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- W2389025947 abstract "In this study,two acute toxicity experiments(including touching test and oral test) were conducted on GIFT tilapia(Oreochromis niloticus) to assess the safety of urea-formaldehyde in fish.In touching test,tilapias(3.6 g) were exposed to 0,923,1 200,1 560,2 028 and 2 636 mg/L urea-formaldehyde solution for 96 h,the mortality rate of the tilapias were calculated after 96 h;In oral test,the effects of urea-formaldehyde in feeds on the feed intake,growth performance,haematological parameters of tilapia were investigated.The concentrations of urea-formaldehyde in experimental diets were 0,500,2 000,5 000 and 10 000 mg/kg respectively.Each diet was fed to triplicate groups of the experimental fish,with the initial body weight of tilapia being 55.00±0.05 g.Fish were reared for 21 d.The results showed that the LC50 for 24 h of tilapia in touching test was 2 414.2 mg/L,and the confidence limitation of LC5095% was 2 254.1-2 585.7 mg/L.In oral test,the feed intake,final body weight and specific growth rate were significantly decreased in 5 000 and 10 000 mg/kg urea-formaldehyde treatments(p0.05),and there was no significant difference in survival rate and feed conversion rate among all treatments.The serum alkaline phosphatase(ALP) and cholesterol concentration in 10 000 mg/kg urea-formaldehyde treatment were significantly lower than that in the control group(p0.05).The maximum NOAEL(no-observed-adverse-effect level) of urea-formaldehyde in tilapias in 21 days was found to be 13.2 mg/(kg·w·d)." @default.
- W2389025947 created "2016-06-24" @default.
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- W2389025947 date "2011-01-01" @default.
- W2389025947 modified "2023-09-23" @default.
- W2389025947 title "Acute toxicity of urea-formaldehyde on GIFT tilapia(Oreochromis niloticus)" @default.
- W2389025947 hasPublicationYear "2011" @default.
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