Browsing by Subject "Fish diversity"
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Item Correlations between fish assemblage structure and environmental variables in the Lohore River of Dailekh, Western Nepal(Department of Zoology, 2021) Shrestha, Sushil KumarAvailable with full textItem Diversity and Distribution of Fish in Andhi Khola, Syangja District, Nepal(Department of Zoology, 2020) Bhurtel, BishnuSeasonal changes in the species composition, number and abundance of fish species in Andhi Khola were investigated from September 2018 to May 2019. This study also addresses the relationship between fish and environmental variables from the Andhi Khola. Out of 907 individual fish identified, represented a total of 15 different species belonging in four order 11 genera and six families were caught. Highest number was counted for Barilius barila (320) and lowest was Heteropneustus fossilius (2 individual) which are 35.28% and 0.22% of total individual respectively. Along the longitudinal gradient from headwater to downstream, fish species richness and abundance increased gradually, but then decreased significantly at the lower reaches. The highest species richness and abundance were observed in spring and the lowest in winter. The highest value of Shannon-Weiner diversity index (1.96) was found in spring season and lowest (1.69) was found in winter season. Highest value of evenness index (0.35) was found in autumn while lowest (0.31) in winter season .The Simpson dominance index in different sites varies from 0.75 to 0.79. The highest Simpson dominance index (0.79) was recorded at site I and site II and lowest (0.75) was recorded at site III. Highest Simpson dominance index (0.81) was recorded in autumn and lowest (0.73) was recorded in winter. The Redundancy analysis (RDA) revealed that the environmental variables of water temperature, water velocity, and dissolved oxygen were found to be most imperative variables to shape the fish assemblage structure of present study area.Item Diversity and Distribution of Fish in Likhu River of Eastern Nepal(Department of Zoology, 2020) Sunuwar, SusanaAvailable with full textItem Fish Diversity and Community Structure in Ghodaghodi Lake, Kailali(Department of Zoology, 2015) Joshi, DipendraGhodaghodi Lake is an ox-bow perennial Lake of Ghodaghodi Lake Complex, situated in Kailali district. The present study was conducted to understand the fish diversity, community structure and distribution pattern in Ghodaghodi Lake. A total of 13 fish species were recorded from the different section of Ghodaghodi Lake, belonging to five order, eight family and eleven genera. According to fish catch the dominant order and family of Ghodaghodi Lake were found to be Cypriniformes (40%) and Cyprinidae (40%) respectively. The dominant fish species of Ghodaghodi Lake was Labeo gonius followed by Mystus tengara, Nandus nandus, Channa striatus. The correlation between temperature and fish diversity was found to be positively correlated (0.1755, 0.5374, 0.9771 and 0.5652) in all four stations. Similarly, fish diversity and water depth are positively correlated in station I (0.2476), II (0.4376) and IV (0.7597) while station III shows negative correlation (-0.2011). All four stations showed positive correlation (0.8242, 0.8074, 0.9345 and 0.6508) between dissolved oxygen and fish diversity. Similarly, positive correlation was observed between pH value and fish diversity (0.7701, 0.8256, 0.5767 and 0.7337). The highest diversity index (2.46), species richness (6.14) and evenness (0.96) of fish were recorded from station III during the month January. Lowest diversity index (1.75) and evenness (0.90) was found in station II and during the month of October (2.25 and 0.88). Similarly, lowest species richness was found in station I (3.91) and during the month July (5.82). Fish diversity and number of fishes in Ghodaghodi Lake were found to be decreased. This could be due to pollution, illegal fishing and excessive proliferation of aquatic weeds.Item 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.Item Fish Diversity of Dipang Lake in the Mid-Hill of Kaski District, Nepal(Department of Zoology, 2018) Thapa, BhuwanPresent study deals with the fish diversity of Dipang Lake located in the mid-hill of Kaski District, Nepal from May to November in 2017. It explored the fish diversity, species richness, evenness and physico-chemical parameter of Dipang Lake. Fish sampling were done by using cast net, gill net and local fishing gears. Fifteen different species (native and exotic) of fish belonging to 5 orders, 7 families, and 12 genera were recorded from this aquatic ecosystem. The order Cypriniformes (46%) was dominant in terms of both species composition as well as individuals captured. At family level, Cyprinidae contributed by 29.43% and Cichlidae 25% compare with family Channidae (4%) in total number of individual species sampled. Puntius sophore was the most dominant fish species (18.33%) of the total catch. The higher diversity index (2.10) and richness (2.16) was recorded in July and evenness index was recorded in May (0.883). Similarly, higher diversity index and richness were observed at station IV (2.08) and III (2.08) respectively. Higher evenness index recorded at station II (0.859). However, water quality parameters (water temperature; 23ºc to 30ºc, pH; 6.2 to 8 ppm, DO; 5.1 mg/l to 8.38mg/l, free CO xiii 2; 0.8 mg/l to 3.2 mg/l, Hardness; 12 mg/l to 36 mg/l, Alkalinity; 50 mg/l to 100 mg/l) were observed within desirable range supporting freshwater fish. Due to pollution, illegal fishing, and excessive proliferation of aquatic weeds, human encroachments and introduction of exotic fishes the fish diversity and frequency were found decrease day by day. Keywords: Dipang Lake, Fish diversity, Physico-chemical parameterItem Fish Diversity of Sharada River in Salyan Mid-Western Nepal(Department of Zoology, 2015) K.C., BijayaThe present study “Fish diversity of Sharada River in Salyan mid-western Nepal” was conducted to understand the fish diversity of Sharada River, it is one of the main tributatries of Babei River, originated from mahabharat range of Salyan district. Altogether 15 species of fishes belonging to 3 orders, 4 families and 10 genera had been recorded. Status of fish species was analyzed on the basic of fish composition and fish distribution. The diversity of fish species was recorded highest in the station I and