Acute toxicity of ammonia in Pacu fish (Piaractus mesopotamicus, Holmberg, 1887) at different temperatures levels

2013 ◽  
Vol 46 (3) ◽  
pp. 565-571 ◽  
Author(s):  
Edison Barbieri ◽  
Ana Cristina Vigliar Bondioli
Keyword(s):  
Acute Toxicity ◽  
Piaractus Mesopotamicus ◽  
Different Temperatures

scholarly journals TOXICIDADE AGUDA DO INSETICIDA PARATION METÍLICO E DO BIOPESTICIDA AZADIRACTINA DE FOLHAS DE NEEM (Azadirachta indica) PARA ALEVINO E JUVENIL DE PACU (Piaractus mesopotamicus)

2004 ◽  
Vol 14 ◽  
Author(s):  
CLAUDINEI CRUZ ◽  
JOAQUIM G. MACHADO-NETO ◽  
MANOEL LIMA DE MENEZES
Keyword(s):  
Body Weight ◽  
Acute Toxicity ◽  
Environmental Risk ◽  
Azadirachta Indica ◽  
Methyl Parathion ◽  
Juvenile Fish ◽  
Aquatic Environments ◽  
Piaractus Mesopotamicus ◽  
Neem Leaves

Os objetivos deste trabalho foram calcular a CL (I) 50-96h do inseticida organofosforado paration metílico e do biopesticida azadiractina para alevinos e juvenis de pacu ( P. mesopotamicus). Também pretendeu-se avaliar o efeito do peso corpóreo sobre a toxicidade aguda do paration metílico e do neem para o pacu, bem como classificar o risco ambiental do uso de paration metílico e do neem para o controle de parasitas e patógenos de pacu. Foram realizados dois experimentos, em condições laboratoriais, para a determinação da concentração letal (CL (I) 50-96h). A CL (I) 50-96h calculada do paration metílico foi de 3,97 mg/L para os alevinos e de 9,89 mg/L para os juvenis. Para a azadiractina foi de 1,20 mg/L para os alevinos e de 1,18 mg/L para os juvenis. As concentrações de 1,0 mg/L de paration metílico para os alevinos e de 7,5 mg/L para os juvenis e as de 0,29 e 0,59 mg/L de azadiractina não provocaram mortalidade nos animais expostos e podem ser utilizadas como referência em estudos de controle de parasitas em pacu . O paration metílico foi menos tóxico para os alevinos e para os juvenis de pacu do que a azadiractina, indicando a necessidade de cuidados com a utilização de extratos aquosos de neem no ambiente aquático. ACUTE TOXICITY OF THE INSECTICIDE METHYL PARATHION AND OF THE BIOPESTICIDE AZADIRACHTIN FROM NEEM LEAVES (Azadirachta indica) TO ALEVINE AND JUVENILE PACU (Piaractus mesopotamicus) Abstract The objectives of the present study were: to calculate the lethal concentration LC (I) 50-96 h of methyl parathion and of the biopesticide azadirachtin to alevine and juvenile pacu ( P. mesopotamicus). Also to determine the effect of body weight on acute toxicity of methyl parathion and of neem for pacu, as well as to classify the environmental risk of the methyl parathion and neem uses for the control of pacu parasites and pathogens. Two experiments were performed under laboratory conditions for the determination of the LC (I) 50-96 h. The LC (I) 50-96 h of methyl parathion was 3.97 mg/L for alevine and 9.89 mg/L for juvenile fish. The LC (I) 50-96 h of azadirachtin was 1.20 mg/L for alevine and 1.18 mg/L for juvenile pacu. Concentrations of 1.0 and 7.5 mg/L of methyl parathion and of 0.29 and 0.59 mg/L of azadirachtin for alevine and juvenile pacu, respectively, did not cause mortality in the exposed animals and can be used as references in studies on the control of parasites in pacu. Methyl parathion was less toxic to alevine and juvenile pacu than azadirachtin, indicating the need for careful utilization of aqueous neem extracts in aquatic environments.

