Browsing by Subject "Physical parameters"
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Item Diversity and Distribution of Bumblebees in Gorkha Region of Chitwan Annapurna Landscape (CHAL), Nepal(Department of Zoology, 2020) Pandey, AnjeelaThis study was conducted in the Gorkha region of Chitwan Annapurna Landscape (CHAL), Nepal to explore the diversity and distribution of bumblebees. The fieldwork was carried from May to September 2019 across the altitudinal gradient by following an accessible walking trail. Bumblebee specimens were collected by using sweeping nets. Meanwhile, the physical variables such as altitude, temperature, and humidity were also noted. Host plants of collected bumblebees were also recorded. This study documented 12 Bombus species belonging to 8 subgenera. B. haemorrhoidalis was the most abundant species representing 30% of total species while B. pressus was the lowest abundant species representing 1% of the total species. The highest diversity of bumblebees was found in grassland (H=1.9585) while the lowest in the home garden (H=1.06086). Species richness of bumblebees was found to be positively correlated with altitude and humidity while negatively correlated with temperature. Similarly, bumblebees show significant effect (p=0.00000225) in preferences with the host plant's family and color of the host plant with significant effect (p=0.00124). This study has indicated that the diversity and distribution of bumblebees are mainly affected by physical parameters, habitat type and families, and color of the host plant.Item Study on the Fish and Fishery Resources of the Rapti River(Department of Zoology, 2006) Paudel, SharadaThe present study deals with the status ,distribution pattern of fish and socioeconomic condition of fishermen of the Rapti River.A total of 59 species belonging to 38 genera,19 families and 7 orders.Among them 48 species were collected from station I(Manahari),51 species from station II(Sauraha) and 53 species from station III(Jagatpur). The most common species are Cyprinids.The highest estimated catch was recorded in June and lowest in January. Thephysico-chemical and biological parameters have been studied in relation tothe distribution, abundance and frequency occurrence of ichthyofauna in Rapti River. Water quality analysis of Rapti river revealed that dissolved oxygen was of the optimum level.The river is providing with runs,pools and riffles showing the different fish habitats. The fish population in the river isdecreasing due to different human activities and natural calamities such as heavy flooding and erosion. This investigation also includes the socio-economic status of fishermen,which is found to be very poor.The study showed that about 105 fisherman families inhabiting around Rapti River are very poor and about 95% of the mare illiterate.