Loss of native brown trout diversity in streams of the continental Croatia
Introduction: The genetic diversity of brown trout in the Western Balkans has been disrupted by the introduction of non-native Atlantic phylogenetic lineages and non-native haplotypes of the Danubian phylogenetic lineage. The Western Balkans is characterized by the greatest phenotypic and genotypic...
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Frontiers Media S.A.
2024-03-01
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| Series: | Frontiers in Environmental Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenvs.2024.1379878/full |
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| author | Tamara Kanjuh Ana Marić Dubravka Škraba Jurlina Predrag Simonović Ivan Špelić Marina Piria Marina Piria Ivana Maguire |
| author_facet | Tamara Kanjuh Ana Marić Dubravka Škraba Jurlina Predrag Simonović Ivan Špelić Marina Piria Marina Piria Ivana Maguire |
| author_sort | Tamara Kanjuh |
| collection | DOAJ |
| description | Introduction: The genetic diversity of brown trout in the Western Balkans has been disrupted by the introduction of non-native Atlantic phylogenetic lineages and non-native haplotypes of the Danubian phylogenetic lineage. The Western Balkans is characterized by the greatest phenotypic and genotypic diversity of trout populations, and a large part of the internal territory belongs to the Black Sea basin, where the Danubian Da1 haplotype is native. Artificial propagation of non-native lineages in the Western Balkans has a long history, and these populations are often the only available material for stocking rivers attractive for fishing.Material and Methods: Fifteen populations in the Danube basin of the continental Croatia were analysed. The analysis of eight microsatellite loci was performed to determine the structure of brown trout populations, as well as the degree of introgression of non-native genetic material into the native.Results and Disscusion: The results of this study showed significant genetic similarity among brown trout populations, confirming a long history of introduction with non-native genetic material. The main reason was uncontrolled stocking with inadequate material, which is available in fish farms and consists mainly of brown trout of the Atlantic phylogenetic lineage. The results of this study also indicated stocking with brown trout of the non-native haplotypes of the Danubian phylogenetic lineage. The potential breeding origin of brown trout carrying the Danubian Da2 mtDNA haplotype and ways of its introduction into rivers have yet to be investigated. For the survival of the unique gene pool of brown trout in Croatian rivers, it is of fundamental importance to know the structure of wild and farmed populations with the aim of proposing and implementing conservation measures. |
| first_indexed | 2024-04-24T19:18:05Z |
| format | Article |
| id | doaj.art-fe9b440c4ddf48cb85d647c68723c477 |
| institution | Directory Open Access Journal |
| issn | 2296-665X |
| language | English |
| last_indexed | 2024-04-24T19:18:05Z |
| publishDate | 2024-03-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Environmental Science |
| spelling | doaj.art-fe9b440c4ddf48cb85d647c68723c4772024-03-26T04:37:40ZengFrontiers Media S.A.Frontiers in Environmental Science2296-665X2024-03-011210.3389/fenvs.2024.13798781379878Loss of native brown trout diversity in streams of the continental CroatiaTamara Kanjuh0Ana Marić1Dubravka Škraba Jurlina2Predrag Simonović3Ivan Špelić4Marina Piria5Marina Piria6Ivana Maguire7University of Belgrade, Faculty of Biology, Department of Morphology, Systematics and Phylogeny of Animals, Belgrade, SerbiaUniversity of Belgrade, Faculty of Biology, Department of Morphology, Systematics and Phylogeny of Animals, Belgrade, SerbiaUniversity of Belgrade, Faculty of Biology, Department of Morphology, Systematics and Phylogeny of Animals, Belgrade, SerbiaUniversity of Belgrade, Faculty of Biology, Department of Morphology, Systematics and Phylogeny of Animals, Belgrade, SerbiaUniversity of Zagreb, Faculty of Agriculture, Department of Fisheries, Apiculture, Wildlife Management and Special Zoology, Zagreb, CroatiaUniversity of Zagreb, Faculty of Agriculture, Department of Fisheries, Apiculture, Wildlife Management and Special Zoology, Zagreb, CroatiaDepartment of Ecology and Vertebrate Zoology, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, PolandUniversity of Zagreb, Faculty of Science, Department of Biology, Zagreb, CroatiaIntroduction: The genetic diversity of brown trout in the Western Balkans has been disrupted by the introduction of non-native Atlantic phylogenetic lineages and non-native haplotypes of the Danubian phylogenetic lineage. The Western Balkans is characterized by the greatest phenotypic and genotypic diversity of trout populations, and a large part of the internal territory belongs to the Black Sea basin, where the Danubian Da1 haplotype is native. Artificial propagation of non-native lineages in the Western Balkans has a long history, and these populations are often the only available material for stocking rivers attractive for fishing.Material and Methods: Fifteen populations in the Danube basin of the continental Croatia were analysed. The analysis of eight microsatellite loci was performed to determine the structure of brown trout populations, as well as the degree of introgression of non-native genetic material into the native.Results and Disscusion: The results of this study showed significant genetic similarity among brown trout populations, confirming a long history of introduction with non-native genetic material. The main reason was uncontrolled stocking with inadequate material, which is available in fish farms and consists mainly of brown trout of the Atlantic phylogenetic lineage. The results of this study also indicated stocking with brown trout of the non-native haplotypes of the Danubian phylogenetic lineage. The potential breeding origin of brown trout carrying the Danubian Da2 mtDNA haplotype and ways of its introduction into rivers have yet to be investigated. For the survival of the unique gene pool of brown trout in Croatian rivers, it is of fundamental importance to know the structure of wild and farmed populations with the aim of proposing and implementing conservation measures.https://www.frontiersin.org/articles/10.3389/fenvs.2024.1379878/fullbrown troutmicrosatellitesCroatiastockingconservation |
| spellingShingle | Tamara Kanjuh Ana Marić Dubravka Škraba Jurlina Predrag Simonović Ivan Špelić Marina Piria Marina Piria Ivana Maguire Loss of native brown trout diversity in streams of the continental Croatia Frontiers in Environmental Science brown trout microsatellites Croatia stocking conservation |
| title | Loss of native brown trout diversity in streams of the continental Croatia |
| title_full | Loss of native brown trout diversity in streams of the continental Croatia |
| title_fullStr | Loss of native brown trout diversity in streams of the continental Croatia |
| title_full_unstemmed | Loss of native brown trout diversity in streams of the continental Croatia |
| title_short | Loss of native brown trout diversity in streams of the continental Croatia |
| title_sort | loss of native brown trout diversity in streams of the continental croatia |
| topic | brown trout microsatellites Croatia stocking conservation |
| url | https://www.frontiersin.org/articles/10.3389/fenvs.2024.1379878/full |
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