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| RIBEIRO,Thamy Santos; UEDA,Bruno Hideo; PAVANELLI,Gilberto Cezar; TAKEMOTO,Ricardo Massato. |
| ABSTRACTCongeneric host species present similar biological and behavioral aspects, what may favor the presence of a similar parasite fauna. The aim of the present study was to compare the composition and structure of the parasite community from congeneric species, Brycon amazonicus and B. melanopterus, collected on the Negro and Solimões Rivers. The fish internal organs were longitudinally opened and analyzed under stereomicroscope. The examination revealed that B. amazonicuswas parasitized by Procamallanus(Spirocamallanus) inopinatus(26.7% and 35.5%), Contracaecum type 2 (10% and 16.13%) and Rhabdochona acuminata(0% and 3.23%), prevalence values for Negro and Solimões River, respectively. The analysis of B. melanopterus, a fish species found only in the... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Negro River; Solimões River; 'matrinxã'; Metazoan parasites; Nematode. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000100107 |
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| López-Lanús,Bernabé; Laverde,Oscar; Omena Jr.,Reynier; Olarte,Luis G.. |
| It is generally understood that the Anodorhynchus genus of macaws does not spread north of the Amazon River. However, recent published information suggests that the endangered Hyacinth Macaw Anodorhynchus hyacinthinus may occur in the region of the Papurí River, lower Vaupés, in Amazonian Colombia. This information is hypothetical, based on old reports and observations with imprecise geographical data. Our objective was to confirm the presence of macaws of the genus Anodorhynchus in the lower Vaupés, Colombia, and in nearby Negro River, Brazil. We carried out fieldwork and interviews from September 2004 to July 2005, but we failed to locate the species. Notwithstanding, we received information from 8% of the interviewed members of local ethnic groups... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anodorhynchus; Brazil; Colombia; Interviews; Lower Vaupes; Negro River. |
| Ano: 2009 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072009000100006 |
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| Baldisserotto,Bernardo; Copatti,Carlos Eduardo; Gomes,Levy Carvalho; Chagas,Edsandra Campos; Brinn,Richard Philip; Roubach,Rodrigo. |
| Fishes that live in the Amazonian environment may be exposed to several kinds of waters: "black waters", containing high dissolved organic carbon and acidic pH, "white waters", with ten fold higher Ca2+ concentrations than black waters and neutral pH, and "clear waters", with two fold higher Ca2+ concentrations than black waters and also neutral pH. Therefore, the aim of the present study was to analyze Ca2+ fluxes in the facultative air-breather Hoplosternum littorale (tamoatá) exposed to different Amazonian waters. Fishes were acclimated in well water (similar to clear water) and later placed in individual chambers for Ca2+ fluxes measurements. After 4 h, water from the chambers was replaced by a different type of water. Transfer of tamoatás to ion-poor... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ion flux; Negro River; Amazon River; Acidic water. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000300014 |
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