Growth and hepatopancreas performances of gibel carp fed diets containing low levels of aflatoxin B₁
2010
HAN, D. | XIE, S. | ZHU, X. | Yang, Y. | GUO, Z.
The effects of aflatoxin B₁ (AFB₁) on growth, physiological responses and histological changes were investigated in juvenile gibel carp (Carassius auratus gibelio). Triplicate groups of gibel carp (3.53 ± 0.02 g) were fed seven semipurified diets (Diet 1 to 7) containing 3.20, 5.37, 7.08, 9.55, 12.70, 17.90 and 28.60 μg AFB₁ kg⁻¹ diet for 3 months. The results showed fish weight gain fed Diet 6 was 112.6% of that of control group (Diet 1) after 3 months, but there was no significant difference of weight gain between fish fed Diet 7 and the control group. Alanine aminotransferase (ALT) of fish hepatopancreas fed Diet 7 was significantly higher than the control group (P < 0.05), but no significant difference was observed in ALT activities of the fish fed with more than 10 μg AFB₁ kg⁻¹ (Diet 4, 5, 6 and 7). No significant histological lesions were identified between the control and increasing AFB₁ treatments. AFB₁ accumulated in hepatopancreas was logarithmically related to the dietary AFB₁ levels, and AFB₁ also accumulated in muscles and ovaries of gibel carp fed Diet 3 to Diet 7. The present results indicated that fish fed with more than 10 μg AFB₁ kg⁻¹ diet showed impaired physiological responses and more AFB₁ residue of muscles and ovaries above the safety limitation of European Union.
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