大家都不信任家养的食品,觉得可能有污染。野生的价格越来越高,可是野生的也不一定安全。你看这个报道。 【千岛湖的野生鱼汞含量超标】千岛湖的鱼是浙江人的最爱,也是各地餐馆吸引食客的招牌。研究发现,因环境污染和汞的水库集聚效应,多个鱼种的总汞含量持续增加,已超出国家标准(0.3 毫克/千克干重)和世卫的建议标准。超标最严重的鱼种是鲈鱼和鲶鱼,分别超6倍和4倍。链接 http://www.ncbi.nlm.nih.gov/pubmed/21713402 Arch Environ Contam Toxicol. 2012 Feb;62(2):323-32. Epub 2011 Jun 29. Freshwater fish-consumption relations with total hair mercury and selenium among women in eastern China. Fang T , Aronson KJ , Campbell LM . Source School of Environmental Studies, Queen's University, Kingston, ON, K7L 3N6, Canada. Abstract Wild fish from Qiandao Hu, a reservoir in the Zhejiang Province in eastern China, have increased mercury (Hg) concentrations exceeding the World Health Organization's (WHO) recommended guidelines. Due to the importance of freshwater biota in the local cuisine, dietary exposure to increased neurotoxic Hg is a concern in this region. An environmental hair-marker study was undertaken coincident with a cross-sectional epidemiologic study with 50 women age 17-46 years living in a Qiandao Hu fishing village. Diet, occupation, and other possible sources of Hg were recorded by way of questionnaires. Total mercury (THg) and selenium (Se) concentrations were measured in human hair samples and in important market fish species. Fish THg and Se concentrations were increased, with some fish concentrations 200 ng/g THg and 500 ng/g Se (wet weight ). However, the average hair THg was low at 0.76 ± 0.51 μg/g dry weight, lower than the WHO's no observable-adverse effect level (50 μg/g), whereas the average hair Se was 1.0 μg/g. Hair THg concentration was positively associated with the average mass of fish consumed weekly, indicating that fish consumption is the main contributor to hair THg in this geographic area. The age-related hair THg trend was not linear but instead demonstrated a rapid increase in THg before age 25 years, followed by consistent concentrations in all ages after age 25 years. There was a positive correlation (p 0.001) between molar Se and Hg in the hair samples, suggesting a possible antagonistic relation. This is the first study examining the relation between dietary Hg exposure and hair THg in an eastern China community where freshwater fish, as opposed to marine fish, dominates the cuisine. 我觉得,食品还是应该优先选择家养,生长期短的。这样即使有一些有害物质的积累,含量也是比较低的。不要盲目相信野生的好。现在的污染物是无处不在的。