Please use this identifier to cite or link to this item: https://repositorio.inpa.gov.br/handle/1/18784
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dc.contributor.authorSoares, Maria Gercilia Mota-
dc.contributor.authorMenezes, Naércio Aquino-
dc.contributor.authorJunk, Wolfgang Johannes-
dc.date.accessioned2020-06-15T22:03:01Z-
dc.date.available2020-06-15T22:03:01Z-
dc.date.issued2006-
dc.identifier.urihttps://repositorio.inpa.gov.br/handle/1/18784-
dc.description.abstractPronounced seasonal and daily oxygen concentration changes are characteristic for Amazonian floodplain lakes. Studies on the fish fauna of the Lago Camaleão, Solimões River, Amazonas, Brazil, showed several fish species which are able to survive prolonged periods of heavy hypoxia. Twenty species belonging to eight families were observed in the laboratory in order to determine their respiratory adaptations to hypoxic conditions and oxygen concentrations at which the fish present respiratory adaptations. Finally, the fish species were distributed throughout the habitats of Lake Camaleão according to their adaptation responses. Ten fish species used the surface water for aquatic surface respiration, four species used atmospheric oxygen for aerial respiration, four species used oxygen supplied by the exudation of the roots of floating macrophytes and two exhibited a high tolerance to hypoxic conditions, and well-developed physiological biochemical mechanisms. The fish fauna is well adapted to low oxygen concentrations. The large variety of morpho-anatomical adaptations associated with biochemical and physiological mechanisms to tolerate hypoxic and anoxic conditions enable the 20 fish species to exploit several habitats of Lago Camaleão, such as floating aquatic macrophyte meadows, open water and near the shoreline. © Springer 2006.en
dc.language.isoenpt_BR
dc.relation.ispartofVolume 568, Número 1, Pags. 353-367pt_BR
dc.rightsRestrito*
dc.subjectConcentration (process)en
dc.subjectFisheriesen
dc.subjectFloodsen
dc.subjectOxygenen
dc.subjectRespiratorsen
dc.subjectRiversen
dc.subjectSurface Water Resourcesen
dc.subjectAerial Respirationen
dc.subjectAquatic Surface Respirationen
dc.subjectFishesen
dc.subjectFloodplain Lakeen
dc.subjectGill Ventilationen
dc.subjectHypoxiaen
dc.subjectBiodiversityen
dc.subjectAdaptationen
dc.subjectFishen
dc.subjectFloodplainen
dc.subjectHypoxiaen
dc.subjectLakeen
dc.subjectOxygenen
dc.subjectPhysiologyen
dc.subjectRespirationen
dc.subjectAmazonasen
dc.subjectBrasilen
dc.subjectCamaleao Lakeen
dc.subjectSolimoes Basinen
dc.subjectSouth Americaen
dc.titleAdaptations of fish species to oxygen depletion in a central Amazonian floodplain lakeen
dc.typeArtigopt_BR
dc.identifier.doi10.1007/s10750-006-0207-z-
dc.publisher.journalHydrobiologiapt_BR
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