Size-selective filtration and taxon-specific digestion of plankton algae by silver carp (Hypophthalmichthys molitrix Val)

被引：69

作者：

Voros, L ^{[1
]}

Oldal, I ^{[1
]}

Presing, M ^{[1
]}

VonBalogh, K ^{[1
]}

机构：

[1] S TRANSDANUBIAN ENVIRONM INSPECTORATE,LAB ENVIRONM PROTECT,H-7615 PECS,HUNGARY

来源：

HYDROBIOLOGIA | 1997年 / 342卷 / 0期

关键词：

silver carp; phytoplankton; size selective filtration; taxon specific digestion;

D O I：

10.1023/A:1017039423485

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

A comparison of the composition of natural phytoplankton communities with the gut content of silver carp (Hypophthalmichthys molitrix) showed that this fish species can not take up algae smaller than 10 mu m. The species composition of algal assemblages in the gut content of the silver carp usually differs significantly from the composition of the > 10 mu m size fraction of the natural phytoplankton assemblages. This difference is mainly a result of the taxon selective digestion of silver carp. In vitro experiments with digestive enzymes of this species resulted in a very fast (1-2 minutes) disintegration of non-mucilaginous cyanobacteria. The digestion of diatoms and cryptophytes was also effective, but mucilaginous cyanobacteria and green algae (Chlorococcales) proved practically indigestible.

引用

页码：223 / 228

页数：6

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