Introduction: Having a proper understanding of the native fish population in each region in order to allow managerial and
commercial exploitation seems necessary. Naturally, due to ecological and climatic impacts that occur in each region, human impacts
affected fish biomass; therefore it is necessary to conduct periodical studies in this respect in each region so that by identifying their
impacts on dominant majority, new habitat, numbers of possible population, etc., new strategies are adopted. Because of having
understanding of native fish populations of this region during the drought and water shortage, this study was conducted and the
purpose of the study was to identify and investigate population diversity of Cyprindae in Parishan Lake watershed in Kazeroon
Methodology: Sampling was done from Parishan Lake watershed in Kazeroon country. Sixty one fish were caught from Parishan
Lake, 35 ones from Jamshidi spring, and 43 ones from Gale-Narenji spring by hand net, fixed net, fish hook and fishing basket; and
were transmitted to Islamic Azad University’s laboratory in order to identify and do biometric operations.
Then samples were grouped using SPSS software. First, grouping was done in male and female members of population and then
among populations. In the second stage, two factors that have the greatest role in diversity were calculated then their classifying graph
was drawn by Factor Analysis. For detecting significant differences between populations, males and females in separate groups,
ANOVA was used.
Results: results show that there are significant differences between the groups. According to results above and the data collected, it
can be said that currently there are 9 species of fish in Parishan Lake. Frequency of Cyprinion macrostomus was 22.14%, Liza
17.85%, Smoke 12.14%, Gambusia and Cyprinus carpio 9.28%, Scallop 7.85%, Barroisi 7.14%, Willow Leaf 5.71%, and Barbus
Conclusion: According to the researches done it is thought that native fish species, including Barbus grypus are likely extincting.