Acute Toxicity of Arsenic under Different Temperatures and Salinity Conditions on the White Shrimp Litopenaeus vannamei

2013 ◽  
Vol 152 (3) ◽  
pp. 350-357 ◽  
Author(s):  
Jesús Alberto Valentino-Álvarez ◽  
Gabriel Núñez-Nogueira ◽  
Laura Fernández-Bringas
Keyword(s):  
Acute Toxicity ◽  
Litopenaeus Vannamei ◽  
White Shrimp ◽  
Different Temperatures

Secondary stress responses to hypoxia and re‐oxygenation at different temperatures in pacu ( Piaractus mesopotamicus ) juveniles

2020 ◽  
Vol 51 (11) ◽  
pp. 4471-4481
Author(s):  
Lilian F. Nitz ◽  
Lucas Pellegrin ◽  
Daniel S.B. Pinto ◽  
Lucas C. Maltez ◽  
Carlos E. Copatti ◽  
...  
Keyword(s):  
Stress Responses ◽  
Secondary Stress ◽  
Piaractus Mesopotamicus ◽  
Different Temperatures

scholarly journals Acute toxicity of commercial atrazine in Piaractus mesopotamicus: Histopathological, ultrastructural, molecular, and genotoxic evaluation

2017 ◽  
Vol 10 (9) ◽  
pp. 1008-1019 ◽  
Author(s):  
Paula Pereira de Paiva ◽  
Mariana Cruz Delcorso ◽  
Valquiria Aparecida Matheus ◽  
Sonia Claudia do Nascimento de Queiroz ◽  
Carla Beatriz Collares-Buzato ◽  
...  
Keyword(s):  
Acute Toxicity ◽  
Piaractus Mesopotamicus

scholarly journals Effects of Fe3+ on Acute Toxicity and Regeneration of Planarian (Dugesia japonica) at Different Temperatures

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Xue Ding ◽  
Linxia Song ◽  
Yahong Han ◽  
Yingbo Wang ◽  
Xiaowang Tang ◽  
...  
Keyword(s):  
Water Pollution ◽  
Acute Toxicity ◽  
Toxic Effects ◽  
Regeneration Rate ◽  
Planarian Regeneration ◽  
Suitable Temperature ◽  
Different Temperatures ◽  
Dugesia Japonica ◽  
The Difference ◽  
Head Regeneration

Objective. To investigate the effects of different concentrations of Fe3+ on the acute toxicity and regeneration of planarian at different temperatures. Method. The planarians were treated with 40 mg/l, 50 mg/l, 60 mg/l, and 70 mg/l Fe3+ solution and placed in 15°C, 20°C, and 25°C, respectively, to observe the mortality and the poisoning pattern of the planarian. In addition, the planarians were cut into three parts of head, trunk, and tail, then placed in Fe3+ solution at concentrations of 10 mg/l, 15 mg/l, 20 mg/l, and 30 mg/l, and placed in 15°C, 20°C, and 25°C respectively, and the regeneration rate of the planarian was investigated. Results. At the same temperature, in the concentration of Fe3+ from 40 mg/l to 70 mg/l, the mortality of the planarian increased with the increasing of the concentration of Fe3+; at the same concentration and different temperatures, the death speed of the planarian is the fastest at 20°C, the next at 25°C, and the lowest at 15°C, indicating that the toxic effect of Fe3+ can be accelerated at a suitable temperature of 20°C. At the same temperature, in the low concentration of Fe3+ from 10 mg/l to 30 mg/l, the regeneration rate of the planarian gradually decreased with the increasing of the concentration of Fe3+; at the same concentration and different temperature, the regeneration rate of planarian was faster at 20°C and 25°C, but the difference between 20°C and 25°C was small, and the slowest at 15°C, indicating that the low temperature significantly affects the planarian regeneration speed. The study also found the regeneration rates of the head, trunk, and tail of the planarian were different; the head regeneration was the fastest, the trunk was the second, and the tail was the slowest. Conclusion. Fe3+ had obvious toxic effects on the survival and regeneration of planarian; the planarian is sensitive to Fe3+ and may be used to detect Fe3+ water pollution; in addition, temperature can affect the toxic effects of Fe3+ and thus affect the survival and regeneration of the planarian. Therefore, the temperature should be taken into consideration when detecting water Fe3+ pollution.

Acute toxicity of ammonia in Meagre (Argyrosomus regiusAsso, 1801) at different temperatures

2015 ◽  
Vol 47 (11) ◽  
pp. 3593-3598 ◽  
Author(s):  
Mehmet Kir ◽  
Mustafa Topuz ◽  
Murat Can Sunar ◽  
Havva Topuz
Keyword(s):  
Acute Toxicity ◽  
Different Temperatures

scholarly journals Acute toxicity of non-ionized ammonia on tambacu (Colossoma macropomum x Piaractus mesopotamicus)

2020 ◽  
Vol 51 (3) ◽  
Author(s):  
Fabrízia da Silva Quaresma ◽  
Fernando Luís Batista dos Santos ◽  
Pedro Florêncio Ribeiro ◽  
Lorena Alves Leite ◽  
Alexandre Holanda Sampaio
Keyword(s):  
Acute Toxicity ◽  
Colossoma Macropomum ◽  
Piaractus Mesopotamicus
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