Survey on the Present Status of Fish Species Diversity in a Stretch of Hooghly River and Inland Areas of Hooghly District of West Bengal, India (original) (raw)
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The present study has shown that studied Hooghly river sector supported 87 fish species belonging to 12 orders, 39 families and 69 genera. The order Perciformes was dominant with 8 families and 25 number of fish species followed by the order Siluriformes with 8 families and 24 number of fish species. Fish diversity was assessed by calculating the various diversity indices such as Shannon-Wiener index (H /), Simpson's dominance index (C) and evenness index (J). Higher H / value (3.694) observed in post monsoon and lowest (2.398) in monsoon. High evenness value (0.6930) was recorded during monsoon period. Seasonal water quality parameters such as water temperature (o C), pH, DO, nitrate and phosphates has been recorded and were found suitable for fish population.
The present study revealed that a total of 101 indigenous species of large fish (28 species) and Small Indigenous fish (73 species) belonging to 63 genera and 31 families were observed and identified while 17 exotic fish species were found under 5 families. Among the indigenous species, the highest number of species were found in family Cyprinidae and Bagridae with a relative diversity of 28.28% and 11.11%. In case of group species richness, highest number 27 fish species were found in catfish group followed by 12 species of carp, 8 species of each barbs and minnows, 6 species of eel fish, 8 species of loaches, 4 species of each prawn, snake-headed or airbreathing fish and glass perches, 3 species of each climbing perches and clupeid, 2 species of each goby fish, knifefish and puffer fish, and rest of the group true perch, leaf fish, halfbeak fish, Needlefish, mullet fish, anchovies and killifish has one species. Of the total species, 47 species were considered as least concerned, 10 species as vulnerable, 11 species as endangered, 11 species as critically endangered, 14 species as nearly threatened and 8 species as data deficient. Considering the seasonal variation for all selected areas simultaneously, Shannon-Weaver diversity (H) index were found ranged from 3.53 (May) to 4.37 (January) where the highest Shannon-Weaver diversity index value 4.37 were found in winter season while 3.01 in Phulkumar, 3.73 in Dudhkumar, 3.87 in Dharla, 3.67 in Tista and 3.79 in Brahmaputra were recorded separately.
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.
Studies on biodiversity drags the attention of scientific world since the wild fauna and flora are the most valuable non- reproducible natural resources-since extinction lead to the loss of gene pool- on Earth. The present study aimed to analyze the diversity and seasonal distribution of Ornamental fishes in Pallickal River and the major physic- chemical parameters influencing their distribution. The period of study was from February 2012 to January 2013. Fish samples and water samples were collected seasonally. Non- seasonal collections were made for assessing the diversity of Piscean population. The specimens were preserved at 5-6% formalin and taxonomic identification was done using standard keys. Water samples were analyzed using standard procedures. One way ANOVA was performed to evaluate the variations among the data obtained for hydrological parameters in different seasons and proved highly significant (P<0.001). 25 fish species were identified belong to 13 families and 8 orders; dominated with Cyprinids, among them barbs. Three Endangered, 7 vulnerable and one critically endangered species were included in the list, with 4 endemic to Kerala, 7 endemic to Western Ghats, 4 endemic to India and 6 endemic to Indian subcontinent. Two brackish water fishes were obtained in the collection. No exotic species were found during the study. Biodiversity indices were calculated using Biodiversity Pro and except McIntosh evenness index, all other indices showed remarkable variation with seasons.
SPATIAL DISTRIBUTION AND DIVERSITY OF FISHES IN DIFFERENT ECOLOGICAL SECTIONS OF SPRING- FED RIVER MANDAL FROM UTTARAKHAND, INDIA, 2018
ARTICLE INFO ABSTRACT The fish play an important role in the life of rural folk in Garhwal Himalaya as it is a cheaply available protein rich source. In the present communication an attempt has been made to study the spatial distribution, density and diversity of fishes in three different sections of river Mandal in Pauri Garhwal. The study was based on two spots in upper rhithon section, two spots on lower rhithron section and one spot in the lower potamon section. It was observed that the middle stretch (Lower rhithron zone) was more diverse and productive where fish productivity was 46 CPP at Spot no 3 (19 species) and 34 CPP at spot no 4 (13 species). Upper stretch of the river was less productive. The lowermost section has low diversity in term of taxon but the biomass production was maximum. Overall 20 taxa were observed wit the dominance of family cyprinidae with 10 taxon and cobitidae with 7 taxon. Channidae was represented by 2 taxon and family balitoridae, ambliceptidae and mastacembelidae by 1 taxon each. Diversity was assessed with the help of Simpson, Shannon and Wiener, Menhinick, Margalef and equitability J indices. Multivariate analysis was done with the help of cluster and principal component analysis. Some detrimental ecological parameters were also analysed which had either positive (pH and temperature) or negative (velocity of water current and dissoved oxygen) impact on fish population.
