Present status of Icthyofaunal diversity of Garhwal Himalayan river Bhilangna and its tributaries with reference to changing environment (original) (raw)
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2018
Bhagirathi River is one of the largest tributaries of river Ganga in India and sustains a rich fish biodiversity as cold water fishery resources. The present study aimed to study the current status of fish species and population abundance of selected fish species in the Bhagirathi River at Uttarakhand. During the present study, a total of 19 fish species belonging to 4 families were reported. Schizothorax and Tor fish species (Cyprinidae family) were the dominant species (>50 % of the total fish catch) in the riverine segments of the river Bhagirathi, while Cyprinus carpio (common carp) is the dominant species in the impoundment segment of Tehri reservoir. Few other fish species of Barilius, Garra, and Glyptothorax etc. also have been recorded during the study. The comparison of the present result with earlier reports delighted that endemic fish fauna have to be diminished with the progression of time in the Bhagirathi river system, which may because of debasement and fractures o...
International journal of applied research, 2015
The present study was conducted in the Eastern Himalayan region to generate a primary database on ichthyofauna diversity of seven rivers in three districts (Cooch Behar, Jalpaiguri and Alipurduar) of West Bengal, India. Out of the seven rivers, five rivers originate from Bhutan ghat hills, and the other two rivers the Teesta, originates from North Sikkim and river Karala from Jalpaiguri. 141 indigenous fish species belonging to 31 families were identified. The family Cyprinidae represented the largest diversity accommodating 21 genera and 46 species. Amongst all the fishes, 99 species have ornamental value and 87 species the food value. Ornamental fishes are dominant over the food fishes and carnivorous fishes are dominant over the omnivorous and herbivorous fishes. According to IUCN (International Union for Conservation of Nature ) and CAMP (Conservation Assessment and Management Plan), the conservation status of the fishes are listed as 1 (1%) species as Critically Endangered, 12 ...
Ecology, Environment and Conservation, 2023
Ichthyofaunal diversity in Jia Bharali River of Assam, Northeast India, has been carried out from September 2018 to March 2021. The study emphasized the documentation of fish faunal diversity in relation to water parameters of previously undocumented ecological pockets of Himalayan foothill zones of north-bank landscapes of Assam. Study revealed altogether 69 fish species belonging to 6 orders and 20 families in Jia Bharali River. Cypriniformes was the most dominant (42 species) order followed by Siluriformes (14 species), Perciformes (8 species), Synbranchiformes (3 species), whereas, Beloniformes and Clupeiformes support one species each. The highest species diversity was found in Site-1 (H' = 3.76) whereas, in terms of seasons, the highest species diversity was found in retreating monsoon (H' = 3.80). Among the 69 species of fish, 56 species (81.16%) were IUCN categorized as Least Concern, 6 were Not Evaluated (8.7%), two species were Near Threatened (2.90%), three were Data Deficient (4.34%), and one species each was Endangered (1.45%) and Vulnerable (1.45%) respectively. Analysis of the relationships between water parameters and ichthyofaunal diversity showed a positive correlation between increasing dissolved oxygen and species richness. Water temperature and pH showed a positive correlation with species abundance in the study area.
Ichthyo-Diversity in different rivers of West Bengal, India: Status and conservation strategy
International Journal of Fisheries and Aquatic Studies, 2022
West Bengal is surrounded by many rivers. Rivers plays a decisive role in freshwater habitat and connects with ocean. But fish diversity knowledge is inadequate in different rivers of West Bengal. West Bengal provides 7.5% of resources of water of the country. West Bengal is fulfilled with many resources of water like, beel, pond, rivers. Freshwater diversity in rivers may loss due to anthropogenic effect and also by pollution. Besides this exploitation and change of climate are another major cause of biodiversity loss. Decreasing trend of fish diversity is a aggregate approach to conservation of fish diversity. For this reason riverine fishes are the threatened taxa. But less effort have been dedicated for conservation of river fishes this review helps to understand fish species in south and north Bengal rivers in West Bengal.
Diversity and distribution of fish fauna in the Ib River, a tributary of Mahanadi, India
Indian Journal of Fisheries
Ichthyofaunal survey was conducted in the Ib River (21°44’ to 22°50’ N; 83°56’ to 83°54’ E), an important tributary of Mahanadi, to evaluate the diversity and distribution of freshwater fishes along six sites on seasonal basis between February, 2016 and January, 2017. A total of 55 species belonging to 42 genera, 21 families and 9 orders were recorded from the study area. Maximum number of species belonged to the Order Cypriniformes (41.8%) followed by Siluriformes (21.8%) and Perciformes (21.8%). Maximum value of species richness was observed in downstream areas; Sundargarh and Barghat and least in upper stretches of Pamsala. Shannon–Weiner diversity index ranged between 2.47 to 3.68 at the six sites of Ib River indicating healthy state of the river. Bray-Curtis similarity cluster analysis suggests that similarities between sites decrease with increasing distance, with highest similarity found between Sundargarh and Barghat sites. Baseline data on fish biodiversity has been generat...
