|
|
|
|
|
| Fiori,Leandro Fabrício; Figueiredo,Bruno R. S.; Pavanello,Audrei; Alves,Vander Silva; Mathias,Paulo Cezar de Freitas; Benedito,Evanilde. |
| ABSTRACT Considering that the anti-predation behaviour of prey fishes may vary with predator hunting strategy, we experimentally investigated the physiological responses of Astyanax bimaculatus (Linnaeus, 1758) shoals to the presence of two piscivorous fish species with different hunting modes: sit-and-wait and active pursuit. In addition, we evaluated the influence of underwater visibility conditions on the interaction between predator and prey. We tested the hypotheses that: (i) prey plasma cortisol and glucose levels vary according to piscivore hunting strategy, and (ii) no reduction in plasma glucose and cortisol levels takes place in turbid environments due to the inability of prey to accurately recognise predators by non-visual signals. The results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Metabolism; Hoplias aff. malabaricus; Astronotus crassipinnis; Astyanax bimaculatus; Turbidity. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212018000100232 |
| |
|
|
| Silva,Márcio J. da; Figueiredo,Bruno R. S.; Ramos,Robson T. C.; Medeiros,Elvio S. F.. |
| Temporary and semi-permanent aquatic habitats in semi-arid Brazil have been reported as important sites supporting a diverse fish fauna. As such, they must be able to trophically sustain fish species that feed at different trophic levels. This study aims to describe the diets of Astyanax aff. bimaculatus, Hoplias malabaricus and Prochilodus brevis in aquatic systems in semi-arid Brazil, providing evidence of the importance of these habitats as supporters of large consumers like fish. The diet of the three species studied was diverse, feeding on a range of food items, from microalgae to fish. Despite that, a few items were more important to each of the study species. These results and the relatively high rates of stomach fullness indicate that a diverse and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Astyanax aff. bimaculatus; Hoplias malabaricus; Prochilodus brevis; Intermittent habitats; Caatinga. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000400012 |
| |
|
|
| Alves,Gustavo Henrique Zaia; Santos,Regiane da Silva; Figueiredo,Bruno R. S.; Manetta,Gislaine Iachstel; Message,Hugo José; Pazianoto,Laryssa H. R.; Guimarães,Gilson Burigo; Benedito,Evanilde; Couto,Edivando Vitor do. |
| Abstract: The Devonian Escarpment (DEEPA), located in the south of Brazil, represents an important area of environmental preservation composed by grasslands, gallery forests, as well as rock outcrops and archaeological sites. A law project (LP 527/2016), which suggests a reduction of the DEEPA area in approximately 70% of its original area (from 393,579 to 125,895 ha), is currently being processed in the Paraná State House of Representatives. Such reduction seems to be related to economic interests (mainly agriculture and mining) in the state of Paraná. If approved, LP 527/2016 will allow farmers to deliberately expand their activities, with the suppression of natural forest as main consequence. Additionally, loss of faunal diversity, contamination of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental law; Grassland; Devonian Escarpment; Biodiversity loss; Geodiversity. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000100401 |
| |
|
|
|
