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| Birck,Tiago; Message,Hugo José; Baumgartner,Gilmar; Sebastien,Nyamien Yahaut; Baumgartner,Dirceu. |
| ABSTRACT The predator-prey relationships between juvenile Nile Tilapia Oreochromis niloticus and native fish species of the Paraná River basin, Brazil, were experimentally examined. Juveniles of O. niloticus were offered to three native predator species (Salminus brasiliensis, Pseudoplatystoma corruscans, and Brycon orbignyanus) in 2,000-L tanks with four levels of habitat complexity (0%, 50%, 100% and RD (rocks and driftwood)). Predator efficiency was more variable among species (S. brasiliensis consumed 86.6% of the prey, P. corruscans 22.5% and B. orbignyanus 18.3%) than among levels of habitat complexity, and S. brasiliensis was faster than the others in detecting and consuming the prey. The higher predatory efficiency observed for S. brasiliensis can... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Invasion; Management; Oreochromis niloticus; Predation; Prey. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000300204 |
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| 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 |
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