|
|
|
|
| |
|
|
| Netto-Ferreira,André L.; Albrecht,Míriam P.; Nessimian,Jorge L.; Caramaschi,Érica P.. |
| The silver hatchetfish Thoracocharax stellatus is one of the approximately 200 fish species recorded for the upper rio Tocantins, in the region where it was impounded by the Serra da Mesa hydroelectric dam. Analysis of the stomach contents of 88 specimens revealed a diet consisting almost entirely of insects (99.6%), most of which were terrestrial (87.6%). Ants, beetles, and mayflies were the main food items. Dawn and dusk seemed to be the periods of highest foraging activity for T. stellatus. As a specialist on terrestrial insects, this species has a close connection with the region near the river bank, where prey is provided from the associated riparian vegetation. Despite the impoundment and depletion of the land-water ecotone observed in later stages... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hatchetfishes; Autoecology; Diet; Tocantins-Araguaia basin. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000100009 |
| |
|
|
| Carvalho,Fernando R; Bertaco,Vinicius A; Jerep,Fernando C. |
| Hemigrammus tocantinsi is described from the upper rio Tocantins basin, Chapada dos Veadeiros, Goiás State, Central Brazil. The new species differs from its congeners by the presence of 15-17 branched anal-fin rays, longitudinal stripe relatively narrow anteriorly and wider posteriorly, and one or two maxillary teeth. Sexual dimorphism of the new species is characterized by differences among the color in life, adipose-fin origin, body measurements, in addition to presence of bony hooks in the anal and pelvic fins of males. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ostariophysi; Chapada dos Veadeiros; Neotropical fish; Tocantins-Araguaia basin; Caudal-fin scales. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000200002 |
| |
|
|
| Bertaco,Vinicius A; Jerep,Fernando C; Carvalho,Fernando R. |
| Moenkhausia dasalmas is described from the upper rio Tocantins basin, in the Chapada dos Veadeiros region, Goiás State, Central Brazil. The new species differs from all congeners by the presence of iii,9 rays in the dorsal fin. It can also be distinguished from its congeners by the presence of two humeral spots (first one vertically elongate and second one faint), by the number of branched anal-fin rays (17-19), lateral line scales (36-37), maxillary teeth (4-5), and a vertical dark spot in the caudal peduncle end. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian Cerrado; Chapada dos Veadeiros; Characiformes; Tocantins-Araguaia basin. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000100003 |
| |
|
|
|
