Population biology of Astyanax lacustris (Pisces, Characiformes) in a Neotropical reservoir and its tributaries

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dc.contributor.authorVidotto-magnoni, Ana P.
dc.contributor.authorKurchevski, Gregório
dc.contributor.authorDe Lima, Felipe P. [UNESP]
dc.contributor.authorNobile, André B. [UNESP]
dc.contributor.authorGarcia, Diego A.z.
dc.contributor.authorCasimiro, Armando C.r.
dc.contributor.authorPereira, Alan D.
dc.contributor.authorOrsi, Mário L.
dc.contributor.institutionUniversidade Estadual de Londrina
dc.contributor.institutionUniversidade Federal de Minas Gerais
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2021-07-14T10:18:24Z
dc.date.available2021-07-14T10:18:24Z
dc.date.issued2021-07-07
dc.description.abstractThe aging process of reservoirs has been extensively investigated; however, little is known about how fish populations are adjusted after many years of impoundment. Thus, this study aimed to compare the diet, length-weight relationship, sizes classes, variation in size, and age of Astyanax lacustris Lütken, 1875 collected from lotic and lentic habitats of an aging reservoir. The study group consisted of 730 captured fishes. We found that specimens collected from lotic habitats had a wider range of size classes (1.0 to 12.0 cm), were linked to a high frequency of juveniles (48.7%), and had greater feeding activity (higher stomach fullness). In contrast, fishes collected from lentic environments exhibited high rates of capture (78.4%), increased frequency of adults (87.3%), and higher values of mean standard length. The length-weight relationship indicated that lentic fishes were heavier than fish collected from lotic areas. Moreover, we observed 37 food items in A. lacustris diet, mainly plant material, algae, Cladocera, Hymenoptera, Coleoptera, and Ephemeroptera. Differences among the diet of fishes between sites were evidenced with Permanova (p < 0.05). Astyanax lacustris can be considered a persistent species in Chavantes Reservoir after aging, encountering conditions to complete its life span and adjusting to food resources.en
dc.description.affiliationUniversidade Estadual de Londrina, Centro de Ciências Biológicas
dc.description.affiliationUniversidade Federal de Minas Gerais, Centro de Transposição de Peixes
dc.description.affiliationUniversidade Estadual Paulista, Instituto de Biociências de Botucatu
dc.description.affiliationUnespUniversidade Estadual Paulista, Instituto de Biociências de Botucatu
dc.format.extent-
dc.identifierhttp://dx.doi.org/10.1590/0001-3765202120190565
dc.identifier.citationAnais da Academia Brasileira de Ciências. Academia Brasileira de Ciências, v. 93, n. 2, p. -, 2021.
dc.identifier.doi10.1590/0001-3765202120190565
dc.identifier.fileS0001-37652021000301028.pdf
dc.identifier.issn0001-3765
dc.identifier.issn1678-2690
dc.identifier.scieloS0001-37652021000301028
dc.identifier.urihttp://hdl.handle.net/11449/211046
dc.language.isoeng
dc.publisherAcademia Brasileira de Ciências
dc.relation.ispartofAnais da Academia Brasileira de Ciências
dc.rights.accessRightsAcesso aberto
dc.sourceSciELO
dc.subjectCharacidaeen
dc.subjectnative speciesen
dc.subjectreservoir agingen
dc.subjectupper Paraná River basinen
dc.titlePopulation biology of Astyanax lacustris (Pisces, Characiformes) in a Neotropical reservoir and its tributariesen
dc.typeArtigo
unesp.author.orcid0000-0003-1819-7019[1]
unesp.author.orcid0000-0003-2178-2323[2]
unesp.author.orcid0000-0003-2315-0397[3]
unesp.author.orcid0000-0002-8502-6415[4]
unesp.author.orcid0000-0001-5709-6347[5]
unesp.author.orcid0000-0001-8826-5609[6]
unesp.author.orcid0000-0002-3182-2344[7]
unesp.author.orcid0000-0001-9545-4985[8]

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