scholarly journals Longitudinal Patterns of Population Structure for Fishes Inhabiting River Tawi in Jammu region (J&K)

2017 ◽  
Vol 14 (3) ◽  
pp. 1121-1127
Author(s):  
Roopma Gandotra ◽  
Rizwan uz zaman ◽  
Vivek Vivek
Keyword(s):  
Population Structure ◽  
Fish Species ◽  
Diversity Indices ◽  
Assemblage Structure ◽  
Fish Diversity ◽  
Longitudinal Patterns ◽  
Downstream Section

ABSTRACT: The present study, was carried out to investigate the diversity and assemblage structure of ichthyofauna of bothupstream and downstream section of river Tawi from four different sections i.e. Station I (Chenani), Station II (Jhajjar kotli),Station III (Nagrota), and Station IV (Gujjar Nagar).The sampling was done from January 2016 to December 2016. The results of present investigation revealed the occurrence of twenty one fish species in all the study stations belonging to five orders viz. Cypriniformes, Mastacembeliformes, Synbranchiformes, Perciformes & Siluriformes and 6 families i.e. Cyprinidae, Nemachilidae, Mastacembelidae, Chinnidae, Sisuridae and Bagaridae. In all the study stations Cyprinidae was found to be dominant(62%)followed by family Nemacheilidae,(9%) Mastacembelidae, (9%) Channidae, (10%) Sisuridae and Bagaridae showed least contribution of 5% each. The fish diversity indices i.e. Shannon weiner (H) and Evenness (e) at all the stations were 1.286 & 0.7234, 1.662 & 0.753, 1.959 & 0.5454 and 1.978 &0.4252 at station I, II, III and IV respectively.

scholarly journals Longitudinal patterns in distribution of native and non-native fish species in a regulated temperate Neotropical river

2021 ◽  
Vol 33 ◽  
Author(s):  
Andrea Bertora ◽  
Fabián Grosman ◽  
Pablo Sanzano ◽  
Juan José Rosso
Keyword(s):  
Dissolved Oxygen ◽  
Fish Species ◽  
Environmental Conditions ◽  
Fish Assemblage ◽  
Native Species ◽  
Assemblage Structure ◽  
Native Fish ◽  
Fish Assemblage Structure ◽  
Longitudinal Patterns ◽  
Tolerant Species

Abstract: Aim We evaluated the longitudinal patterns in distribution of native and non-native fish species in a hydrologically fragmented and environmentally variable lowland temperate river. Methods Four sites representing contrasting habitat and environmental conditions were sampled: a clear water reservoir, a turbid water lagoon and two river reaches with clear and turbid waters each. Environmental variables were measured in situ and in the laboratory. Fishes were sampled using trammel and beach seine nets. Results Two main environmental scenarios were identified: the upstream reaches, with colder, clearer and nutrient-oxygen poor waters (reservoir and its downstream river) and the downstream reaches, where turbidity, dissolved oxygen, water temperature, conductivity and nutrients largely increased (lagoon and its downstream river). Fourteen species with a high non-native/native (4:10) ratio were collected. Non-native species (NNS) were confined to lentic conditions, where the silverside Odontesthes bonariensis dominated. Native species (NS) better thrive in lotic conditions where the turbid scenario further favored tolerant species. Environmental conditions also seemed to influence the distribution of NNS. Fish assemblage structure considering either, all species, NNS or NS significantly differed among sampled reaches and habitat (lentic-lotic) conditions. Total fish abundance was higher in lentic reaches. Species richness and diversity were favored by the turbid scenario. Beta diversity was mostly explained by the replacement component revealing the substitution of species as the main pattern of variation. Water conductivity, nitrates and dissolved oxygen were the most important predictor variables in the best and most frequent explanatory models of fish assemblage structures. Conclusions Our results revealed that a low diversified Neotropical fish fauna is disrupted by habitat fragmentation due to the creation of artificial impoundments and the introduction of NNS. Environmental conditions further modulate the fish assemblage structure by affecting the distribution of species where tolerant species were favored by turbid, nutrient-rich waters with higher conductivity and pH.

scholarly journals Fish Diversity and Conservation Perspectives of Gandak River, India

Our Nature ◽  
2013 ◽  
Vol 11 (1) ◽  
pp. 76-84 ◽  
Author(s):  
P. K. Srivastava
Keyword(s):  
Distribution Pattern ◽  
Fish Species ◽  
Lower Risk ◽  
Uttar Pradesh ◽  
Assemblage Structure ◽  
Fish Diversity ◽  
Threat Status ◽  
Commercially Important ◽  
Gandak River ◽  
Near Threatened

Study of 10 km stretch of Gandak River in Uttar Pradesh revealed the ichthyofaunal diversity, assemblage structure, distribution pattern, threat status, ornamental and commercially important fishes. In all 54 fish species were recorded of many commercially important fishes. Among these species 45% belong to lower risk near threatened (LRnt), 26% vulnerable (VU), 11% lower risk least concern (LRlc), 11% not evaluated (NE) and 7% endangered (EN) category. Cyprinidae 33% were most important followed by Bagridae (11%), Channidae (9%), Tetradontidae (5%). DOI: http://dx.doi.org/10.3126/on.v11i1.8246 Our Nature Vol.11(1) 2013: 76-84

scholarly journals Fish Diversity and Its Threatened Status of the Dharla River in Bangladesh

2021 ◽  
Vol 79 (4) ◽  
pp. 163-172
Author(s):  
Md. Ashraful Alam ◽  
Yeasmin Ara ◽  
Imran Parvez ◽  
Jayanto Kumar Roy ◽  
Macksood Alam Khan
Keyword(s):  
Fish Species ◽  
Diversity Indices ◽  
Fish Diversity ◽  
Indigenous Species ◽  
Local Data ◽  
Exotic Fish ◽  
Fish Biodiversity ◽  
Fishing Gears ◽  
Threatened Status ◽  
Destructive Fishing