Biodiversity of Freshwater Fish in Kelekar Floodplain Ogan Ilir Regency in Indonesia
Journal of Tropical Biodiversity and Biotechnology, 2022
The purpose of this study is to investigate fish biodiversity in the Kelekar floodplain. The study is explorative, with the determination of observation stations and with purposive sampling methods. Fishes were captured approximately 1.509 individuals consisting of 17 families and 24 species. The Shannon-Weiner diversity index was 2.394; 2.691; and 2.183 for station 1, 2, and 3, respectively. The Evenness index was 0.764; 0.871; and 0.806 for station 1, 2, and 3, respectively, meanwhile the highest value of Simpson's dominance index was 0.045. The biodiversity index of the three stations was in the medium category.
Assessment of fish diversity in Shatghari point of Surma River, Golapgonj, Sylhet, Bangladesh
2017
A quest was conducted to assess the status of fish diversity in Shatghari point of Surma river, Golapganj, Sylhet from January 2015 to September 2015. Multivariate analyses were performed using the software PRIMER V6 and Canonical Correspondence Analysis (CCA) was done using the PAST software. In the present study, 34 species of fishes belonging to 7 orders were identified from the study area where Cypriniformes (11 species) encompassing highest percentage (76.56%) of the whole biomass. The Shannon-Wiener diversity index, Margalef richness index, Pielou’s evenness index and Simpson dominance index were found to be 2.31±0.69, 3.86±0.31, 0.46±0.03 and 0.88±0.007 respectively. Among the identified fish species, 44.63% were recorded as threatened according to IUCN and 5.49% were exotic species in respect of number. Top most 14 fish species were considered for CCA and it’s indicate that, two most important environmental parameters CO2 and TDS are shaping species assemblage structure in S...
2018
The present paper attempts to document the potential ornamental fishes (POFs) and assess their diversity in two river basins of Arunachal Pradesh that are still unexplored in such a way. Several diversity indices are computed river-wise and statistically compared. From Dikrong and Ranganadi river basin a total of 52 and 29 POF species are documented respectively. The species compositions are quite different in the two river basins may be because of their altitudinal differences. The computed diversity indices are a little confusing because one river is more diverse while the other has more species richness. Hence, diversity profiles are constructed using Renyi index. The intersecting profiles reveal the two river basins are non-comparable in terms of ornamental fish diversity. The paper concludes with the note that compilation of such information would be of immense value practically to generate a river-wise list of POF of the state to design fish conservation strategies in future.
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences, 2018
An attempt was made to systematically study the fish diversity and assemblage patterns in response to limnological dynamics of Chambal river basin in central India. A total of 56 fish species belonging to 09 orders, 18 families and 39 genera were recorded in the present study. Group-wise distribution of fishes showed that catfishes were the most dominant (23.21%). The most dominant species as per total relative abundance of the river was Glossogobius giuris (6.84%). The abundance of fishes was found to be highest in winter. Six fish diversity indices-Shannon-Wiener, Dominance, Simpson, Margalef, Evenness and Equitability indices were calculated and ranged 3.
Fish Diversity in Freshwater Perennial Water Bodies in East Midnapore District of West Bengal, India
2008
Present survey synthesized information on fish biodiversity in the perennial freshwater body of Ramnagar, East Midnapore district of West Bengal, India. We documented 45 fish species under 29 genera, 18 families and 8 orders during the periods from1990 to 1995, whereas, 34 species from 21 genera and 12 families under 7 orders were recorded presently from freshwater body of different perennial pond. This present database of ichthyofauna clearly indicated that 11 fish species, 8 genera, 6 families and 1 order have lost from this investigated area. Basically, this agricultural based area associated with profuse application of various chemicals, poisons and drugs in agricultural field that largely pollute perennial water body and ultimately exerting growing pressure on living aquatic resources and driven significant fish biodiversity decline. However, over fishing, chemicals, agricultural runoff and other forms of pollution are most important factors which should be restricted for the conservation of freshwater fish biodiversity. Therefore, it may be concluded that preparation of zone wise database of these information and their implementation through Government and various Non-Government Organizations would be the key tools for conservation of freshwater fish biodiversity.