Spatio-Timporal Variation in Fish Assemblage Structure of Upper Rapti River, Mid-Western Nepal
| dc.contributor.author | Sharma, Hiramani | |
| dc.date.accessioned | 2023-06-25T09:41:32Z | |
| dc.date.available | 2023-06-25T09:41:32Z | |
| dc.date.issued | 2019 | |
| dc.description.abstract | The spatial and temporal variations of fish assemblages in Nepalese rivers and streams is poorly known. The fish community and environmental factors of the Upper Rapti River were studied four times a year, spanning all seasons (summer, winter, autumn, and spring). The fish were agglomerated using a cast net with the assistance of local fishermen from three sample stations encompassing 15 kilometers. The current results indicate that the Upper Rapti River is habitat to 12 species representing 2 Orders, 4 Families, and 9 Genera. The most contributory fish species recorded from Upper Rapti River was Barilius bendelisis (18.34%) followed by Schizothorax plagiostomus (17.22%) and Schizothorax labiatus (15.31%). Kruskal-Wallis test was applied where p-value was observed 0.068 among seasons and 0.266 along stations so there was no significant difference in the abundance of fish among stations and seasons. Physical and chemical variables have a significant role in determining the condition of the fish community. Throughout a year, the mean Shannon-Weiner diversity index was 2.2 and species richness was maximum 2.2 during spring and least 1.6 during autumn. With a mean score of 0.9, species evenness was almost identical in all seasons. The RDA results showed that environmental elements such as pH, total hardness, free carbon dioxide, DO, and water temperature influence the fish community structure of the Upper Rapti River. The cluster analysis shows that the associations between fish assemblages and abundance of fishes. The research might contribute to the preservation of locally adapted fish in the Upper Rapti River as well as the advancement of information about the diversity of fish in Nepal. | en_US |
| dc.identifier.uri | https://hdl.handle.net/20.500.14540/18184 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Department of Zoology | en_US |
| dc.subject | Fish species | en_US |
| dc.subject | Environmental variation | en_US |
| dc.title | Spatio-Timporal Variation in Fish Assemblage Structure of Upper Rapti River, Mid-Western Nepal | en_US |
| dc.type | Thesis | en_US |
| local.academic.level | Masters | en_US |
| local.institute.title | Central Department of Zoology | en_US |