Produção Nacional
Alterações histológicas em placas ósseas do peixe cascudo Rineloricaria strigilata (Hensel) (Teleostei, Loricariidae) e sua freqüência no lago Guaíba, Rio Grande do Sul, Brasil
2001; Sociedade Brasileira de Zoologia; Volume: 18; Issue: 3 Linguagem: Inglês
10.1590/s0101-81752001000300006
ISSN1806-969X
AutoresFábio Flores-Lopes, Luiz Roberto Malabarba, Edson H. L. Pereira, José F. Pezzi da Silva,
Tópico(s)Microplastics and Plastic Pollution
ResumoDescription of histological abnormalities in lhe bony plates of the loricariid catfish Rilleloricaria slrigi/ala (Hensel) (Teleostei, Loricariidae) and analysis of its frequeney in the lake Guaíba, Rio Grande do Sul, Bl'azil.Lirrle informarion is available abour natural populations oftishes exposed to polluted waters in Brazil.Contaminanls may be lethal or predispose jishes lo siekness, being lhe analysis ofaquatic organisms a good indicaror 01' environmental quality.The violinha, Rine/oricaria slrigi/ala (Hensel, 1868), is a common loricariid calfish in the Guaíba lake basin, Rio Grande do Sul, Brazil, and has been seleeted as a bioindieator for being resident, occwTing in more than 50% of lhe samples.and by showing externally detectable neoplasies.These are characterized by its dark pigmenlation, bony plates hypertrophy, and hypertrophy and irregular arrangemenl ofthe odonlodes.Ilislology showed hypertrophied epitelial tissues, with an increased number of secretOlY cells, blood cells, and melanina pigmenrs, giving the dark appearanee to the neoplasm.Observed JI'equeneies of neoplasm were higher in lake Guaíba lhan in eomparative samples.Inside lake Guaíba, a pattem ofdistribution ofneoplasm was observed, with rhe absence of neoplasm in tishes at the eollecred sire rhat receives warer from rio Jacuí, and frequencies of3.04 to 16.81% in the collecrion localities in ti"onr ofPorto Alegre and downstreamlocalities, that receive water from rio JacuÍ, rio dos Sinos and rio Gravataí, that drain urban and industrial area of POIio Alegre and neighborhood ciries.
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