Application of the geometric morphometrics approach in the discrimination of morphological traits between brown trout lineages in the Danube Basin of Croatia
Brown trout is a salmonid fish with a natural range extending throughout western Eurasia and North Africa. Due to its commercial value, it has also been introduced worldwide. In continental Croatia, introduced trout of the Atlantic lineage hybridizes with native trout of the Danubian lineage, threat...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2021-01-01
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| Series: | Knowledge and Management of Aquatic Ecosystems |
| Subjects: | |
| Online Access: | https://www.kmae-journal.org/articles/kmae/full_html/2021/01/kmae210032/kmae210032.html |
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| author | Špelić Ivan Rezić Andrea Kanjuh Tamara Marić Ana Maguire Ivana Simonović Predrag Radočaj Tena Piria Marina |
| author_facet | Špelić Ivan Rezić Andrea Kanjuh Tamara Marić Ana Maguire Ivana Simonović Predrag Radočaj Tena Piria Marina |
| author_sort | Špelić Ivan |
| collection | DOAJ |
| description | Brown trout is a salmonid fish with a natural range extending throughout western Eurasia and North Africa. Due to its commercial value, it has also been introduced worldwide. In continental Croatia, introduced trout of the Atlantic lineage hybridizes with native trout of the Danubian lineage, threatening the native genetic diversity. The geometric morphometrics approach was used in this study to analyse changes in shape between native trout, introduced trout and their hybrids, classified a priori by molecular phylogenetic analyses. A total of 19 landmarks and semi-landmarks were used to capture the shape of 92 trout individuals belonging to two lineages and their hybrids. Canonical variate analysis and discriminant function analysis were used to analyse and describe shape variation. A significant difference was found between the shape of the Atlantic lineage trout and both Danubian lineage trout and hybrids, with the most prominent differences in body depth, head length and eye size. No statistically significant shape differences were observed between Danubian lineage trout and the hybrids. The observed significant differences in shape could be the result of genetic diversity or trout phenotypic plasticity. Further studies are needed to clarify the origin of this variation in shape. |
| first_indexed | 2024-12-16T23:30:14Z |
| format | Article |
| id | doaj.art-6ee189e62d8647c8bf1e910a71e593f4 |
| institution | Directory Open Access Journal |
| issn | 1961-9502 |
| language | English |
| last_indexed | 2024-12-16T23:30:14Z |
| publishDate | 2021-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Knowledge and Management of Aquatic Ecosystems |
| spelling | doaj.art-6ee189e62d8647c8bf1e910a71e593f42022-12-21T22:11:54ZengEDP SciencesKnowledge and Management of Aquatic Ecosystems1961-95022021-01-0104222210.1051/kmae/2021021kmae210032Application of the geometric morphometrics approach in the discrimination of morphological traits between brown trout lineages in the Danube Basin of CroatiaŠpelić Ivan0https://orcid.org/0000-0003-0205-1736Rezić Andrea1https://orcid.org/0000-0001-6643-7895Kanjuh Tamara2Marić Ana3Maguire Ivana4https://orcid.org/0000-0001-7456-8449Simonović Predraghttps://orcid.org/0000-0002-4819-4962Radočaj Tena5Piria Marina6https://orcid.org/0000-0001-6324-9282University of Zagreb Faculty of Agriculture, Svetošimunska cesta 25University of Zagreb Faculty of Agriculture, Svetošimunska cesta 25Faculty of Biology, University of Belgrade, Studentski trg 16Faculty of Biology, University of Belgrade, Studentski trg 16University of Zagreb, Faculty of Science, Department of Biology, Rooseveltov trg 6University of Zagreb Faculty of Agriculture, Svetošimunska cesta 25University of Zagreb Faculty of Agriculture, Svetošimunska cesta 25Brown trout is a salmonid fish with a natural range extending throughout western Eurasia and North Africa. Due to its commercial value, it has also been introduced worldwide. In continental Croatia, introduced trout of the Atlantic lineage hybridizes with native trout of the Danubian lineage, threatening the native genetic diversity. The geometric morphometrics approach was used in this study to analyse changes in shape between native trout, introduced trout and their hybrids, classified a priori by molecular phylogenetic analyses. A total of 19 landmarks and semi-landmarks were used to capture the shape of 92 trout individuals belonging to two lineages and their hybrids. Canonical variate analysis and discriminant function analysis were used to analyse and describe shape variation. A significant difference was found between the shape of the Atlantic lineage trout and both Danubian lineage trout and hybrids, with the most prominent differences in body depth, head length and eye size. No statistically significant shape differences were observed between Danubian lineage trout and the hybrids. The observed significant differences in shape could be the result of genetic diversity or trout phenotypic plasticity. Further studies are needed to clarify the origin of this variation in shape.https://www.kmae-journal.org/articles/kmae/full_html/2021/01/kmae210032/kmae210032.htmlsalmonid fishintroductionshape analysisblack sea basinhybridization |
| spellingShingle | Špelić Ivan Rezić Andrea Kanjuh Tamara Marić Ana Maguire Ivana Simonović Predrag Radočaj Tena Piria Marina Application of the geometric morphometrics approach in the discrimination of morphological traits between brown trout lineages in the Danube Basin of Croatia Knowledge and Management of Aquatic Ecosystems salmonid fish introduction shape analysis black sea basin hybridization |
| title | Application of the geometric morphometrics approach in the discrimination of morphological traits between brown trout lineages in the Danube Basin of Croatia |
| title_full | Application of the geometric morphometrics approach in the discrimination of morphological traits between brown trout lineages in the Danube Basin of Croatia |
| title_fullStr | Application of the geometric morphometrics approach in the discrimination of morphological traits between brown trout lineages in the Danube Basin of Croatia |
| title_full_unstemmed | Application of the geometric morphometrics approach in the discrimination of morphological traits between brown trout lineages in the Danube Basin of Croatia |
| title_short | Application of the geometric morphometrics approach in the discrimination of morphological traits between brown trout lineages in the Danube Basin of Croatia |
| title_sort | application of the geometric morphometrics approach in the discrimination of morphological traits between brown trout lineages in the danube basin of croatia |
| topic | salmonid fish introduction shape analysis black sea basin hybridization |
| url | https://www.kmae-journal.org/articles/kmae/full_html/2021/01/kmae210032/kmae210032.html |
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