Checklist comparison and dominance patterns of the fish fauna at Taim Wetland, South Brazil
Taim Hydrological System is a unique subtropical wetland in southern Brazil harboring an exceptional biological diversity. In 1978, an ecological reserve was established to protect part of this area from increasing anthropogenic impacts in its surroundings. Fishes have been poorly investigated in th...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Ictiologia
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| Series: | Neotropical Ichthyology |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000200012&lng=en&tlng=en |
| _version_ | 1818195341167558656 |
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| author | Alexandre M. Garcia Marlise A. Bemvenuti João P. Vieira David M. L. Motta Marques Marcelo D. M. Burns Alex Moresco Mario Vinicius L. Condini |
| author_facet | Alexandre M. Garcia Marlise A. Bemvenuti João P. Vieira David M. L. Motta Marques Marcelo D. M. Burns Alex Moresco Mario Vinicius L. Condini |
| author_sort | Alexandre M. Garcia |
| collection | DOAJ |
| description | Taim Hydrological System is a unique subtropical wetland in southern Brazil harboring an exceptional biological diversity. In 1978, an ecological reserve was established to protect part of this area from increasing anthropogenic impacts in its surroundings. Fishes have been poorly investigated in this system. Based on a multi-gear sampling study encompassing several years (2001-2005), and on comparisons with previous fish inventories, we provide an up-to-date species list of fishes occurring in the Taim Wetland. In addition, we made the first preliminary description of fish dominance patterns found in the main lakes of the system (Flores, Nicola, Jacaré and Mangueira). Checklist comparison resulted in 62 fish species distributed in 24 families, with Characidae (19 species) and Cichlidae (7) showing the highest species richness. Six species are cited for the first time in the reserve: Trachelyopterus lucenai (Auchenipteridae), Hoplosternum littorale (Callichthyidae), Rineloricaria cadeae (Loricariidae), Eigenmannia trilineata (Sternopygidae), Odontesthes mirinensis and O. perugiae (Atherinopsidae). Apparently, the black catfish T. lucenai invaded the system in the last decade and became one of the dominant species in the pelagic waters. Although differences in gears hindered direct comparisons, differences in species composition and dominance patterns between shallow margins and pelagic waters of lakes seem to occur in the lakes. A more diverse assemblage dominated by small fishes (< 5cm) occurred in the protected, vegetated lakes margins. In contrast, an assemblage with lower species richness comprised of larger fishes (> 15 cm) seemed to dominate in pelagic waters. |
| first_indexed | 2024-12-12T01:16:39Z |
| format | Article |
| id | doaj.art-8ebb2e6053894542a41e6ead80742648 |
| institution | Directory Open Access Journal |
| issn | 1982-0224 |
| language | English |
| last_indexed | 2024-12-12T01:16:39Z |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj.art-8ebb2e6053894542a41e6ead807426482022-12-22T00:43:19ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-02244226126810.1590/S1679-62252006000200012S1679-62252006000200012Checklist comparison and dominance patterns of the fish fauna at Taim Wetland, South BrazilAlexandre M. Garcia0Marlise A. Bemvenuti1João P. Vieira2David M. L. Motta Marques3Marcelo D. M. Burns4Alex Moresco5Mario Vinicius L. Condini6Universidade Federal do Rio Grande do SulFundação Universidade Federal de Rio GrandeFundação Universidade Federal de Rio GrandeUniversidade Federal do Rio Grande do SulFundação Universidade Federal de Rio GrandeFundação Universidade Federal de Rio GrandeFundação Universidade Federal de Rio GrandeTaim Hydrological System is a unique subtropical wetland in southern Brazil harboring an exceptional biological diversity. In 1978, an ecological reserve was established to protect part of this area from increasing anthropogenic impacts in its surroundings. Fishes have been poorly investigated in this system. Based on a multi-gear sampling study encompassing several years (2001-2005), and on comparisons with previous fish inventories, we provide an up-to-date species list of fishes occurring in the Taim Wetland. In addition, we made the first preliminary description of fish dominance patterns found in the main lakes of the system (Flores, Nicola, Jacaré and Mangueira). Checklist comparison resulted in 62 fish species distributed in 24 families, with Characidae (19 species) and Cichlidae (7) showing the highest species richness. Six species are cited for the first time in the reserve: Trachelyopterus lucenai (Auchenipteridae), Hoplosternum littorale (Callichthyidae), Rineloricaria cadeae (Loricariidae), Eigenmannia trilineata (Sternopygidae), Odontesthes mirinensis and O. perugiae (Atherinopsidae). Apparently, the black catfish T. lucenai invaded the system in the last decade and became one of the dominant species in the pelagic waters. Although differences in gears hindered direct comparisons, differences in species composition and dominance patterns between shallow margins and pelagic waters of lakes seem to occur in the lakes. A more diverse assemblage dominated by small fishes (< 5cm) occurred in the protected, vegetated lakes margins. In contrast, an assemblage with lower species richness comprised of larger fishes (> 15 cm) seemed to dominate in pelagic waters.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000200012&lng=en&tlng=ensubtropical wetlandNeotropical fishesEcological ReserveInvasive speciesPatos-Mirim Lagoon complex |
| spellingShingle | Alexandre M. Garcia Marlise A. Bemvenuti João P. Vieira David M. L. Motta Marques Marcelo D. M. Burns Alex Moresco Mario Vinicius L. Condini Checklist comparison and dominance patterns of the fish fauna at Taim Wetland, South Brazil Neotropical Ichthyology subtropical wetland Neotropical fishes Ecological Reserve Invasive species Patos-Mirim Lagoon complex |
| title | Checklist comparison and dominance patterns of the fish fauna at Taim Wetland, South Brazil |
| title_full | Checklist comparison and dominance patterns of the fish fauna at Taim Wetland, South Brazil |
| title_fullStr | Checklist comparison and dominance patterns of the fish fauna at Taim Wetland, South Brazil |
| title_full_unstemmed | Checklist comparison and dominance patterns of the fish fauna at Taim Wetland, South Brazil |
| title_short | Checklist comparison and dominance patterns of the fish fauna at Taim Wetland, South Brazil |
| title_sort | checklist comparison and dominance patterns of the fish fauna at taim wetland south brazil |
| topic | subtropical wetland Neotropical fishes Ecological Reserve Invasive species Patos-Mirim Lagoon complex |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000200012&lng=en&tlng=en |
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