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You searched for +publisher:"Universidade do Rio Grande do Norte" +contributor:("Martins, Pedro Carlos Cunha"). One record found.

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Universidade do Rio Grande do Norte

1. Moura, Emerson Eduardo Silva de. Determinação da toxicidade aguda e caracterização de risco ambiental do herbicida Roundup (glifosato) sobre três espécies de peixes .

Degree: 2009, Universidade do Rio Grande do Norte

Considering their commercial importance, as these are the species of freshwater fish more commercialized in Brazil, their occurence in different kinds of aquatic environments (lakes, rivers and dams) and for being tolerant to a wide range of variation of various physical parameters and chemical water, the fish species Oreochromis niloticus, Cyprinus carpio and Colossoma macropomum were chosen for this study, furthermore, to test the toxicity we used the herbicide Roundup. The fingerlings of tilapia (Oreochromis niloticus), commun carp (Cyprinus carpio) and tambaqui (Colossoma macropomum) were submitted to the herbicide roundup in the following concentrations: 0.0 (control); 18,06; 19,10; 20,14; 21,18 and 22,22 mg.L-1, 0.0 (control); 13,89; 14,86; 15,83; 16,81 and 17,78 mg.L-1, and 0.0 (control); 18,06; 19,10; 20,14; 21,18 and 22,22 mg.L-1, respectively, three for 96 hours. The LC50 - 96h for O. niloticus, C. carpio and C. macropomum was 21,63, 15,33 and 20,06 mg.L-1 of the herbicide roundup, respectively. The results show that this herbicide is classified as slightly toxic to the three species. The values of dissolved oxygen, pH and temperature recorded in the aquarium control and aquarium experimental of the three fish species have remained without significant variations during the tests, which reduces the possibility of death caused by sudden variations of these parameters during the 96 hours the experiment. The values of LC50 between different species of fish were observed, noting that the species O.niloticus, C. carpio and C. macropomum showed no expressive differences. The values of environmental risk of Roundup were calculated to obtain more stringent parameters in assessing the dangerousness of those on nontargets. The risk of environmental contamination by Roundup for the Nile tilapia, common carp, and tambaqui are low for the lowest application rate (1 L.ha-1) and depths (1.5 and 2.0 m). The dilution of 100%, the highest recommended dose (5 L.ha-1) and depths (1.5 and 2.0 m) the risk is moderate for the three species. The values of the Risk Ratio (QR) were greater than 0,1, indicating that the values of the CAE and LC50 are above acceptable levels and there is a need, this study, a refinement in ecotoxicological tests Advisors/Committee Members: Medeiros, Guilherme Fulgêncio de (advisor), CPF:03935531400 (advisor), http://lattes.cnpq.br/1731390914884781 (advisor), Martins, Pedro Carlos Cunha (advisor), CPF:46125639304 (advisor), http://lattes.cnpq.br/9303700581868330 (advisor).

Subjects/Keywords: Roundup; CL50; Tilápia do Nilo (Oreochromis niloticus); Carpacomum (Cyprinus carpio); Tambaqui (Colossoma macropomum); Risco de contaminação ambiental; Roundup; LC50; Nile Tilapia (Oreochromis niloticus), commun carp (Cyprinus carpio), tambaqui (Colossoma macropomum) Risk of environmental contamination

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APA (6th Edition):

Moura, E. E. S. d. (2009). Determinação da toxicidade aguda e caracterização de risco ambiental do herbicida Roundup (glifosato) sobre três espécies de peixes . (Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/12486

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Moura, Emerson Eduardo Silva de. “Determinação da toxicidade aguda e caracterização de risco ambiental do herbicida Roundup (glifosato) sobre três espécies de peixes .” 2009. Thesis, Universidade do Rio Grande do Norte. Accessed April 11, 2021. http://repositorio.ufrn.br/handle/123456789/12486.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Moura, Emerson Eduardo Silva de. “Determinação da toxicidade aguda e caracterização de risco ambiental do herbicida Roundup (glifosato) sobre três espécies de peixes .” 2009. Web. 11 Apr 2021.

Vancouver:

Moura EESd. Determinação da toxicidade aguda e caracterização de risco ambiental do herbicida Roundup (glifosato) sobre três espécies de peixes . [Internet] [Thesis]. Universidade do Rio Grande do Norte; 2009. [cited 2021 Apr 11]. Available from: http://repositorio.ufrn.br/handle/123456789/12486.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Moura EESd. Determinação da toxicidade aguda e caracterização de risco ambiental do herbicida Roundup (glifosato) sobre três espécies de peixes . [Thesis]. Universidade do Rio Grande do Norte; 2009. Available from: http://repositorio.ufrn.br/handle/123456789/12486

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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