Flood pulse influence on the feeding ecology of two Amazonian auchenipterid catfishes
ABSTRACT We assessed the flood pulse effect on the diet composition, trophic niche breadth, and the amount of food intake of two Amazonian auchenipterids with different feeding strategies. Sampling was carried out quarterly (from April/2012 to January/2014) on the middle Xingu River, using gillnets....
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Ictiologia
2022-03-01
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| Series: | Neotropical Ichthyology |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252022000100212&lng=en&tlng=en |
| _version_ | 1818744551742898176 |
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| author | Tiago Magalhães da Silva Freitas Bruno da Silveira Prudente Luciano Fogaça de Assis Montag |
| author_facet | Tiago Magalhães da Silva Freitas Bruno da Silveira Prudente Luciano Fogaça de Assis Montag |
| author_sort | Tiago Magalhães da Silva Freitas |
| collection | DOAJ |
| description | ABSTRACT We assessed the flood pulse effect on the diet composition, trophic niche breadth, and the amount of food intake of two Amazonian auchenipterids with different feeding strategies. Sampling was carried out quarterly (from April/2012 to January/2014) on the middle Xingu River, using gillnets. We measured specimens for standard length and total weight. The specimens’ stomachs were removed, weighed, and had their contents identified. We analyzed 360 stomachs of Auchenipterus nuchalis and 584 of Tocantinsia piresi. The diet of A. nuchalis was mainly composed of aquatic insects and crustaceans, while T. piresi fed on fruits and seeds. The diet composition of both species varied seasonally, but only T. piresi changed its trophic niche breadth in response to hydrological changes, becoming more specialist during the higher water periods (filling and flood). Both species also showed differences in their amount of food intake between hydrological periods, with A. nuchalis feeding more intensely in lower water periods (ebb and dry), while T. piresi in the higher water periods. We evidenced different responses to the hydrological periods for the related species. We emphasize that studies considering the relationship between flood pulse and feeding ecology of the organisms are essential to understanding river floodplain systems’ dynamics. |
| first_indexed | 2024-12-18T02:46:07Z |
| format | Article |
| id | doaj.art-49a37ada87cd4e66bfe98d4a8d9463e2 |
| institution | Directory Open Access Journal |
| issn | 1982-0224 |
| language | English |
| last_indexed | 2024-12-18T02:46:07Z |
| publishDate | 2022-03-01 |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj.art-49a37ada87cd4e66bfe98d4a8d9463e22022-12-21T21:23:33ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-02242022-03-0120110.1590/1982-0224-2021-0103Flood pulse influence on the feeding ecology of two Amazonian auchenipterid catfishesTiago Magalhães da Silva Freitashttps://orcid.org/0000-0003-3203-3408Bruno da Silveira Prudentehttps://orcid.org/0000-0003-4226-2431Luciano Fogaça de Assis Montaghttps://orcid.org/0000-0001-9370-6747ABSTRACT We assessed the flood pulse effect on the diet composition, trophic niche breadth, and the amount of food intake of two Amazonian auchenipterids with different feeding strategies. Sampling was carried out quarterly (from April/2012 to January/2014) on the middle Xingu River, using gillnets. We measured specimens for standard length and total weight. The specimens’ stomachs were removed, weighed, and had their contents identified. We analyzed 360 stomachs of Auchenipterus nuchalis and 584 of Tocantinsia piresi. The diet of A. nuchalis was mainly composed of aquatic insects and crustaceans, while T. piresi fed on fruits and seeds. The diet composition of both species varied seasonally, but only T. piresi changed its trophic niche breadth in response to hydrological changes, becoming more specialist during the higher water periods (filling and flood). Both species also showed differences in their amount of food intake between hydrological periods, with A. nuchalis feeding more intensely in lower water periods (ebb and dry), while T. piresi in the higher water periods. We evidenced different responses to the hydrological periods for the related species. We emphasize that studies considering the relationship between flood pulse and feeding ecology of the organisms are essential to understanding river floodplain systems’ dynamics.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252022000100212&lng=en&tlng=enAmazon basinDietNiche breadthSiluriformesXingu River |
| spellingShingle | Tiago Magalhães da Silva Freitas Bruno da Silveira Prudente Luciano Fogaça de Assis Montag Flood pulse influence on the feeding ecology of two Amazonian auchenipterid catfishes Neotropical Ichthyology Amazon basin Diet Niche breadth Siluriformes Xingu River |
| title | Flood pulse influence on the feeding ecology of two Amazonian auchenipterid catfishes |
| title_full | Flood pulse influence on the feeding ecology of two Amazonian auchenipterid catfishes |
| title_fullStr | Flood pulse influence on the feeding ecology of two Amazonian auchenipterid catfishes |
| title_full_unstemmed | Flood pulse influence on the feeding ecology of two Amazonian auchenipterid catfishes |
| title_short | Flood pulse influence on the feeding ecology of two Amazonian auchenipterid catfishes |
| title_sort | flood pulse influence on the feeding ecology of two amazonian auchenipterid catfishes |
| topic | Amazon basin Diet Niche breadth Siluriformes Xingu River |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252022000100212&lng=en&tlng=en |
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