Fish conservation in the land of steppe and sky: Evolutionarily significant units of threatened salmonid species in Mongolia mirror major riverbasins
Mongolia's salmonids are suffering extensive population declines; thus, more comprehensive fisheries management and conservation strategies are required. To assist with their development, a better understanding of the genetic structure and diversity of these threatened species would allow a mor...
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ftufz:oai:ufz.de:21611 2023-12-10T09:49:23+01:00 Fish conservation in the land of steppe and sky: Evolutionarily significant units of threatened salmonid species in Mongolia mirror major riverbasins Kaus, Andrew Michalski, Stefan Hänfling, B. Karthe, Daniel Borchardt, Dietrich Durka, Walter 2019-02-27 application/pdf https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=21611 https://doi.org/10.1002/ece3.4974 en eng Wiley-Blackwell Ecology and Evolution 9 (6);; 3416 - 3433 https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=21611 https://dx.doi.org/10.1002/ece3.4974 info:eu-repo/semantics/openAccess ISSN: 2045-7758 Brachymystax lenok evolutionarily significant units freshwater fish conservation Hucho taimen threatened salmonids Thymallus baicalensis info:eu-repo/semantics/article https://purl.org/dc/dcmitype/Text 2019 ftufz https://doi.org/10.1002/ece3.4974 2023-11-12T23:35:28Z Mongolia's salmonids are suffering extensive population declines; thus, more comprehensive fisheries management and conservation strategies are required. To assist with their development, a better understanding of the genetic structure and diversity of these threatened species would allow a more targeted approach for preserving genetic variation and ultimately improve long‐term species recoveries. It is hypothesized that the unfragmented river basins that have persisted across Mongolia provide unobstructed connectivity for resident salmonid species. Thus, genetic structure is expected to be primarily segregated between major river basins. We tested this hypothesis by investigating the population structure for three salmonid genera (Hucho, Brachymystax and Thymallus) using different genetic markers to identify evolutionarily significant units (ESUs) and priority rivers to focus conservation efforts. Fish were assigned to separate ESUs when the combined evidence of mitochondrial and nuclear data indicated genetic isolation. Hucho taimen exhibited a dichotomous population structure forming two ESUs, with five priority rivers. Within the Brachymystax genus, there were three B. lenokESUs and one B. tumensisESU, along with six priority rivers. While B. tumensiswas confirmed to display divergent mtDNA haplotypes, haplotype sharing between these two congeneric species was also identified. For T. baicalensis,only a single ESU was assigned, with five priority rivers identified plus Lake Hovsgol. Additionally, we confirmed that T. nigrescens from Lake Hovsgol is a synonym of T. baicalensis. Across all species, the most prominent pattern was strong differentiation among major river basins with low differentiation and weak patterns of isolation by distance within river basins, which corroborated our hypothesis of high within‐basin connectivity across Mongolia. This new genetic information provides authorities the opportunity to distribute resources for management between ESUs while assigning additional protection for the ... Article in Journal/Newspaper Hucho taimen UFZ - Publication Index (Helmholtz-Centre for Environmental Research) Ecology and Evolution 9 6 3416 3433 |
institution |
Open Polar |
collection |
UFZ - Publication Index (Helmholtz-Centre for Environmental Research) |
op_collection_id |
ftufz |
language |
English |
topic |
Brachymystax lenok evolutionarily significant units freshwater fish conservation Hucho taimen threatened salmonids Thymallus baicalensis |
spellingShingle |
Brachymystax lenok evolutionarily significant units freshwater fish conservation Hucho taimen threatened salmonids Thymallus baicalensis Kaus, Andrew Michalski, Stefan Hänfling, B. Karthe, Daniel Borchardt, Dietrich Durka, Walter Fish conservation in the land of steppe and sky: Evolutionarily significant units of threatened salmonid species in Mongolia mirror major riverbasins |
topic_facet |
Brachymystax lenok evolutionarily significant units freshwater fish conservation Hucho taimen threatened salmonids Thymallus baicalensis |
description |
Mongolia's salmonids are suffering extensive population declines; thus, more comprehensive fisheries management and conservation strategies are required. To assist with their development, a better understanding of the genetic structure and diversity of these threatened species would allow a more targeted approach for preserving genetic variation and ultimately improve long‐term species recoveries. It is hypothesized that the unfragmented river basins that have persisted across Mongolia provide unobstructed connectivity for resident salmonid species. Thus, genetic structure is expected to be primarily segregated between major river basins. We tested this hypothesis by investigating the population structure for three salmonid genera (Hucho, Brachymystax and Thymallus) using different genetic markers to identify evolutionarily significant units (ESUs) and priority rivers to focus conservation efforts. Fish were assigned to separate ESUs when the combined evidence of mitochondrial and nuclear data indicated genetic isolation. Hucho taimen exhibited a dichotomous population structure forming two ESUs, with five priority rivers. Within the Brachymystax genus, there were three B. lenokESUs and one B. tumensisESU, along with six priority rivers. While B. tumensiswas confirmed to display divergent mtDNA haplotypes, haplotype sharing between these two congeneric species was also identified. For T. baicalensis,only a single ESU was assigned, with five priority rivers identified plus Lake Hovsgol. Additionally, we confirmed that T. nigrescens from Lake Hovsgol is a synonym of T. baicalensis. Across all species, the most prominent pattern was strong differentiation among major river basins with low differentiation and weak patterns of isolation by distance within river basins, which corroborated our hypothesis of high within‐basin connectivity across Mongolia. This new genetic information provides authorities the opportunity to distribute resources for management between ESUs while assigning additional protection for the ... |
format |
Article in Journal/Newspaper |
author |
Kaus, Andrew Michalski, Stefan Hänfling, B. Karthe, Daniel Borchardt, Dietrich Durka, Walter |
author_facet |
Kaus, Andrew Michalski, Stefan Hänfling, B. Karthe, Daniel Borchardt, Dietrich Durka, Walter |
author_sort |
Kaus, Andrew |
title |
Fish conservation in the land of steppe and sky: Evolutionarily significant units of threatened salmonid species in Mongolia mirror major riverbasins |
title_short |
Fish conservation in the land of steppe and sky: Evolutionarily significant units of threatened salmonid species in Mongolia mirror major riverbasins |
title_full |
Fish conservation in the land of steppe and sky: Evolutionarily significant units of threatened salmonid species in Mongolia mirror major riverbasins |
title_fullStr |
Fish conservation in the land of steppe and sky: Evolutionarily significant units of threatened salmonid species in Mongolia mirror major riverbasins |
title_full_unstemmed |
Fish conservation in the land of steppe and sky: Evolutionarily significant units of threatened salmonid species in Mongolia mirror major riverbasins |
title_sort |
fish conservation in the land of steppe and sky: evolutionarily significant units of threatened salmonid species in mongolia mirror major riverbasins |
publisher |
Wiley-Blackwell |
publishDate |
2019 |
url |
https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=21611 https://doi.org/10.1002/ece3.4974 |
genre |
Hucho taimen |
genre_facet |
Hucho taimen |
op_source |
ISSN: 2045-7758 |
op_relation |
https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=21611 https://dx.doi.org/10.1002/ece3.4974 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/ece3.4974 |
container_title |
Ecology and Evolution |
container_volume |
9 |
container_issue |
6 |
container_start_page |
3416 |
op_container_end_page |
3433 |
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1784893799832485888 |