This study evaluated the effect of enriched artemia nauplii with commercial probiotic for angelfish larvae determining growth perfomance,survival and modulation of the intestinal microbiota.Therefore,it experiment occ...This study evaluated the effect of enriched artemia nauplii with commercial probiotic for angelfish larvae determining growth perfomance,survival and modulation of the intestinal microbiota.Therefore,it experiment occurred in completely randomized design with five treatments(T1-0.0,T2-1.5,T3-3.0,T4-4.5 and T5-6.0g of commercial probiotic)and four replaces during 20 days.After larvaculture,post larvae passed by biometric procedures to determine productive performance and then microbiological analysis.Occurred reduction of total heterotrophic bacteria while increased lactic acid bacteria in the intestinal tract from the post larvae for treatments T3,T4 and T5.The commercial probiotic also increased the survival and performance as final weight,weight gain and specific growth rate.For these reasons,the use of 3g of commercial probiotic promotes greater performance and intestinal modulation for angelfish larvae.展开更多
Incorrect discard of oil used by fishing ship in the brazilian north region has become a common activity.Despite the possible hazard to the aquatic organisms,still missing scientific data about their toxicity.Thus,thi...Incorrect discard of oil used by fishing ship in the brazilian north region has become a common activity.Despite the possible hazard to the aquatic organisms,still missing scientific data about their toxicity.Thus,this study aimed to evaluate the stress and lethality caused by lubricant oil(FSAOLU)on fish Hyphessobrycon eques.Therefore,it was used six different concentration diluted in water(0,22,24,26,28,30 and 32%of oil)and three replaces during 96 hours.At the end or during the experiment(with dying fish),it was collected blood samples(cutting the caudal fin)to determine physiological changes.The FSAOLU showed mean lethal dose(LD50-96h)of 27.36%,classified as toxic causing alterations in glucose values from the 26%.The greater dilution of FSAOLU(32%)increased 115%in glucose values when compared to the control.Thus,lubricant oil when discarded in water,it present hazard to the aquatic organisms causing stress and mortality for fish being necessary adequate management to discard of this residue.展开更多
文摘This study evaluated the effect of enriched artemia nauplii with commercial probiotic for angelfish larvae determining growth perfomance,survival and modulation of the intestinal microbiota.Therefore,it experiment occurred in completely randomized design with five treatments(T1-0.0,T2-1.5,T3-3.0,T4-4.5 and T5-6.0g of commercial probiotic)and four replaces during 20 days.After larvaculture,post larvae passed by biometric procedures to determine productive performance and then microbiological analysis.Occurred reduction of total heterotrophic bacteria while increased lactic acid bacteria in the intestinal tract from the post larvae for treatments T3,T4 and T5.The commercial probiotic also increased the survival and performance as final weight,weight gain and specific growth rate.For these reasons,the use of 3g of commercial probiotic promotes greater performance and intestinal modulation for angelfish larvae.
文摘Incorrect discard of oil used by fishing ship in the brazilian north region has become a common activity.Despite the possible hazard to the aquatic organisms,still missing scientific data about their toxicity.Thus,this study aimed to evaluate the stress and lethality caused by lubricant oil(FSAOLU)on fish Hyphessobrycon eques.Therefore,it was used six different concentration diluted in water(0,22,24,26,28,30 and 32%of oil)and three replaces during 96 hours.At the end or during the experiment(with dying fish),it was collected blood samples(cutting the caudal fin)to determine physiological changes.The FSAOLU showed mean lethal dose(LD50-96h)of 27.36%,classified as toxic causing alterations in glucose values from the 26%.The greater dilution of FSAOLU(32%)increased 115%in glucose values when compared to the control.Thus,lubricant oil when discarded in water,it present hazard to the aquatic organisms causing stress and mortality for fish being necessary adequate management to discard of this residue.
