论文部分内容阅读
凡是摸过鱼的人都能感觉到,鱼的体表特别润滑,这是因为鱼的体表有一种特殊的分泌物——粘液的缘故。粘液是鱼类抵抗病害入侵的第一道防线,水中的病原体,尤其是细菌,很难突破这道防线。粘液是由多糖类和蛋白质组成的一种胶体状的物质,其中含有大量的溶菌和杀菌的物质,还含有由鱼体内产生的特异性抗体,它既能限制细菌的运动,又可杀灭入侵的病原体,起到自我消毒防病之功效,在体表形成一道非常有效的天然屏障。此外,在鱼体的粘液皮肤上还有一个正常的微生物丛,组成一个特异的生态体系,能使病原体难以依附和生存。
Anyone who has touched the fish can feel the fish’s body surface is particularly lubricated, this is because the fish’s body surface has a special secretions - mucus reasons. Mucus is the first line of defense against the invasion of fish by disease, and pathogens in water, especially bacteria, have a hard time breaking through this line of defense. Mucilage is a colloidal substance composed of polysaccharides and proteins, which contains a large amount of bacteriolytic and bactericidal substances, and also contains specific antibodies produced by the fish, which not only can restrict the movement of bacteria, but also kill Invasion of the pathogen, play a self-disinfection disease prevention effect in the body surface to form a very effective natural barrier. In addition, there is a normal microflora in the mucus skin of the fish that forms a specific ecosystem that makes it difficult for pathogens to attach and survive.