Browsing by Subject "Fish Diversity"
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Item Fish Diversity of Sapta Koshi River, Saptari, Nepal(Central Department of Zoology, 2017) Yadav, Shiv ShankarThe physio-chemical parameter of an aquatic environment exhibit influencing factor for the quantity of aquatic life. Present study (a ranging of 2.5 km) during the month of February and May 2015 in the Koshi River indicated a total account of 22 fishes species from 6 orders namely Anguilliformes (1.73%), Clupeiformes (1.73%), Cypriniformes (48.95%), Siluriformes (35.41%), Synbranchiformes (3.47%) and Perciformes (2.08%) of fish species out of 288 fish catch recorded 10 families and 17 genera. The most abundant family within catch was Cyprinidae. Aspidoperia morar, Clupisoma garua were the most abundant fishes in all the study sites during the month of May. Labeo rohita, Puntius sophore, Mystus tengra were the most abundant fishes in all the study sites during the month of February. Fishes belonged to different families like- Anguillidae (1.73%), Clupeidae (1.73%)), Cypinidae (46.52%), Cobitidae (2.43%), Bagridae (17.36%) , Schilbeidae (7.98%) , Clariidae ( 3.13%), Heteropneustidae (6.945) , Mastacembelidae (3.47%) and Channidae (2.08%).Here, occurrence of Cypriniformes - Labeo spp. Cirrhinus comprises the dominant group. One species belonging to Heteropneustidae family in the Koshi River during this investigation but Anguillabengalensis, Labeo dero, which were not reported from Koshi River. Number of fish species was recorded higher in stations I and III and lower in station II. The correlation between transparency and fish density was found negative at station I and positive at II and III. The transparency was change in the water depth and human activities. The study showed riverine environment undergone degradation due to various natural landslide, soil erosion and manmade activities like road construction alongside of the river bridge, construction, over fishing, illegal fishing, use of soap and detergent, stone extraction etcItem Species Diversity, Distribution and Status of Fishes In Tinau River, Nepal(Central Department of Zoology Institute of Science and Technology Tribhuvan University Kirtipur, Kathmandu, Nepal, 2015-09) Rijal, BikramA study was conducted to assess the fish diversity, distribution, abundance and status of fishes in Tinau River. The Tinau River supports for the habitat of many fresh water fishes of many types like carps, barbs, minnows, catfishes, eels etc. The study was focused on the diversity pattern of fishes and data was collected through selecting the sampling site and the field was visited on 4 different seasons. The study revealed that total 26 fish species have been collected from the Tinau River, belonging to 4 orders, 9 families and 19 genera. The most commonly observed fish species during the study period were Barillus bendelensis and Puntius sophore and Garra spp. Similarly, Tor tor and Brachydenio rerio were rare caught fishes. The physiochemical parameters were found to be related with the composition and distribution of the fished in Tinau River. Highest Shannon weiner diversity index was observed in station IV (1.14) and in the month of July (1.11). Similarly, the maximum richness was observed in station IV (6.63) and in the month of April (9.97). Evenness index was found to be higher in January (0.97) and in the station III (1.18). No significant difference in the diversity status was obtained during the investigation period rather it was a seasonal phenomenon in the composition of fish species.Item "Study on Fish Diversity and Fishery resources of The Tinau River"(Department of Zoology, 2007) Pokharel, ShambhuThe present study entitled-"Study on Fish Diversity and FisheryResources of the Tinau River" deals with the present status of fishdiversity, distribution pattern, socio-economic condition of fishermen,effect of dam on fisheries and fishing implements using around the Tinauriver. The present study reports a total of 32 fish species belonging tofour orders viz. Cypriniformes, Siluriformes, Perciformes andSynbranchiformes. They belong to 11 families and 24 genera. Fisheswere collected seasonally. Commonly found species inTinau river arePuntius sps.,Barilius sps.,Schistura sps. andLepidocephalus sps. Thephysicochemical parameters of river shows different habitats. The fishpopulation in the river is decreasing due to dam construction and illegalfishing. The socio-economic status of fisherman is very poor. About 65%of fisherman were illiterate, however they have intension to educate theirchildren. Both conventional as well as non-conventional fishingimplements were found to be used in and around the Tinau river.