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Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:27:22Z No. of bitstreams: 0Bitstream added on 2014-05-27T14:37:03Z : No. of bitstreams: 1 2-s2.0-84875100557.pdf: 207766 bytes, checksum: 6ba24f0e07d4ed1e77ba6b48158a5d5e (MD5) Made available in DSpace on 2014-05-27T11:27:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-12-01 This trial was conducted in order to determine the 50% lethal concentration (LC (I) 50-96h) of the aqueous extract of dried leaves of Terminalia catappa, a plant with antifungal, antibacterial and antiparasitic activity. Due to the increasing use of herbal medicines in aquaculture, its use is an option for controlling diseases in fish. Toxicity tests are important before recommending any treatment, since some products have therapeutic concentration close to lethal. To conduct the study used 135 fish species Guarus (Phalloceros caudimaculatus), exposed to increasing concentrations of: 0.0, 50.0, 100.0, 150.0, 200.0, 250.0, 300.0 mL of stock solution per liter of water. The results were calculated by the method Trimmed Spearman Karbo, demonstrating that the 50% lethal concentration (LC (I) 50-96h) estimated was 208.52 mL / L, with lower limit of 187.79 mL / L and higher 231.54 mL / L. Observed changes in behavior of the test organisms at concentrations above 250 mL / L decrease in the levels of dissolved oxygen and pH. Concentrations below 250 mL /L result in mortality rate near zero, so the aqueous extract shown low toxicity. UNESP Jaboticabal UENP Bandeirantes UNESP Jaboticabal

Made available in DSpace on 2022-04-29T00:13:27Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-08-22 The oxytetracyline (OTC) and florfenicol (FLO) are the most used antibiotics for bacterial disease control in fish. The aims are: estimating the lethal concentration 50% initial (LC(I)50;48h) of OTC (Terramicina ®) and FLO (Aquaflor ®) for pacu (Piaractus mesopotamicus); classifying OTC and FLO according to the acute toxicity and the risk of environmental intoxication; and assessing OTC and FLO dilution effect in water quality variables. Fish were acclimatized for 10 days in a bioassay room at 27 ± 2 °C. Then nine animals (three each concentration) were exposed to 7.0; 7.5; 8.0 or 8.5 mg L -1 of OTC or to 600.0; 700.0; 800.0; 900.0 and 1000.0 mg L -1 of FLO and a control treatment. The water quality variables recorded daily were: pH, temperature, electric conductivity, and dissolved oxygen. OTC and FLO were classified according to acute toxicity and environmental risk. The estimated OTC LC(I)50;48h for pacu is 7.6 mg L -1 and the estimated FLO is > 1000 mg L -1. OTC reduced the dissolved oxygen concentration, and it was considered moderately toxic, causing risk of environmental intoxication to pacu. FLO is not toxic; it does not cause risk of environmental intoxication to pacu and does not change water quality variables. UNESP Aquaculture Centre (Centro de Aquicultura da UNESP - CAUNESP), Via de acesso Paulo Donato Castellane s/n, CEP: 14.884-900, Jaboticabal, São Paulo University Federal of São Carlos (UFSCar), São Carlos Campus, São Paulo College of Agricultural and Veterinary Sciences at Unesp, Jaboticabal - São Paulo Ecotoxicology and Occupational Health Laboratory Laboratório de Ecotoxicologia e Saúde Ocupacional) College of Agricultural and Veterinary Sciences at Unesp, Jaboticabal - São Paulo UNESP Aquaculture Centre (Centro de Aquicultura da UNESP - CAUNESP), Via de acesso Paulo Donato Castellane s/n, CEP: 14.884-900, Jaboticabal, São Paulo College of Agricultural and Veterinary Sciences at Unesp, Jaboticabal - São Paulo Ecotoxicology and Occupational Health Laboratory Laboratório de Ecotoxicologia e Saúde Ocupacional) College of Agricultural and Veterinary Sciences at Unesp, Jaboticabal - São Paulo

Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:24:49Z No. of bitstreams: 0Bitstream added on 2014-05-27T14:41:28Z : No. of bitstreams: 1 2-s2.0-77957792637.pdf: 522919 bytes, checksum: 92f61e559170910556112167cb349c5b (MD5) Made available in DSpace on 2014-05-27T11:24:49Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-10-15 Aquatic macrophytes are important components of aquatic ecosystems, but these plants have become a problem due to their occurrence in different regions. Some studies aimed to demonstrate the effectiveness of herbicides to control these macrophytes; however, few studies report the possible ecotoxicological effects. The objective of this study was to estimate the acute toxicity (LC (I)50;96h) and assess water quality variables for glyphosate in the Rodeo® formulation, Aterbane® BR surfactant and mixtures of glyphosate + 0.5% and 1.0% of surfactant, for the guaru fish (Phallocerus caudimaculatus). The guaru was exposed to increasing concentrations of glyphosate and a mixture of glyphosate + 0.5 and 1.0% of surfactant. The mixture of glyphosate and glyphosate + 0.5 and 1.0% of surfactant showed (LC (I)50;96h) > 975.0 mg L -1. For the surfactant, the rate was 5.81 mg L -1. The glyphosate and mixtures of glyphosate + 0.5% and 1.0% of surfactant caused a decrease in pH and dissolved oxygen and increased the electrical conductivity of water. Glyphosate in the Rodeo® formulation and the mixtures with surfactant Aterbane® BR can be classified as practically nontoxic, whereas surfactant Aterbane® BR can be considered as moderately toxic to guaru. Universidade Estadual de Paulista, Via de acesso Paulo Donato Castellane, s/n, 14884-900, São Paulo, São Paulo Universidade Estadual de Paulista, Via de acesso Paulo Donato Castellane, s/n, 14884-900, São Paulo, São Paulo