Effect of pH on the proteinase activities in the intestine mucosa, chyme, and enteral microbiota in the piscivorous fish differing in their ecological traits

被引：0

作者：

Kuz’mina V.V. ^{[1
]}

Zolotareva G.V. ^{[2
]}

Sheptitskii V.A. ^{[2
]}

机构：

[1] Papanin Institute of the Biology of Inland Waters, Russian Academy of Sciences (IBIW), Borok, Yaroslavl oblast

[2] Shevchenko Transnistria State University (PSU), ul. 25 Oktyabrya 128, Tiraspol

来源：

Journal of Ichthyology | 2016年 / 56卷 / 1期

关键词：

burbot Lota lota and zander Sander lucioperca; chyme; enteral microbiota; intestine; mucosa; pike Esox lucius; piscivores; proteinases; Rybinsk Reservoir;

D O I：

10.1134/S0032945216010070

中图分类号：

学科分类号：

摘要：

The effect of pH on the activity of proteinases of intestine mucosa, chyme, and enteral microbiota was studied in three piscivorous fish species of the Rybinsk Reservoir differing in their ecological traits: pike Esox lucius, burbot Lota lota, and zander Sander lucioperca. In all fish species, studied pH of ten is optimal for the functioning of proteinases of intestine mucosa; in chyme proteinases, optimal pH values vary from six to ten. Optimal pH for functioning of proteinases of enteral microbiota is seven for zander and pike; pH of nine, for burbot. High activity of chyme and microbiota proteinases within the diapason of pH values of six to nine is a characteristic of burbot. Relative activity of proteinases of intestine mucosa in all fish species is not more than 15% of the maximal activity; that of chyme and enteral microbiota is lower than 40% in zander, close to 50% in burbot, and 80 and 50%, respectively, in pike. It is suggested that diversity of the patterns of pH-dependence of enteral microbiota proteinases relates to the specificity of microbiota in various ecological zones of the reservoir (littoral, sublittoral, and bathyal). © 2016, Pleiades Publishing, Ltd.

引用

页码：147 / 153

页数：6

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