Spatial variation in the stable isotopes of 13C and 15N and trophic position of Leporinus friderici (Characiformes, Anostomidae) in Corumbá Reservoir, Brazil
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| Format: | Artículo científico |
| Language: | en |
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Academia Brasileira de Ciências
2007
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| author | Alexandre Leandro Pereira |
| author_facet | Alexandre Leandro Pereira |
| contents | Spatial variation in the stable isotopes of 13C and 15N and trophic position of Leporinus friderici (Characiformes, Anostomidae) in Corumbá Reservoir, Brazil Alexandre Leandro Pereira Evanilde Benedito Cássia M. Sakuragui Multidisciplinaria (Ciencias Naturales y Exactas) food web reservoir stable isotopes Leporinus friderici Stable isotopes of carbon (δ13C) and nitrogen (δ15N) were used to describe sources of energy and trophic position foradult Leporinus friderici in the area of the Corumbá Reservoir, Brazil. Samples were collected from April 1999 to March2000. Spatial variations were not identified in the isotopic composition. The maximum and minimum contribution ofC4 plants calculated integrating the variation of plants and fish were 47.7% and 2.4%, respectively. Among C3 plants,periphyton presented closer isotopic values to those observed for fishes, corresponding to an important carbon source.The proportion of ingested plant item is larger in rivers upstream from the reservoir (42.7%), which justifies the smallertrophic level among there. However, in the reservoir, the ingestion offish was 81.4%, while ingested plants contributedwith 18.6%. Downstream from the dam, participation of plant item was even smaller (14.4%). Although the trophicposition calculated with diet data was proportional to the one calculated with δ15N values, the former elevated thetrophic level of L. friderici in the food web, because estimated trophic positions were based on fish items belonging tothe 2nd (a) and to the 3rd (b) trophic levels. 2007 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32779106 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.1 Vol.79 |
| format | Artículo científico |
| id | redalyc_32779106 |
| institution | Redalyc |
| language | en |
| publishDate | 2007 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | Spatial variation in the stable isotopes of 13C and 15N and trophic position of Leporinus friderici (Characiformes, Anostomidae) in Corumbá Reservoir, Brazil Alexandre Leandro Pereira Multidisciplinaria (Ciencias Naturales y Exactas) food web reservoir stable isotopes Leporinus friderici Spatial variation in the stable isotopes of 13C and 15N and trophic position of Leporinus friderici (Characiformes, Anostomidae) in Corumbá Reservoir, Brazil Alexandre Leandro Pereira Evanilde Benedito Cássia M. Sakuragui Multidisciplinaria (Ciencias Naturales y Exactas) food web reservoir stable isotopes Leporinus friderici Stable isotopes of carbon (δ13C) and nitrogen (δ15N) were used to describe sources of energy and trophic position foradult Leporinus friderici in the area of the Corumbá Reservoir, Brazil. Samples were collected from April 1999 to March2000. Spatial variations were not identified in the isotopic composition. The maximum and minimum contribution ofC4 plants calculated integrating the variation of plants and fish were 47.7% and 2.4%, respectively. Among C3 plants,periphyton presented closer isotopic values to those observed for fishes, corresponding to an important carbon source.The proportion of ingested plant item is larger in rivers upstream from the reservoir (42.7%), which justifies the smallertrophic level among there. However, in the reservoir, the ingestion offish was 81.4%, while ingested plants contributedwith 18.6%. Downstream from the dam, participation of plant item was even smaller (14.4%). Although the trophicposition calculated with diet data was proportional to the one calculated with δ15N values, the former elevated thetrophic level of L. friderici in the food web, because estimated trophic positions were based on fish items belonging tothe 2nd (a) and to the 3rd (b) trophic levels. 2007 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32779106 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.1 Vol.79 |
| title | Spatial variation in the stable isotopes of 13C and 15N and trophic position of Leporinus friderici (Characiformes, Anostomidae) in Corumbá Reservoir, Brazil |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) food web reservoir stable isotopes Leporinus friderici |
| url | https://www.redalyc.org/articulo.oa?id=32779106 |