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Effect of methyl parathion on the muscle and brain acetylcholinesterase activity of matrinxã (Brycon cephalus) Ciência Rural
Almeida,Luciana Cristina de; Aguiar,Lúcia Helena; Moraes,Gilberto.
Farming of the freshwater fish is emerging in Brazil and many species from the wild are promising. The teleost matrinxã (Brycon cephalus) holds several characteristics such as fast growth rate, high commercial value and adaptability to artificial raring conditions, which make it a promising species for commerce. The use of pesticides in aquatic environment is frequent in Brazil, and methyl parathion is very common in aquaculture. We have determined the enzymatic activity of acetyl cholinesterase in white muscle and brain of matrinxã exposed to 2ppm of environmental methyl parathion for 24 hours. There was 64% and 69% of acetyl cholinesterase inhibition in muscle and brain respectively. These activities were not recovered after 8 days from exposure to this...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acetylcholinesterase; Methyl parathion; Matrinxã; Toxicity.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782005000600029
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Gastrointestinal transit of extruded or pelletized diets in pacu fed distinct inclusion levels of lipid and carbohydrate PAB
Honorato,Claucia Aparecida; Almeida,Luciana Cristina de; Nunes,Cleujosí da Silva; Carrilho,Elma Neide Vasconcelos Martins; Moraes,Gilberto.
The objective of this work was to evaluate the effect of pelletized or extruded diets, with different levels of carbohydrate and lipid, on the gastrointestinal transit time (GITT) and its modulation in pacu (Piaractus mesopotamicus). One hundred and eighty pacu juveniles were fed with eight isonitrogenous diets containing two carbohydrate levels (40 and 50%) and two lipid levels (4 and 8%). Four diets were pelletized and four were extruded. Carbohydrate and lipid experimental levels caused no changes to the bolus transit time. However, the bolus permanence time was related to diet processing. Fish fed pelletized diets exhibited the highest gastrointestinal transit time. Regression analysis of bolus behavior for pelletized and extruded diets with 4% lipid...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Piaractus mesopotamicus; Carbohydrate; Lipid; Starch gelatinization; Viscosity..
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014001100829
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Intermittent sustained swimming in 'matrinxã' Brycon amazonicus (Bryconidae: Bryconinae): hematological and metabolic responses Neotropical Ichthyology
Fabrizzi,Fernando; Moraes,Gilberto; Hackbarth,Araceli; Almeida,Luciana Cristina de; Arbeláez-Rojas,Gustavo; Nunes,Cleujosí da Silva.
In fish, studies on a wide variety of physiological effects of exercise have been reported since a long time. It has been attributed special attention to some types of exercise, however, its application as a healthful practice in the rearing and welfare of farming fish is rising in last few years. In this particular, long-term intermittent sustained swimming (ISS) has been not yet explored. In this work, the freshwater fish Brycon amazonicus was submitted to (ISS) for 30 days at velocity of 1.0 body-length sec-1 for 12h interspaced by 12h under still water. Hematology and metabolism were evaluated. Exercised fish decreased 30% the erythrocyte number and hemoglobin was unvaried. The stores of liver glycogen and muscular triacylglycerol (TAG) were increased...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Adaptation; Exercise; Fish; Glycogen; Metabolism; Triacylglycerol.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000200425
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