Anthropogenic river fragmentation reduces long-term viability of the migratory fish Salminus brasiliensis (Characiformes: Bryconidae) populations
Abstract Life-history, geographical barriers, and damming can shape the genetic diversity of freshwater migratory fish, which are particularly vulnerable to anthropogenic impacts. We investigated the genetic diversity of Salminus brasiliensis, a long-distance migratory species that is recognized as...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Ictiologia
2021-07-01
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| Series: | Neotropical Ichthyology |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000200213&tlng=en |
| _version_ | 1798015400003239936 |
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| author | Josiane Ribolli Evoy Zaniboni-Filho Carolina Barros Machado Tailise Carolina de Souza Guerreiro Patrícia Domingues de Freitas Pedro Manoel Galetti Jr |
| author_facet | Josiane Ribolli Evoy Zaniboni-Filho Carolina Barros Machado Tailise Carolina de Souza Guerreiro Patrícia Domingues de Freitas Pedro Manoel Galetti Jr |
| author_sort | Josiane Ribolli |
| collection | DOAJ |
| description | Abstract Life-history, geographical barriers, and damming can shape the genetic diversity of freshwater migratory fish, which are particularly vulnerable to anthropogenic impacts. We investigated the genetic diversity of Salminus brasiliensis, a long-distance migratory species that is recognized as an important provider of ecosystem services. We implemented microsatellite analyses to assess genetic diversity and simulate future scenarios for evaluating the long-term viability of dammed and non-dammed populations from the Uruguay River. High levels of genetic diversity were detected for all sampled populations. However, effective population sizes were lower in the uppermost river stretches, where the landscape is highly fragmented. Population structure analysis indicated two spatial genetic populations. It is suggested that this genetic structure preserves populations partially isolated by an ancient natural barrier, instead of being a result of the presence of dams. The simulated genetic scenarios indicated that genetic variability of S. brasiliensis populations from upstream dams could collapse over the years, mainly due to the reduction in the number of alleles. Therefore, besides helping to better understand issues related to the influence of dams on the genetic diversity of migratory fish, our results are especially relevant for driving local fishery policies and management actions for the species conservation. |
| first_indexed | 2024-04-11T15:32:48Z |
| format | Article |
| id | doaj.art-d2729df90ed748ae947901ae6c658f65 |
| institution | Directory Open Access Journal |
| issn | 1982-0224 |
| language | English |
| last_indexed | 2024-04-11T15:32:48Z |
| publishDate | 2021-07-01 |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj.art-d2729df90ed748ae947901ae6c658f652022-12-22T04:16:05ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-02242021-07-0119210.1590/1982-0224-2020-0123Anthropogenic river fragmentation reduces long-term viability of the migratory fish Salminus brasiliensis (Characiformes: Bryconidae) populationsJosiane Ribollihttps://orcid.org/0000-0002-5553-9973Evoy Zaniboni-Filhohttps://orcid.org/0000-0001-6457-2655Carolina Barros Machadohttps://orcid.org/0000-0001-5195-5577Tailise Carolina de Souza Guerreirohttps://orcid.org/0000-0002-7223-1284Patrícia Domingues de Freitashttps://orcid.org/0000-0002-0309-2815Pedro Manoel Galetti Jrhttps://orcid.org/0000-0001-5916-6126Abstract Life-history, geographical barriers, and damming can shape the genetic diversity of freshwater migratory fish, which are particularly vulnerable to anthropogenic impacts. We investigated the genetic diversity of Salminus brasiliensis, a long-distance migratory species that is recognized as an important provider of ecosystem services. We implemented microsatellite analyses to assess genetic diversity and simulate future scenarios for evaluating the long-term viability of dammed and non-dammed populations from the Uruguay River. High levels of genetic diversity were detected for all sampled populations. However, effective population sizes were lower in the uppermost river stretches, where the landscape is highly fragmented. Population structure analysis indicated two spatial genetic populations. It is suggested that this genetic structure preserves populations partially isolated by an ancient natural barrier, instead of being a result of the presence of dams. The simulated genetic scenarios indicated that genetic variability of S. brasiliensis populations from upstream dams could collapse over the years, mainly due to the reduction in the number of alleles. Therefore, besides helping to better understand issues related to the influence of dams on the genetic diversity of migratory fish, our results are especially relevant for driving local fishery policies and management actions for the species conservation.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000200213&tlng=enCascade of reservoirsGenetic diversityGenetic population structuringNatural barrierRiver fragmentation |
| spellingShingle | Josiane Ribolli Evoy Zaniboni-Filho Carolina Barros Machado Tailise Carolina de Souza Guerreiro Patrícia Domingues de Freitas Pedro Manoel Galetti Jr Anthropogenic river fragmentation reduces long-term viability of the migratory fish Salminus brasiliensis (Characiformes: Bryconidae) populations Neotropical Ichthyology Cascade of reservoirs Genetic diversity Genetic population structuring Natural barrier River fragmentation |
| title | Anthropogenic river fragmentation reduces long-term viability of the migratory fish Salminus brasiliensis (Characiformes: Bryconidae) populations |
| title_full | Anthropogenic river fragmentation reduces long-term viability of the migratory fish Salminus brasiliensis (Characiformes: Bryconidae) populations |
| title_fullStr | Anthropogenic river fragmentation reduces long-term viability of the migratory fish Salminus brasiliensis (Characiformes: Bryconidae) populations |
| title_full_unstemmed | Anthropogenic river fragmentation reduces long-term viability of the migratory fish Salminus brasiliensis (Characiformes: Bryconidae) populations |
| title_short | Anthropogenic river fragmentation reduces long-term viability of the migratory fish Salminus brasiliensis (Characiformes: Bryconidae) populations |
| title_sort | anthropogenic river fragmentation reduces long term viability of the migratory fish salminus brasiliensis characiformes bryconidae populations |
| topic | Cascade of reservoirs Genetic diversity Genetic population structuring Natural barrier River fragmentation |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000200213&tlng=en |
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