Efeitos da exposição prolongada de aflatoxina B1 e fumonisina B1 em codornas: avaliação de parâmetros de desempenho e de qualidade dos ovos / Effects of prolonged intoxication of aflatoxin B1 and fumonisin B1 in laying Japanese quail: evaluation of productivity and egg quality

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

This study evaluated the individual and combined effects of aflatoxin B1 (AFB1) and fumonisin B1 (FB1) on egg quality and performance of laying Japanese quail (Coturnix coturnix japonica). Two hundred twenty-eight birds were purchased at 8 week of age and randomly distributed into 6 experimental groups and given rations containing AFB1 and FB1 at the following levels: (0 AFB1+0 FB1), (0 AFB1+10 mg/kg FB1), (50 µg/kg AFB1+0 FB1), (50 µg/kg AFB1+10 mg/kg FB1), (200 µg/kg AFB1+0 FB1), e (200 µg/kg AFB1+10 mg/kg FB1). The birds were fed for 140 days (5 28-day laying periods). Each treatment consisted of four replicates of twelve quail. Egg production and individual egg weight were checked daily. Feed consumption and feed utilization were determined weekly. Eggs laid in the last day of each 28-day laying period were collected and submitted to individual analysis for specific gravity, Haugh units and percent egg shell. Results showed that average egg weight at the end of the fifth cycle was significantly lower (p <0,05) for groups fed 10 mg FB1/kg, 50 µg/kg AFB1, 200 µg/kg AFB1 and also for the group fed 10 mg FB1/kg + 50 µg/kg AFB1. Average egg production significantly decreased (p <0,05) for groups fed 10 mg FB1/kg by the end of the third, fourth and fifth cycles. Feed consumption was significantly lower (p <0,05) for group exposed to 10 mg FB1/kg, by the end of fourth and fifth cycles, whereas birds fed 50 or 200 µg/kg AFB1 showed a significant decrease (p <0,05) on feed consumption, by the end of fifth cycle. Birds exposed to 10 mg FB1/kg + 50 µg/kg AFB1 also showed lower values (p <0,05) of feed consumption, by the end of first, second and fifth cycles. Feed utilization and Haugh units were not affected (p >0,05) by AFB1 and FB1. Average egg specific gravity was significantly lower (p <0,05) for group fed 10 mg FB1/kg + 200 µg/kg AFB1, by the end of fifth cycle. Percent egg shell was significantly lower (p <0,05) for group exposed to 10 mg FB1/kg, by the end of the first cycle, however, birds exposed to 200 µg/kg AFB1 and also to 10 mg/kg FB1 + 50 µg/kg AFB1, showed a significantly increase (p <0,05) of percent egg shell, by the of the first cycle. Percent egg shell was significantly higher (p <0,05) for group fed 10 mg/kg FB1 + 200 µg/kg AFB1 , by the end of fifth cycle. The results obtained in the present study showed that the prolonged administration of FB1 and AFB1, singly or combined at the levels checked, may cause economic losses to the quail egg producers.

ASSUNTO(S)

fumonisina b1 quail aflatoxin b1 micotoxinas eggs mycotoxin codornas fumonisin b1 ovos aflatoxina b1

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