high connectivity, with some evidence of isolation by distance. P. olivaris from the Susquehanna and Schuylkill rivers showed evidence for recent genetic bottlenecks, and demographic models were consistent with historical records, which suggest that populations were established by recent founder events consisting of a small number of individuals. Our results show the risk posed by small introductions of P. olivaris, which can spread widely once a population is established, and highlight the importance of prevention and sensitive early detection methods to prevent the spread of P. olivaris in the future.; (© 2024 The Author(s). Journal of Fish Biology published by John Wiley & Sons Ltd on behalf of Fisheries Society of the British Isles. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.) |
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| Grant Information: | U.S. Geological Survey; PEN04768 National Institute of Food and Agriculture |
| Contributed Indexing: | Keywords: Susquehanna River; approximate Bayesian computation; genetic bottlenecks; invasive species; microsatellites; riverscape genetics |
| Entry Date(s): | Date Created: 20240813 Date Completed: 20241217 Latest Revision: 20250104 |
| Update Code: | 20260130 |
| PubMed Central ID: | PMC11650961 |
| DOI: | 10.1111/jfb.15888 |
| PMID: | 39135361 |
| Database: | MEDLINE |
Journal Article