low in station II and III. The study revealed that majority of fish species belonged to the Families cyprinidae. The most dominant species of this river was Garra gotyla followed by Barilius bendelensis, Puntius ticto, Puntius sophore, Schistura horai, Tor tor. The highest and lowest frequency occurrences were recorded 15.6 and 2.8 of Garra gotyla and Labeo pungusia respectively. Both conventional and non-conventional fishing appliances were found to be used in Sharada River and its tributaries. Most of fishing appliances and methods used were found seasonal, only cast net and hook and line was noted to be used all throughout the year. Fish population in Sharada River was declining day by day due to various activities such as stone mining, construction of dam for irrigation channel, regular fishing as well as natural calamities etc. The socio-economic condition of fishermen of the Sharada River area was poor, illiterate and unemployed, however, interested to educate children for good future.Item Fish Diversity with Relation to Water Quality of Dhungre Khola, Chitawan(Department of Zoology, 2021) Gautam, SunilSpecies diversity is acknowledged as foremost trait of ecosystem functioning. Seasonal variation of fish assemblage structure with physico-chemical parameters in Dhungre River were studied based on Stratified random survey conducted during September 2019 to May 2020. Three various seasons each with three different stations were selected for data collection. Shannon‟s diversity index, the Simpson index and evenness index have been used to access the diversity. To explore the fish assemblage structure, fish samples were collected in seasonal basis from three sites of the River by using cast net and gill net. A total of 2200 individuals belonging to 7 orders, 11 families, 20 genera and 26 species were collected from Kathar, Botte and Bachauli of Dhungre River. The most abundant species were Puntius sophore followed by Puntius ticto and Schistura devdevi. The topmost Shannon‟s diversity index (2.66) and Simpson index (0.81) were recorded during autumn and winter season respectively. For the station-wise diversity, station 1 had the greatest Shannon's diversity index (2.89) and Simpson index (0.85) of fish. The CCA analysis showed that the fish assemblage was highly correlated with temperature. On the other hand, velocity and DO negatively correlated with carbon dioxide and slightly correlated with pH. Present study could be accountable for further exploration of fish diversity, water parameters or other relevant topics in future. Imposing fisheries regulations to reduce human activities are inevitable to sustain multitudinous fisheries.Item ICTHYOFAUNAL DIVERSITY OF MASYAM KHOLA, PALPA, NEPAL(Amrit Campus, 2023-08-17) Bhattarai, SangamThe present study deals with the fish diversity of Masyam Khola Palpa, Nepal covering two seasons winter and spring season using cast net. A total of 255 fish individuals belonging to 9 species, 7 genera and 2 families was found during study period. Cyprinidae (n=243) was the dominant family comprising of 7 species among 9 recorded species. Barilius bendelensis was the most common fish species on the basis of total no. of catch during the study period followed by Opsarius barna, Puntius sophore and Garra rupecula. Shannon-Weiner diversity index was highest (1.64) at station II and station III while lowest (1.44) at station I, simpson index was highest at station II (0.79) and lowest at station IV (0.76) and evenness index was highest in station I (0.89) and lowest in station IV (0.76). The environmental variables like DO, pH, temperature, and velocity were found to be in suitable range for fish habitat.Item Impacts of Jhimruk Hydropower Dam on Fish and Fisheries of Jhimruk River, Pyuthan, Nepal(Department of zoology, 2018) Poudel, KiranDams are artificial designs which interrupt river natural discharge causing many changes to river’s characteristic and functions. This work assesses the impacts of dam on Jhimruk River by taking fish and water quality parameters as indicators. The fieldwork was done from May 2016 to February 2017 that included fish sampling by using local methods and fisherman and measurement of water quality parameters at three sites i.e. at dam, upstream and downstream. Altogether 17 fish species under 3 orders, 4 families and 10 genera were collected during the study period. Shanon- weiner diversity index showed highest diversity (2.43) of fish in dam area and lowest (1.63) was found in downstream. The study revealed that majority of fish species belonged to the family cyprinidae. The most common species was Channa orientalis followed by Barilius vagra, Puntius ticto, Barilius bendelesis. Two migratory fishes Tor tor and Neolissochilius hexagonolepis were found to be confined to downstream only. Various physical and chemical parameters of the water were found to be altered. Temperature (21˚C), water velocity (1.13 m/s), dissolved oxygen (6 mg/l) were found to be mostly altered during dry season. These ultimate changes was due to the less release of water from dam to downstream and also result in the variation of fish composition and fish diversity.Item Study on the Impact of Fisheries on Jalari Community of Phewa Lake Region Pokhara with Anote on its Ethnoichthyological knowledge(Department of Zoology, 2011) Devkota, SaralaThe present study entitled ‘‘Study on the impact of fisheries on Jalari community of thePhewa lake region with a note on it’s ethnoicthyological knowledge’’deals with the fishand fishery activities, fish diversity of Phewa lake and socio economic status of the Jalari community living in the vicinity. The study also documents ethnoichthyological knowledge of the community. Because of the close man and fish interaction this body of knowledge is deeply rooted in their culture. The literacy status of fisher community is found to be very poor. Altogether 21 species of fish fauna under 16 genera, 6 families and5 orders have been recorded.The fish population in the lake is decreasing due to different human activities and natural calamities such as heavy flooding and erosion. One of the main reasons for decreasing local fish population is because of the exotic species of fishes and use of unconventional and harlmful fishing methods. Majority of the Jalaris are illiterate but their indigeneous knowledge could be used as a useful tool for the protection of some of the important fish species.