Spatial and temporal variation of fish assemblage structure in a neotropical Mexican river
The introduction of non-native fish into the Teuchitlán River, in west-central Mexico, was suggested as a key factor behind the change in the fish assemblage, and even in the extinction of endemic species. The characterization of the fish assemblage and the relationship between fish abundance and t...
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| Format: | Article |
| Language: | English |
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Universidad Nacional Autónoma de México
2021-09-01
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| Series: | Revista Mexicana de Biodiversidad |
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| Online Access: | https://revista.ib.unam.mx/index.php/bio/article/view/3433 |
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| author | Valentin Mar-Silva Yvonne Herrerías-Diego Martina Medina-Nava Juan Pablo Ramírez-Herrejón Luis Mendoza-Cuenca Rubén Hernández-Morales Omar Domínguez-Domínguez |
| author_facet | Valentin Mar-Silva Yvonne Herrerías-Diego Martina Medina-Nava Juan Pablo Ramírez-Herrejón Luis Mendoza-Cuenca Rubén Hernández-Morales Omar Domínguez-Domínguez |
| author_sort | Valentin Mar-Silva |
| collection | DOAJ |
| description |
The introduction of non-native fish into the Teuchitlán River, in west-central Mexico, was suggested as a key factor behind the change in the fish assemblage, and even in the extinction of endemic species. The characterization of the fish assemblage and the relationship between fish abundance and the anthropogenic conditions were evaluated
over 2-year period. Fish assemblage structure, species replacement, and dominance were examined along a longitudinal environmental gradient. Physical and chemical parameters of the water were recorded. The relationship between fish abundance and abiotic factors was inferred from multivariate analysis. The results showed that the non-native poecilid Pseudoxiphophorus bimaculatus was dominant, and the abundance and biomass of non-native species exceeded 50%
in all sites and seasons. Species diversity and native fish abundance were greater in upstream sites, which presented higher dissolved oxygen and lower nitrates. The native ichthyofauna of the Teuchitlán River has been replaced by non-native species. This decline of the native fish species seems to be due not only to the interaction with non-native species but also to the multiple human impacts on the lotic system.
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| format | Article |
| id | doaj-art-db85af038950416b8ea59155e55d2bfc |
| institution | Kabale University |
| issn | 1870-3453 2007-8706 |
| language | English |
| publishDate | 2021-09-01 |
| publisher | Universidad Nacional Autónoma de México |
| record_format | Article |
| series | Revista Mexicana de Biodiversidad |
| spelling | doaj-art-db85af038950416b8ea59155e55d2bfc2025-08-20T03:49:23ZengUniversidad Nacional Autónoma de MéxicoRevista Mexicana de Biodiversidad1870-34532007-87062021-09-019210.22201/ib.20078706e.2021.92.3433Spatial and temporal variation of fish assemblage structure in a neotropical Mexican riverValentin Mar-Silva0Yvonne Herrerías-Diego1Martina Medina-Nava2Juan Pablo Ramírez-Herrejón3Luis Mendoza-Cuenca4Rubén Hernández-Morales5Omar Domínguez-Domínguez6Universidad Michoacana de San Nicolás de HidalgoUniversidad Michoacana de San Nicolás de HidalgoUniversidad Michoacana de San Nicolás de HidalgoUniversidad Autónoma de QuerétaroUniversidad Michoacana de San Nicolás de HidalgoUniversidad Michoacana de San Nicolás de HidalgoUniversidad Michoacana de San Nicolás de Hidalgo The introduction of non-native fish into the Teuchitlán River, in west-central Mexico, was suggested as a key factor behind the change in the fish assemblage, and even in the extinction of endemic species. The characterization of the fish assemblage and the relationship between fish abundance and the anthropogenic conditions were evaluated over 2-year period. Fish assemblage structure, species replacement, and dominance were examined along a longitudinal environmental gradient. Physical and chemical parameters of the water were recorded. The relationship between fish abundance and abiotic factors was inferred from multivariate analysis. The results showed that the non-native poecilid Pseudoxiphophorus bimaculatus was dominant, and the abundance and biomass of non-native species exceeded 50% in all sites and seasons. Species diversity and native fish abundance were greater in upstream sites, which presented higher dissolved oxygen and lower nitrates. The native ichthyofauna of the Teuchitlán River has been replaced by non-native species. This decline of the native fish species seems to be due not only to the interaction with non-native species but also to the multiple human impacts on the lotic system. https://revista.ib.unam.mx/index.php/bio/article/view/3433Biodiversity conservationBiotic homogenizationHuman impactNative ichthyofauna |
| spellingShingle | Valentin Mar-Silva Yvonne Herrerías-Diego Martina Medina-Nava Juan Pablo Ramírez-Herrejón Luis Mendoza-Cuenca Rubén Hernández-Morales Omar Domínguez-Domínguez Spatial and temporal variation of fish assemblage structure in a neotropical Mexican river Revista Mexicana de Biodiversidad Biodiversity conservation Biotic homogenization Human impact Native ichthyofauna |
| title | Spatial and temporal variation of fish assemblage structure in a neotropical Mexican river |
| title_full | Spatial and temporal variation of fish assemblage structure in a neotropical Mexican river |
| title_fullStr | Spatial and temporal variation of fish assemblage structure in a neotropical Mexican river |
| title_full_unstemmed | Spatial and temporal variation of fish assemblage structure in a neotropical Mexican river |
| title_short | Spatial and temporal variation of fish assemblage structure in a neotropical Mexican river |
| title_sort | spatial and temporal variation of fish assemblage structure in a neotropical mexican river |
| topic | Biodiversity conservation Biotic homogenization Human impact Native ichthyofauna |
| url | https://revista.ib.unam.mx/index.php/bio/article/view/3433 |
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