I.D. Papanin Institute for Biology of Inland Waters RAS, PO Box 152742, Borok, Yaroslavl, Russia.
Fish Physiol Biochem. 2011 Sep;37(3):345-53. doi: 10.1007/s10695-010-9426-3. Epub 2010 Nov 17.
It is shown that amylolytic and proteolytic activity of the intestinal mucosa, the chyme and the intestinal flora in the fishes, zander Zander lucioperca (L.), perch Perca fluviatilis L., bream Abramis brama (L.) and roach Rutilus rutilus (L.), belonging according to their feeding habits to different ecological groups at the same pH values as well as in the pH range from 5.0 to 10.0 considerably varies. The glycosidase pH optimum of the mucosa and intestinal microbiota is 7.0, whereas that of the chyme varies from 6.0 (in roach) to 8.0 (in bream). pH optimum of the mucosa proteinases in all fish species is 10.0, whereas that of the chyme and the bacterial flora can be observed in all the range of pH values.
结果表明，根据饮食习惯属于不同生态类群的鱼类（欧白鲑 Zander lucioperca（L.）、河鲈 Perca fluviatilis L.、鲤鱼 Abramis brama（L.）和圆腹雅罗鱼 Rutilus rutilus（L.））的肠黏膜、食糜和肠道菌群的淀粉水解酶和蛋白水解酶活性在相同 pH 值以及 5.0 至 10.0 的 pH 范围内有很大差异。黏膜和肠道微生物群的糖苷酶 pH 最适值为 7.0，而食糜的 pH 最适值从 6.0（圆腹雅罗鱼）到 8.0（鲤鱼）不等。所有鱼类的黏膜蛋白酶的 pH 最适值均为 10.0，而食糜和细菌菌群的 pH 最适值可在所有 pH 值范围内观察到。
