Spatial and temporal variation in population structure of Hemigrammus marginatus (Characiformes: Characidae) in streams of the Ivinhema River Basin, Brazil

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dc.contributor.authorLoureņco, da Luzia Silva [UNESP]
dc.contributor.authorFernandes, Izaias Médice
dc.contributor.authorSúarez, Yzel Rondón
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionInstituto Nacional de Pesquisas da Amazonia
dc.contributor.institutionUniversidade Estadual de Mato Grossodo Sul
dc.date.accessioned2022-04-28T18:58:00Z
dc.date.available2022-04-28T18:58:00Z
dc.date.issued2012-08-01
dc.description.abstractThe present study has assessed spatial and temporal variations in the length structure of Hemigrammus marginatus Ellis, 1911 and estimated growth parameters for the species. Sampling was carried out in five streams in the Vitoria and Piravevě sub-basins of the Ivinhema River from January to December 2002. A total of 933 specimens of H. marginatus were caught (97 in the Vitoria sub-basin and 836 in the Piravevě sub-basin). Mean length of the individuals caught in the Piravevě sub-basin was shorter (21.58 mm, SD = 4.67) than that of individuals caught in the Vitoria sub-basin (29.24 mm, SD = 4.42). Analysis of condition factor calculated from the weight/length relationship revealed that the values were constant both spatially (between sub-basins) and temporally (throughout the year). In the Piravevě sub-basin, the theoretical maximal length estimated for this species was 37.26 mm, with natural mortality rate of 1.22 year1, growth rate (k) of 0.66 year1, and growth performance index (9) of 3.80 and 4.25 years of longevity. The input of new individuals in the population occurs twice per year, with greater recruitment at the peak of the rainy season (May) and the peak of the dry season (August). © 2012 Sociedade Brasileira de Zoología. All rights reserved.en
dc.description.affiliationUniversidade Estadual Paulista, Caixa Postal 199, 13506-900 Rio Claro, SP
dc.description.affiliationInstituto Nacional de Pesquisas da Amazonia, Caixa Postal 478, 69011-970 Manaus, AM
dc.description.affiliationLaboratorio de Ecologia Centro Integrado de Análise e Monitoramento Ambiental Universidade Estadual de Mato Grossodo Sul, Rodovia Dourados-ltahum km 12, 79804-970 Dourados, MS
dc.description.affiliationUnespUniversidade Estadual Paulista, Caixa Postal 199, 13506-900 Rio Claro, SP
dc.format.extent300-307
dc.identifierhttp://dx.doi.org/10.1590/S1984-4670201 2000400003
dc.identifier.citationZoologia, v. 29, n. 4, p. 300-307, 2012.
dc.identifier.doi10.1590/S1984-4670201 2000400003
dc.identifier.issn1984-4670
dc.identifier.scopus2-s2.0-84865610587
dc.identifier.urihttp://hdl.handle.net/11449/219829
dc.language.isoeng
dc.relation.ispartofZoologia
dc.sourceScopus
dc.subjectAge
dc.subjectGrowth
dc.subjectMortality
dc.subjectRecruitment
dc.subjectWeight-length relationship
dc.titleSpatial and temporal variation in population structure of Hemigrammus marginatus (Characiformes: Characidae) in streams of the Ivinhema River Basin, Brazilen
dc.typeArtigo

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