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Occurrence of concavities on the lorica of two species of Testudinella (Rotifera, Monogononta, Testudinellidae) Biota Neotropica
Coelho,Paula Nunes; Braghin,Louizi Souza Magalhães; Lansac-Tôha,Fabio Amodêo; Henry,Raoul.
Abstract: Testudinella is a taxon of Rotifera broadly distributed in Brazil. In a recent collection in marginal lakes connected to the Paranapanema River (São Paulo, Brazil), we found specimens of Testudinella mucronata and T. patina with concavities on their lorica. The objective of this study was to describe the concavities observed in individuals of both species and discuss their possible causes. Plankton samples were collected at two sampling stations, in the pelagic (PZ) and littoral (LZ) zones of the Panema and Coqueiral lakes; both of these lakes are ultra-oligotrophic and not polluted. For T. mucronata, 4% of individuals with concavities were found in the PZ of Coqueiral lake and 50% in the LZ of Panema lake. In T. patina, the proportion of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Freshwater environments; Marginal lakes; Morphology; Rotifers; Polymorphism.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000200205
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Oligochaeta (Annelida: Clitellata) in the Juruena River, MT, Brazil: species indicators of substrate types Biota Neotropica
Gorni,Guilherme Rossi; Sanches,Nathalie Aparecida de Oliveira; Colombo-Corbi,Vanessa; Corbi,Juliano José.
Abstract: Oligochaeta assemblages are important components in freshwater environments, where their abundance and composition may indicate aspects related to water quality and sediment. The lack of information about these communities in Brazilian aquatic environments, as well as the application of native species as bioindicators of lotic environmental, stimulated the conception of this paper. Thus, the aim was to study the community of aquatic Oligochaeta in selected stretches of the Juruena River (MT), thereby generating grounds for future environmental monitoring action in lotic ecosystems. For this purpose, samples were analyzed at bimonthly intervals during the period from January to November 2009, in stretches of the Juruena River (Amazon River Basin)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Freshwater oligochaetes; Bioindicators; Lotic environments; Freshwater environments.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000400206
Registros recuperados: 2
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