Length-weight relationships and condition factor of the eaglebeak pacu Ossubtus xinguense Jégu, 1992 (Characiformes, Serrasalmidae), an endangered species from Rio Xingu rapids, northern Brazil

Abstract This study reports on the length-weight relationships and condition factor for the endangered rheophilic fish Ossubtus xinguense Jégu from Rio Xingu rapids. This species is threatened by construction of the third largest hydroelectric in the world, the Belo Monte dam close to the city of Altamira, northern Brazil. Specimens were collected in the dry season between July 2012 and September 2012. Male specimens have body length larger than females, atypical in serrasalmid fishes, and different length-weight relationships were found between adult and juvenile specimens. This study presents the first biological characteristics for O. xinguense

Length-weight relationships and condition factor of the eaglebeak pacu Ossubtus xinguense Jégu, 1992 (Characiformes, Serrasalmidae), an endangered species from Rio Xingu rapids, northern Brazil

Abstract This study reports on the length-weight relationships and condition factor for the endangered rheophilic fish Ossubtus xinguense Jégu from Rio Xingu rapids. This species is threatened by construction of the third largest hydroelectric in the world, the Belo Monte dam close to the city of Altamira, northern Brazil. Specimens were collected in the dry season between July 2012 and September 2012. Male specimens have body length larger than females, atypical in serrasalmid fishes, and different length-weight relationships were found between adult and juvenile specimens. This study presents the first biological characteristics for O. xinguense. Keywords: conservation, hydroelectric impacts, growth stanzas, rheophilic fish, endemic species. Relações peso-comprimento e fator de condição do pacu-capivara Ossubtus xinguense Jégu, 1992 (Characiformes, Serrasalmidae), uma espécie ameaçada de extinção das corredeiras do Rio Xingu, norte do Brasil Resumo Este estudo relata as relações peso-comprimento e fator de condição para o peixe reofílico ameaçado de extinção Ossubtus xinguense Jégu. Esta espécie, endêmica das corredeiras do Rio Xingu, é ameaçada pela construção da terceira maior hidrelétrica do mundo, denominada Belo Monte localizada às proximidades da cidade de Altamira, norte do Brasil. Os espécimes foram coletados na estação seca do rio, entre julho e setembro de 2012. Espécimes machos apresentaram tamanho corporal maior que fêmeas, condição atípica entre os peixes serrasalmídeos, e diferentes relações peso-comprimento foram encontradas entre espécimes juvenis e adultos. Este estudo apresenta as primeiras características biológicas para O. xinguense. Palavras-chave: conservação, impactos por hidrelétricas, estrofes de crescimento, peixe reofílico, espécie endêmica

Effect of seasonal flooding cycle on litterfall production in alluvial rainforest on the middle Xingu River (Amazon basin, Brazil)

Abstract The assumption for this study was that litterfall in floodplain environments of the middle Xingu river follows a pattern of seasonal variation. According to this view, litterfall production (total and fractions) was estimated in four alluvial rainforest sites on the middle Xingu River over an annual cycle, and examined the effect of seasonal flooding cycle. The sites included two marginal flooded forests of insular lakes (Ilha Grande and Pimentel) and two flooded forests on the banks of the Xingu itself (Boa Esperança and Arroz Cru). Total litterfall correlated with rainfall and river levels, but whereas the leaf and fruit fractions followed this general pattern, the flower fraction presented an inverse pattern, peaking in the dry season. The litterfall patterns recorded in the present study were consistent with those recorded at other Amazonian sites, and in some other tropical ecosystems

Concepções de acadêmicos de enfermagem sobre usuários de drogas Concepciones de los estudiantes de enfermería sobre los usuarios de drogas Nursing students' conceptions about the user of drugs

OBJETO DO ESTUDO: Concepções dos graduandos de enfermagem sobre a abordagem ao paciente usuário de drogas. OBJETIVOS: Descrever a concepção dos estudantes de enfermagem sobre os usuários de drogas. MÉTODO: Estudo descritivo-exploratório desenvolvido com 321 estudantes de 15 Instituições privadas de Ensino Superior de Enfermagem, no estado do Rio de Janeiro. Utilizou-se a escala de atitudes e crenças NEADA, aplicada entre junho de 2006 e agosto de 2007. Os resultados evidenciam que as dificuldades em abordar um cliente que faz uso de drogas são reais, mas as limitações pessoais dos profissionais em atender essa clientela ainda permeiam a assistência, influenciando no cuidado.<br>OBJECTO DEL ESTUDIO: Concepciones de los estudiantes de enfermería sobre el acercamiento a un paciente usuario de drogas. OBJECTIVOS: describir la concepción de los estudiantes de enfermería en los usuarios de drogas. METODO: estudio descriptivo-exploratorio lo cual se desarrolló con 321 estudiantes de 15 escuelas privadas de grado en enfermería en el estado de Rio de Janeiro. La escala de actitudes y creencia NEADA hay sido utlizada y aplicada el junio del 2006 hasta el Agosto del 2007. Los resultados revelan que las dificultades en abordar a un cliente que usa drogas són verdaderos, pero en la asistencia a estos clientes todavía las limitaciones personales de los profesionales impregnan en la asistencia, influyendo en el cuidado.<br>STUDY'S OBJECT: Conceptions of nursing students on the approach to the drugs user. OBJECTIVES: To describe the conceptions of nursing students about the user of drugs. METHOD: Descriptive-exploratory study carried out with 321 students from 15 private nursing schools in the state of Rio de Janeiro. The scale of attitudes and beliefs NEADA was used to obtain the data between June 2006 and August 2007. The results demonstrate that the difficulties in dealing with the client who is a drug user are real, but the personal limitations of professionals in work with this kind of client still permeate the assistance, influencing care