Browsing by Subject "Fishery"
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Item Study of Water Quality, Fish and Fishery of Mechi-River(Department of Zoology, 2008) Pokharel, Bishwa RajThe present study of "Study of Water Quality, Fish and Fishery of Mechi-River", was conducted from 16th December, 2006 A.D. to 15th June, 2007A.D. The study area was divided into station A, B and C. The water samples from each sampling sites were collected in the morning throughout the study period. The physical parameters such as temperature, depth, transparency, water color, nature of the day were performed on the field itself. The analysis of chemical parameters such as pH, hardness, DO, CO2, alkalinity were examined on the same day. The maximum DO 7.3ppm was observed on March, '07. The free CO2 fluctuated from 8 - 15.3ppm. The alkalinity was found between 55 - 110ppm with an average of 92.5ppm. The value of total hardness recorded during the study ranged from 25 - 37ppm with an average of 31ppm. The various types of fishing gears used by the local fisherman included cast net, chhanki, Ganj, Sola, line fishing, gill net, scoop net, dip net, basket trap, Ghorlong etc. Fishing activities in Bhadrapur is not a solely subsistence occupation which depended for its prosperity on Market conditions. Fisherman conducts their transaction with much haggling and employ complicated methods of finance and credit. A total of 32 species of fishes belonging to 23 genera were recorded during the study period. The use of traditional fish preservations were not able to keep the storing life of fish for a long time.Item Study on Impacty of Irrigation Dam on Fish and Fishery of Kesali River, Morang, Nepal.(Department of Zoology, 2008) Rai, ShaileshThe present work was conducted in Kesali River close to irrigation dam. The study was focused in the analysis of physicochemical parameters of water, biological studies like diversity and population of fishes. The different implements and techniques used in fishing in this area were also recorded. The basic objective of present study was to assess the impact of irrigational dam on fish diversity and population. Altogether 21 species of fishes was recorded in present study belonging to 15 genera, 10 families and under 5 orders. Fish composition and frequency distribution of fish catches revealed majority fishes belonged to Cyprinidae family and Puntius species as most dominant species followed by common species such as Barilius sp, Garra sp, Channa sp, and Colissa fasciatus. Amphipnous cuchia was least recorded and reported in this river. The sampling record showed fish diversity high in upstream of dam during November and February but high fish diversity was recorded in downstream of dam during May and August. The highest fish catch per unit hour was recorded in August and lowest in November. Both conventional and non-conventional fishing methods were noted to be used in and around the Kesali river area. The use of most of the fishing appliances were recorded seasonal; but some implements like cast net, chhanki net, hook and line were found to be used throughout the year. Fish diversity and population is declining day by day due to development work (damming), non conventional fishing methods, pollution and natural calamities like heavy flood and erosion. People living around Kesali Rive were found to be involved in fishing only as part-time fisherman, but fisherman from India were found to be fishing throughout the year.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.