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Fishes in the mainstream of the Yellow River: assemblage characteristics and historical changes

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Author(s): Huijun Ru | Haijun Wang | Weihua Zhao | Yaqiang Shen | Yong Wang | Xiaoke Zhang

Journal: Biodiversity Science
ISSN 1005-0094

Volume: 18;
Issue: 2;
Start page: 169;
Date: 2010;

Keywords: the Yellow River | fish assemblage | species diversity | ecological guilds

ABSTRACT
To explore the status of fish assemblage characteristics and historical changes, investigations on fish assemblage were carried out in the mainstream of the Yellow River in spring (May–June) and autumn (September–November) of 2008. A total of 54 fish species were collected, belonging to 13 families and 7 orders, among which 4 species were endemic to the river basin. Cypriniformes were dominant, accounting for 68.5% of the total species captured. Fish assemblages in the upper section were relative simple, while those in the middle and lower sections were much more complex. Species richness increased from upper to lower sections. The ecological guilds of fishes in the Yellow River showed great variety in migration, feeding, spawning and inhabit. Although the catch composition was different from section to section, the dominant groups were all small fishes, including Pelteobagrus spp., Silurus asotus, Carassius auratus, Gobioninae and so on and fishes showed miniaturization significantly. Compared with historical data, fish abundance and diversity in our samples were dramatically lower and the loss of endemic species was severe. Over exploitation of water resources, construction of hydraulic engineering infrastructure, water pollution and the unreasonable utilization of resource are potential underlying reasons for observed shifts in the fish assemblages.

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Tangokurs Rapperswil-Jona

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