On some feeding features of the Kura barb (Barbus lacerta) in Bibi-Sayyedan River of Semirom, Isfahan

Document Type : Research Paper

Authors

1 Former M.Sc. Student, Department of Fisheries, Faculty of Natural Resources, Isfahan University of Technology, Isfahan, Iran

2 Associate Professor, Department of Fisheries, Faculty of Natural Resources, Isfahan University of Technology, Isfahan, Iran

Abstract

This study was aimed to investigate some feeding characteristics of Kura barb (Barbus lacerta) from Bibi-Sayydan River of Semirom, Isfahan. For this purpose, during August 2010 to July 2011, some 445 specimens of the Kura barb fish were caught using a seine net and a cast net and transferred to the Fisheries laboratory on ice for further examinations. The results showed that the Condition Factor (CF) for fish sampled during some different months were significant different from each other (P<0.05). The mean relative length of gut (RLG) was 0.967±0.007 for all fish during the year. Also, comparison of this index in different length classes revealed significant differences among them (P<0.05). Comparison of the Vacuity Index (VI) in some months and between the females and males showed significant differences among them (P<0.05). Also, comparison of mean Gastrosomatic Indix (GI) in females and in all fish during the study period showed no significant differences among them (P>0.05), but it was significantly difference in males during this period (P<0.05). In conclusion, this fish could be classified in the relative gluttonous group with an omnivory habit biased towards carnivory (mostly feeding on aquatic insects) and with a continuous feeding strategy throughout the year.

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References

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