Data/hora: 06/06/2024 07:20:35

Provedor de dados: 	3	
País: 	Brazil	
Título: 	Acute toxicity of pyrazosulfuron-ethyl and permethrin to juvenile Litopenaeus vannamei - doi: 10.4025/actascibiolsci.v33i1.6974

Acute toxicity of pyrazosulfuron-ethyl and permethrin to juvenile Litopenaeus vannamei - doi: 10.4025/actascibiolsci.v33i1.6974	
Autores: 	Mello, Giovanni Lemos de; EPAGRI; Amaral Júnior, Hilton; Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina - Epagri; Garcia, Silvano; Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina - Epagri; Vinatea, Luis; UFSC.	
Data: 	2011-02-14	
Ano: 	2011	
Palavras-chave: 	Toxicology; Pesticides; Shrimp culture; Litopenaeus vannamei Toxicology; Pesticides; Shrimp culture; Litopenaeus vannamei.	
Resumo: 	The objective of this study was to determine the LC50 (96h) of two pesticides: Sirius&amp;reg; 250 SC herbicide of the pyrazosulfuron-ethyl group, and Talcord&amp;reg; insecticide of the permethrin group, on juvenile Litopenaeus vannamei. Shrimp total hemocyte count (THC) was also determined as an indication of physiological alterations caused by the pesticides. Juvenile shrimp (5.0 &amp;plusmn; 0.5 g) were exposed to the following concentrations: 0, 0.1, 1.0, 10, 100 and 1000 &amp;micro;g L-1 Sirius&amp;reg; 250 SC; and 0, 0.001, 0.01, 0.1, 1.0 and 10 &amp;micro;g L-1 Talcord&amp;reg;. The Talcord&amp;reg; LC50 (96h) was of 0.00933 &amp;micro;g L-1 or 9.33 ng L-1. There were no significant changes in the THC between control and test groups. No Sirius&amp;reg; 250 SC concentrations tested killed more than 50% of the shrimp; therefore, the herbicide was considered not toxic to the juveniles. However, the THC showed significant differences between the control and test groups, suggesting sublethal effects to L. vannamei juveniles. According to the results, the insecticide Talcord&amp;reg; is highly lethal for L. vannamei and the herbicide Sirius&amp;reg; 250 SC was not lethal in the concentrations tested but showed sublethal effects as lower THC. The results demonstrate the risks involved in farming  L. vannamei shrimp near rice cultures where these pesticides are routinely used.	
Idioma: 	Português	
Identificador: 	http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/6974

10.4025/actascibiolsci.v33i1.6974	
Editor: 	Universidade Estadual De Maringá	
Relação: 	http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/downloadSuppFile/6974/22465

http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/downloadSuppFile/6974/29726	
Formato: 	application/pdf

application/pdf	
Fonte: 	Acta Scientiarum. Biological Sciences; v. 33, n. 1 (2011); 1-6

Acta Scientiarum. Biological Sciences; v. 33, n. 1 (2011); 1-6	
Fonte: 	DECLARATION OF ORIGINALITY AND CESSATION OF COPYRIGHTI Declare that current article is original and has not been submitted for publication, in part or in whole, to any other national or international journal. I also declare that once published in the Acta Scientiarum. Biological Sciences, a publication of the Universidade Estadual de Maringá, it will not be submitted by me or by any co-author to any other scientific communication mean. In my name and in the name of co-authors, I shall cede the copyright of the above mentioned article to the Universidade Estadual de Maringá and I declare that I know that the non-observance of this norm may make me liable for the penalties contemplated in the Law for the Protection of Authors’ Rights (Act 9609 of the 19th February 1998).

DECLARAÇÃO DE ORIGINALIDADE E CESSÃO DE DIREITOS AUTORAIS  Declaro que o presente artigo é original, não tendo sido submetido à publicação em qualquer outro periódico nacional ou internacional, quer seja em parte ou em sua totalidade. Declaro, ainda, que uma vez publicado na revista Acta Scientiarum. Biological Sciences, editada pela Universidade Estadual de Maringá, o mesmo jamais será submetido por mim ou por qualquer um dos demais co-autores a qualquer outro meio de divulgação científica. Através deste instrumento, em meu nome e em nome dos demais co-autores, porventura existentes, cedo os direitos autorais do referido artigo à Universidade Estadual de Maringá e declaro estar ciente de que a não observância deste compromisso submeterá o infrator a sanções e penas previstas na Lei de Proteção de Direitos Autorias (Nº9609, de 19/02/98).