Browsing by Subject "Fishery resources"
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Item Fish Diversity and Fishery Resources of Ranikhola, Sikkim, India(Central Department of Zoology, 2011) Sharma, PrakashThe present study entitled” Fish Diversity and “Fishery Resources of Rani khola , Sikkim India" deals with the distribution, diversity and frequency occurrence of fish and invertebrates in Rani khola. The study also attempts to unveil the water quality of Rani khola, present socio- economic status of the fishermen living in the vicinity of Rani khola and existing fishing practices in Rani khola. Altogether eight species of fish fauna under two orders, two families, two genera, twelve species of invertebrates under three phyla, five classes and twelve orders were collected. The most common and dominant species of fish recorded was Schizothoraichthys progastus with the highest frequency occurrence of 23.41 %. All the invertebrates recorded during the field visits were found uniformly distributed where as the distribution of fishes remained mid range migratory as well as residential. The physico-chemical parameters of water were found very ideal providing a suitable environment for all the aquatic fauna. The water temperature ranges from 6.3 to 160C. Other parameters such as dissolved oxygen were found very optimum with an average value of 9.7 mg/l and free carbon dioxide were found with an average value of 3.15mg/l.No published literature available on fish diversity of Rani khola. The socio-economic condition of the fishermen living in the vicinity of Rani khola were found quite poor and 40% of them were totally illiterate. They were known to use the various types of conventional as well as non conventional fishing methods like netting, using, basket cage, rod and line, snare loops, blasting, poisoning, grabing. The riverine environment of the Rani khola is degrading rapidly due to both natural and manmade causes leading to sharp declination in diversity and fish population. The major problems of this river are sand and stone mining over exploitations of fish with illegal fishing practices, soil erosion and unusual floodingItem Fish diversity and fishery resources of the Koshi river at KTWR, Nepal(Department of Zoology, 2011) Saud, SindhuThe present study deals with "Fish Diversity and Fishery Resources of the Koshi River, KTWR area.” The Koshi River flows through Koshi Tappu Wildlife Reserve, in eastern Nepal and famous for wild buffalo and bird sanctuary. This study provides information on the present status of fish diversity, fish distribution pattern, behavioral aspects of some important fishes and also the socio-economic condition of fishermen inhabiting around the Koshi River. The research was done with the help of fishes collected by local fishermen and hiring them as well. Cast nets and other local nets were used for the purpose. The socio-economic conditions of the fishermen were observed by interviewing local fishermen. The Koshi River shows more diversified fish species. Sixty-one species of fish belonging to 7 order, 20 families and 41 genera were collected from the Koshi River system. The most common fish species in the Koshi River were from Cyprinidae family and Barilius. The physico-chemical parameters show that the water in Koshi River is still good in condition for fishes but may get polluted with the increase of population around the Koshi River just outside of KTWR area. The socio-economic status of fishermen is poor due to illiteracy, insufficient agricultural land and unemployment. It has been observed that the fish population is deteriorating and decreasing rate day by day due to various factors such as dynamiting, poisoning, killing of brood fishes during spawning season and also by heavy flooding and erosion. Because of low catches and difficulties in livelihood some fishermen seek alternative work. Some fishermen are engaged with private fishery in ponds. The study shows that the fishermen as well as local villagers should be provided with some fishery education and other vocational training to prevent the decreasing rate of fishes in Koshi River.