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| Format: | Artículo científico |
| Language: | en |
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Universidad Autónoma de Baja California
2016
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| Online Access: | https://www.redalyc.org/articulo.oa?id=48044829002 |
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Table of Contents:
- Response of yellow catfish (Pelteobagrus fulvidraco) to different dietary concentrations of aflatoxin B1 and evaluation of an aflatoxin binder in offsetting its negative effects Xinxia Wang Yizhen Wang Yongjin Li Ming Huang Yang Gao Xianfeng Xue Haiwen Zhang Pedro Encarnação Gonçalo A Santos Rui A Gonçalves Ciencias de la Tierra Mycotoxins growth performance immunosu ppression aflatoxin B1 (AFB1 ) Aflatoxin B1 (AFB1), produced by Aspergillus flavus and Aspergillus parasiticus , is one of the major mycotoxins to affect animal health. AFB1 contaminati on of aquafeed is widespread, es pecially in countries with humid, tropical climates. The most a pplied method for protecting animals against af latoxicosis is the use of clay minerals. Growth performance, i mmunosuppressive effects (bacte ricidal activity, lysozyme activity, albumin/globul in ratio, alternative compleme nt pathway activity, and protein content), and pathology parame ters were used to evaluate the response of yellow catfish ( Pelteobagrus fulvidraco ) to increasing concentrations o f AFB1 and test the protective effect of dietary supplementation with a b entonite (dioctahedral montmori llonite) based AFB1 binder. Tri plicate groups of yellow catfish with an average weight of 2.0 ± 0.1 g were fed diets containing 0, 200, 500, and 1,000 g/kg of AFB1 alone, or diet s containing 0, 200, 500, and 1,000 g/kg of AFB1 along with 2 g/kg AFB1 binder, for 12 weeks. Resul ts showed that diets containing increasing amounts of AFB1 had a significantly lower ( P = 0.002) survival rate. There was a statistical significant re duction in weight gain, final body weight, and specific growth rate, and an increase in feed c onversion ratio (FCR) influenced by the levels of AFB1 in the diet ( P < 0.001 for all parameters), as well as increasing protection due to the presence of the binder ( P = 0.046, P = 0.014, P = 0.038, and P = 0.485, respectivel y). The immunosuppressive nature of AFB1 in yellow catfi sh diets was confirmed through ob servation of lower bac tericidal activity ( P = 0.001), lower lysozyme activity ( P = 0.006), reduced total protein ( P = 0.002), and enhanced a lbumin/globulin ratio ( P = 0.004). Fish fed diets contaminated with AFB1 and supplemented with the AFB1 binde r showed better improvement in FCR ( P = 0.019). These results indicate that AFB1 has a negative impa ct on yellow catfish grow th and survival rate. The AFB1 binder pro tected fish from the toxic effects of AFB1. 2016 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48044829002 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.1 Vol.42