Feeding ecology of Eigenmannia desantanai (Gymnotiformes: Sternopygidae) in southern Pantanal, Brazil
Abstract Aim This study investigated changes in the dietary composition and trophic niche breadth of Eigenmannia desantanai in the context of hydrological periods, rivers, and ontogeny. Methods Collections were performed monthly on the Paraguay and Amonguijá Rivers between February 2009 and Janua...
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Limnologia
2022-01-01
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| Series: | Acta Limnologica Brasiliensia |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2022000100703&tlng=en |
| _version_ | 1818907718804570112 |
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| author | Élida Jeronimo Gouveia Patrícia Luna Rondon Yzel Rondon Súarez |
| author_facet | Élida Jeronimo Gouveia Patrícia Luna Rondon Yzel Rondon Súarez |
| author_sort | Élida Jeronimo Gouveia |
| collection | DOAJ |
| description | Abstract Aim This study investigated changes in the dietary composition and trophic niche breadth of Eigenmannia desantanai in the context of hydrological periods, rivers, and ontogeny. Methods Collections were performed monthly on the Paraguay and Amonguijá Rivers between February 2009 and January 2011. Results A total of 338 specimens of E. desantanai were collected, 224 of which came from the Amonguijá River and 114 from the Paraguay River. In all, 21 food items were identified. Fully remains of digested animals (RDA), Chironomidae, Cladocera, and Ostracoda showed greater importance in the diet of E. desantanai. Dietary composition was influenced by hydrological periods, followed by differences between sampled rivers, and ontogeny. In contrast, only hydrological periods explained variation in the E. desantanai trophic niche breadth. Conclusions The diet of E. desantanai is mainly composed of Chironomidae, Cladocera, and Ostracoda; however, individuals consumed other food items owing to changes in hydrological periods, followed by characteristics of the Amonguijá and Paraguay Rivers and ontogenetic variation. In this respect, the results of this study are germane to the food ecology of E. desantanai, providing guidelines for the management and conservation of the species. |
| first_indexed | 2024-12-19T21:59:35Z |
| format | Article |
| id | doaj.art-69b394afacb6423da0fc0bb6efcf8ee4 |
| institution | Directory Open Access Journal |
| issn | 2179-975X |
| language | English |
| last_indexed | 2024-12-19T21:59:35Z |
| publishDate | 2022-01-01 |
| publisher | Associação Brasileira de Limnologia |
| record_format | Article |
| series | Acta Limnologica Brasiliensia |
| spelling | doaj.art-69b394afacb6423da0fc0bb6efcf8ee42022-12-21T20:04:12ZengAssociação Brasileira de LimnologiaActa Limnologica Brasiliensia2179-975X2022-01-013410.1590/s2179-975x9820Feeding ecology of Eigenmannia desantanai (Gymnotiformes: Sternopygidae) in southern Pantanal, BrazilÉlida Jeronimo Gouveiahttps://orcid.org/0000-0001-9631-7608Patrícia Luna Rondonhttps://orcid.org/0000-0002-1331-1719Yzel Rondon Súarezhttps://orcid.org/0000-0003-1226-4321Abstract Aim This study investigated changes in the dietary composition and trophic niche breadth of Eigenmannia desantanai in the context of hydrological periods, rivers, and ontogeny. Methods Collections were performed monthly on the Paraguay and Amonguijá Rivers between February 2009 and January 2011. Results A total of 338 specimens of E. desantanai were collected, 224 of which came from the Amonguijá River and 114 from the Paraguay River. In all, 21 food items were identified. Fully remains of digested animals (RDA), Chironomidae, Cladocera, and Ostracoda showed greater importance in the diet of E. desantanai. Dietary composition was influenced by hydrological periods, followed by differences between sampled rivers, and ontogeny. In contrast, only hydrological periods explained variation in the E. desantanai trophic niche breadth. Conclusions The diet of E. desantanai is mainly composed of Chironomidae, Cladocera, and Ostracoda; however, individuals consumed other food items owing to changes in hydrological periods, followed by characteristics of the Amonguijá and Paraguay Rivers and ontogenetic variation. In this respect, the results of this study are germane to the food ecology of E. desantanai, providing guidelines for the management and conservation of the species.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2022000100703&tlng=endiettuvirafloodplainParaguay RiverAmonguijá River |
| spellingShingle | Élida Jeronimo Gouveia Patrícia Luna Rondon Yzel Rondon Súarez Feeding ecology of Eigenmannia desantanai (Gymnotiformes: Sternopygidae) in southern Pantanal, Brazil Acta Limnologica Brasiliensia diet tuvira floodplain Paraguay River Amonguijá River |
| title | Feeding ecology of Eigenmannia desantanai (Gymnotiformes: Sternopygidae) in southern Pantanal, Brazil |
| title_full | Feeding ecology of Eigenmannia desantanai (Gymnotiformes: Sternopygidae) in southern Pantanal, Brazil |
| title_fullStr | Feeding ecology of Eigenmannia desantanai (Gymnotiformes: Sternopygidae) in southern Pantanal, Brazil |
| title_full_unstemmed | Feeding ecology of Eigenmannia desantanai (Gymnotiformes: Sternopygidae) in southern Pantanal, Brazil |
| title_short | Feeding ecology of Eigenmannia desantanai (Gymnotiformes: Sternopygidae) in southern Pantanal, Brazil |
| title_sort | feeding ecology of eigenmannia desantanai gymnotiformes sternopygidae in southern pantanal brazil |
| topic | diet tuvira floodplain Paraguay River Amonguijá River |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2179-975X2022000100703&tlng=en |
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