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Seasonal Dynamics of Feeding Habits of a Cyprinid Fish, Saurogobio dabryi in the Downstream of the Jialing River, China

Seasonal Dynamics of Feeding Habits of a Cyprinid Fish, Saurogobio dabryi in the Downstream of the Jialing River, China

J. Ma1, F.B. Zhang1,2, J. Li1, Z.Y. Lv1, C. Zhang1, L. Mao1 and Y. Zeng1*

1College of Life Science, Southwest Branch of the National Freshwater Fishery Engineering Technology Research Center, China West Normal University, Nanchong 637000, China
2College of Environmental Science and Engineering, China West Normal University, Nanchong 637009, China
 
* Corresponding author: zengyu@cwnu.edu.cn

Fig. 1.

Sampling site of S.dabryi in the lower reach of the Jialing River.

Fig. 2.

Mean gut fullness index and percentage of empty gut of S. dabryi in each season (vertical bars indicate S.E.).

Fig. 3.

Cumulative prey curves of S. dabryi.

Fig. 4.

Dendrogram of cluster analysis on dietary composition of S. dabryi.

Fig. 5.

Feeding strategy of Saurogobio dabryi (A) Amundsen graph, black dot (•) represents prey category. a: Other; b: Bacillariophyta; c: Cyanophtya; d: Chlorophyta; e: Aquatic insect; f: Oligochaeta; g: Polychaeta; h: Rotaria; i: Crustacea; j: Sarcodina; (B) Explanatory diagram for the interpretation of feeding strategy and prey importance; BPC and WPC represent between-phenotype component and within-phenotype component, respectively.

Table II.

Food composition of S. dabryi in each season from the lower reaches of Jialing River.

Notes: %F means occurrence percentage, %N means numerical percentage, % W means weight percentage, %IRI means percent index of relative importance, “-” means less than 0.01.

Pakistan Journal of Zoology

April

Pakistan J. Zool., Vol. 56, Iss. 2, pp. 503-1000

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