Diet of Astyanax paranae (Characidae) in streams with different riparian land covers in the Passa-Cinco River basin, southeastern Brazil
An analysis of the diet of Astyanax paranae Eigenmann, 1914 in nine streams located in the Passa-Cinco River basin (upper Paraná River system) was performed to investigate the feeding habits of this species, check for possible spatial variations in diet and to investigate the influence of riparian v...
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| Format: | Article |
| Language: | English |
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Fundação Zoobotânica do Rio Grande do Sul
2012-03-01
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| Series: | Iheringia: Série Zoologia |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000100011&lng=en&tlng=en |
| _version_ | 1819106800854630400 |
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| author | Anderson Ferreira Pedro Gerhard José E. P. Cyrino |
| author_facet | Anderson Ferreira Pedro Gerhard José E. P. Cyrino |
| author_sort | Anderson Ferreira |
| collection | DOAJ |
| description | An analysis of the diet of Astyanax paranae Eigenmann, 1914 in nine streams located in the Passa-Cinco River basin (upper Paraná River system) was performed to investigate the feeding habits of this species, check for possible spatial variations in diet and to investigate the influence of riparian vegetation in the composition of the diet. Stomach contents of 243 specimens were analyzed by the methods of relative frequency of occurrence and volume, and the diet was characterized by the alimentary index (AIi). The species showed insectivorous feeding habits, with a predominance of terrestrial and aquatic insects in the diet, varying by location. In most streams, resources of allochthonous origin were the most consumed. The participation of aquatic insects and terrestrial plants were high in most streams, while terrestrial insects and invertebrates were highest in streams with a greater presence of riparian forest. The two streams located draining pasture fields were the only places were A. paranae consumed algae and macrophyte fragments. These results were corroborated by the analysis of similarity (ANOSIM): the descriptor "percentage of riparian forest" was the highest environmental influence on the diet of A. paranae. The study shows that riparian forest percentage on the stream reach determines the species diet composition, but A. paranae is also able to gather enough food resources in a variety of severely degraded environments. |
| first_indexed | 2024-12-22T02:43:54Z |
| format | Article |
| id | doaj.art-e37dbe09416a4bfbb4caf6984ce1aeb0 |
| institution | Directory Open Access Journal |
| issn | 1678-4766 |
| language | English |
| last_indexed | 2024-12-22T02:43:54Z |
| publishDate | 2012-03-01 |
| publisher | Fundação Zoobotânica do Rio Grande do Sul |
| record_format | Article |
| series | Iheringia: Série Zoologia |
| spelling | doaj.art-e37dbe09416a4bfbb4caf6984ce1aeb02022-12-21T18:41:34ZengFundação Zoobotânica do Rio Grande do SulIheringia: Série Zoologia1678-47662012-03-011021808710.1590/S0073-47212012000100011S0073-47212012000100011Diet of Astyanax paranae (Characidae) in streams with different riparian land covers in the Passa-Cinco River basin, southeastern BrazilAnderson Ferreira0Pedro Gerhard1José E. P. Cyrino2Universidade de São PauloEmbrapaUniversidade de São PauloAn analysis of the diet of Astyanax paranae Eigenmann, 1914 in nine streams located in the Passa-Cinco River basin (upper Paraná River system) was performed to investigate the feeding habits of this species, check for possible spatial variations in diet and to investigate the influence of riparian vegetation in the composition of the diet. Stomach contents of 243 specimens were analyzed by the methods of relative frequency of occurrence and volume, and the diet was characterized by the alimentary index (AIi). The species showed insectivorous feeding habits, with a predominance of terrestrial and aquatic insects in the diet, varying by location. In most streams, resources of allochthonous origin were the most consumed. The participation of aquatic insects and terrestrial plants were high in most streams, while terrestrial insects and invertebrates were highest in streams with a greater presence of riparian forest. The two streams located draining pasture fields were the only places were A. paranae consumed algae and macrophyte fragments. These results were corroborated by the analysis of similarity (ANOSIM): the descriptor "percentage of riparian forest" was the highest environmental influence on the diet of A. paranae. The study shows that riparian forest percentage on the stream reach determines the species diet composition, but A. paranae is also able to gather enough food resources in a variety of severely degraded environments.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000100011&lng=en&tlng=enEcologia alimentarCharaciformespeixes insetívorosfatores ambientais |
| spellingShingle | Anderson Ferreira Pedro Gerhard José E. P. Cyrino Diet of Astyanax paranae (Characidae) in streams with different riparian land covers in the Passa-Cinco River basin, southeastern Brazil Iheringia: Série Zoologia Ecologia alimentar Characiformes peixes insetívoros fatores ambientais |
| title | Diet of Astyanax paranae (Characidae) in streams with different riparian land covers in the Passa-Cinco River basin, southeastern Brazil |
| title_full | Diet of Astyanax paranae (Characidae) in streams with different riparian land covers in the Passa-Cinco River basin, southeastern Brazil |
| title_fullStr | Diet of Astyanax paranae (Characidae) in streams with different riparian land covers in the Passa-Cinco River basin, southeastern Brazil |
| title_full_unstemmed | Diet of Astyanax paranae (Characidae) in streams with different riparian land covers in the Passa-Cinco River basin, southeastern Brazil |
| title_short | Diet of Astyanax paranae (Characidae) in streams with different riparian land covers in the Passa-Cinco River basin, southeastern Brazil |
| title_sort | diet of astyanax paranae characidae in streams with different riparian land covers in the passa cinco river basin southeastern brazil |
| topic | Ecologia alimentar Characiformes peixes insetívoros fatores ambientais |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000100011&lng=en&tlng=en |
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