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Antioxidant responses of Laeonereis acuta (Polychaeta) after exposure to hydrogen peroxide BJMBR
Rosa,C.E. da; Bianchini,A.; Monserrat,J.M..
The effects of H2O2 were evaluated in the estuarine worm Laeonereis acuta (Polychaeta, Nereididae) collected at the Patos Lagoon estuary (Southern Brazil) and maintained in the laboratory under controlled salinity (10 psu diluted seawater) and temperature (20°C). The worms were exposed to H2O2 (10 and 50 µM) for 4, 7, and 10 days and the following variables were determined: oxygen consumption, catalase (CAT) and glutathione peroxidase activity in both the supernatant and pellet fractions of whole body homogenates. The concentrations of non-protein sulfhydryl and lipid peroxides (LPO) were also measured. The oxygen consumption response was biphasic, decreasing after 4 days and increasing after 7 and 10 days of exposure to 50 µM H2O2 (P < 0.05). At the...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Worms; Laeonereis acuta; Hydrogen peroxide; Oxidative stress; Antioxidant enzymes; Oxygen consumption.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000200007
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Morphological variations caused by fixation techniques may lead to taxonomic confusion in Laeonereis (Polychaeta: Nereididae) Rev. Bras. Zool.
Oliveira,Verônica M.; Santos,Cinthya S. G.; Lana,Paulo C.; Camargo,Maurício G..
The nereidid polychaete Laeonereis acuta (Treadwell, 1923) is either considered to be a valid species, or a synonym of Laeonereis culveri (Webster, 1879). The species epithet, acuta, refers to the acuminate anterior region of the body followed by a widening that is visible up to the 10th setiger. The relative width of the anterior region of the body, however, has been reported in the taxonomic literature as variable for Laeonereis Hartman, 1945, a genus known from the eastern coast of North America to Patagonia (southern South America). To test whether variations in this character are real, or whether they correspond to an artifact, we analyzed morphological changes associated with different anesthesia and fixation techniques regularly used to prepare...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Laeonereis culveri; Laeonereis acuta; Morphology; Preparation techniques; Methodological errors.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000100022
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New record of Laeonereis acuta (Treadwell, 1923) (Nereididae: Polychaeta) in Northeast coast of Brazil Biota Neotropica
Pamplin,Paulo Augusto Zaitune; Almeida,Tito César Marques de; Silva-Filho,Jeremias Pereira da.
In the present study, we report the presence of the nereidid polychaete Laeonereis acuta near to the estuarine areas of Parnaíba River, extending its distribution towards the north of the northeastern Brazilian coast.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Polychaeta; New record; Laeonereis acuta; Distribution; Brazil.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000300035
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