Assessment of Fish diversity of Tunga River, Karnataka, India
In the present study, an effort has been made to investigate the fish resources quantitatively by studying the ichthyofaunal biodiversity of Tunga River stretch from Gajanoor fishing village to Kudali of Shivamogga district. Monthly sampling was conducted at three centres during July 2010-June 2012 by using gill nets. A total of 45491 kg fishes from three landing centres were collected and Gondichatnalli recorded maximum followed by Shivamogga and Honnapura. The most abundant fish species was Calta catla (28%) followed by Labeo rohita (17%) and Clarias gariepinus (11%). During present investigation a total of 37 species belonging to 11 families and 4 orders were recorded. The order Cypriniformes found to be dominant with 23 fish species followed by Siluriformes 11 species and Perciformes 2 species. Although, 37 species were recorded, the family Cyprinidae recorded 19 fish species (51.35%) followed by Bagridae, 4 fish species (10.81%) and Claridae with 3 fish species (8.10%) each. The Simpson's index of diversity (1-Lambda') was highest in Gondichatnalli (0.8802) followed by Shivamogga (0.8580) and Honnapura (0.8523). This indicated the greater fish biodiversity in Gondichatnalli when compared to other two centres. The biomass of fish species was more in Gondichatnalli (S= 36, N=19014) followed by Shivamogga (S =31, N= 14671), and Honnapura (S =37, N= 11806). Further, the other indices such as Pielou's evenness (J'), Shannon H'(loge) and Simpson 1-Lambda' were also used to assess the richness of biodiversity of all the three fish landing centres. In this study an attempt has been made to evaluate the ichthyofaunal diversity in the region and suggests mitigating measures.
Diversity and Composition of Freshwater Fishes in River Systems of Central Western Ghats, India
Environmental Biology of Fishes, 2003
The Western Ghats (India) is a region of high biological diversity and endemicity of terrestrial fauna, but very little is known about its freshwater species distributions. Four rivers, Sharavati, Aghanashini, Bedti and Kali, of the central Western Ghats were studied for their fish diversity and composition. A total species richness of 92 species (and an endemicity of 25%) was reported. A comparison of expected species richness (SR) estimates using different statistical estimators was made – these showed the expected SR to be in the range of 92–120 species. Many of the species were found to be shared with those belonging to the southern Western Ghats, but the study also unearthed new findings in terms of description of a new species and extension of the known distribution range of some of the species. The study at varying spatial and temporal scales also showed that while the rivers are very similar to each other in terms of the SR values, they do vary with respect to the species composition. Species compositions across upper (or lower) reaches of these rivers were found to be more similar to one another than the upstream and downstream reaches in the same river. Temporal patterns, with regard to diurnal activity of fishes were studied. These showed that of the 72 species collected at night, 29 were exclusive to night sampling. Though much of the information of the feeding and habitat preferences of the fishes in this region is lacking, it is speculated that the differences in their activity patterns could be related to feeding and predator avoidance.
The present study was carried out to investigate the comparative seasonal distribution and relative abundance of fish fauna of streams Bachan Gad of river Alaknanda and Kakda Gad of river Mandakini of Mid-himalayan Ganga river System. Total length of the Bachan Gad is 14.5 km from origin to the confluence at main river Alaknanda with an altitudinal variation from 605.94 to 1418.23m (a.s.1), whereas, total length of the Kakda Gad is 15.5 km. from origin to confluence at main river Mandakini with altitudinal variation from 984.50 to 1993.70 m (a.s.1). Total 23 species from Bachan Gad and 20 fish species were identified from Kakda Gad. The differences in the availability of fish-fauna were directly related to the nature of the profile and slope of tributaries; which affects the migration and breeding grounds of the fishes inhabited in the main river Alaknanda and Mandakini of Ganga river system. Variation in the availability of fishes has been recorded from different sites of the stream. In streams and rivers the changes take place along their length is directly related to the eco-physico-chemical nature (water depth, current, substratum etc). All these factors which change along the length of streams are also the factors which control the distribution of the various sections of the biotic fauna and flora.