Abstract Fish diversity of a riverine ecosystem became reduced due to different manmade and natural calamities. This study investigated the present fish biodiversity status of the Dharla River located (25.8103° N, 89.6487° E) in the northern part of Bangladesh from January to December 2018. In this study, the existing fish biodiversity status of the Dharla River was estimated in terms of diversity indices and threatened status (both global and local). Data was collected from the three sampling sites of the river using different fishing gears and three selected fish markets located in the Kurigram district of Bangladesh. A total of 76 fish species were identified belonging to 8 orders, 26 families and 57 genera. The Cyprinidae was the most dominant family represented by 14 species followed by the Danionidae (13 species), Bagridae (8 species) and few minor families. Apart from the indigenous species, nine exotic fish species were also recorded. The Shannon-Weaver diversity (H), Pielous evenness (e) and Margalef richness (D) indices ranged from 3.00 to 3.71, 0.62 to 0.94 and 3.94 to 7.95, respectively. Out of 76 indigenous species, 28 species (37%) were identified as threatened in Bangladesh, which included critically endangered (4), vulnerable (9) and endangered (15) species. Indiscriminate fishing through poisoning and destructive fishing gears were identified as the major threats to fish biodiversity of the Dharla River. Thus, the river serves as considerable support for threatened indigenous fishes. Therefore, necessary steps are needed to stop destructive fishing, establish permanent fish sanctuaries and proper monitoring for maintaining sustainable biodiversity in the Dharla River.

scholarly journals CATCHABILITY AND DIVERSITY OF FISH SPECIES CAPTURED BY GILL NET IN NEW CALABAR RIVER, NIGERIA

2020 ◽  
Vol 26 (2) ◽  
pp. 107
Author(s):  
Olaniyi Olopade ◽  
Henry Eyina Dienye ◽  
Ogheneforon Oderhohwo ◽  
Nathanael Akinsafe Bamidele
Keyword(s):  
Fish Species ◽  
Wiener Index ◽  
Diversity Indices ◽  
Fish Diversity ◽  
Catch Per Unit Effort ◽  
Fish Family ◽  
Gill Nets ◽  
Gill Net ◽  
The Status ◽  
Sarotherodon Melanotheron

The aim of this study was to analyze fish species caught by gill nets and fish diversity of the New Calabar River. Three sampling stations were set based on the coverage situation of the river and ichthyofauna associated with gill nets were sampled twice monthly from February to July 2018. A total of 3,251 fish specimens, representing 11 orders, 15 families, and 28 species, were captured. The order Perciformes was identified as the most abundant representing five families while the remaining had one family each. The fish family Cichlidae was the most represented with seven species, and other notable families were Alestidae, Clupeidae, and Mugilidae, representing three species each. Prominent among the fish caught monthly included Liza falcipinnis, Mugil cephalus, Sarotherodon melanotheron, Sarotherodon galilaeus, Coptodon guineensis, and Sardinella maderensis. The mean catch per unit effort (CpUE) ranged from 3.15±0.2 to 4.85±0.2 kg unit-1 day11. Results of diversity indices revealed that Shannon-Wiener index values varied between 2.64 and 2.82, Simpson diversity ranged from 0.07 to 0.10, and Pielou’s evenness index values ranged from 0.85 to 0.95. The values obtained in this study showed that the status of fish diversity in New Calabar River was stable.

Effects of Hydrology on Fish Diversity and Assemblage Structure in a Texan Coastal Plains River

2018 ◽  
Vol 148 (1) ◽  
pp. 207-218 ◽  
Author(s):  
Luke M. Bower ◽  
Friedrich W. Keppeler ◽  
Eduardo R. Cunha ◽  
Yasmin Quintana ◽  
David E. Saenz ◽  
...  
Keyword(s):  
Assemblage Structure ◽  
Fish Diversity ◽  
Coastal Plains

scholarly journals KEANEKARAGAMAN DAN KEKERABATAN IKAN FAMILI CYPRINIDAE PADA EKOSISTEM BENDUNGAN COLO SUKOHARJO JAWA TENGAH

2018 ◽  
Vol 14 (2) ◽  
pp. 137
Author(s):  
Ragil Nur Cahyono ◽  
Agung Budiharjo ◽  
Sugiyarto Sugiyarto
Keyword(s):  
Fish Species ◽  
Diversity Index ◽  
Abiotic Factors ◽  
Morphological Characters ◽  
Cluster Method ◽  
Fish Diversity ◽  
Abiotic Factor ◽  
Fish Family ◽  
Water Ecosystem ◽  
Before And After

The Cyprinidae fish family is a family of freshwater fish with the largest number of species and its presence is widespread almost all of the world. The main habitat of this family is the river's ecosystem, river damming changing the environmental conditions between the ecosystems before and after the dam's watergate. Such as Colo Dam that dammed Bengawan Solo River that allegedly affects the diversity of species of Cyprinidae fish. So this study was conducted in order to determine the diversity and kinship of the Cyprinidae fish family in the ecosystem before and after the Colo Dam watergate. Sampling was conducted September-October 2017 at Sukoharjo Colo Dam by Purposive sampling method. Identify fish species used Kottelat identification books. The diversity of fish species was calculated by Shannon Wiener's diversity index. The correlation between abiotic factor and fish diversity was analyzed by a regression test. The kinship of the fish was analyzed by the Ntsys cluster method (2.02i). The results showed that the Cyprinidae fish species that live in the Colo Dam ecosystem contain 10 species, the diversity of Cyprinidae fish in the fast-water ecosystem of station I is higher (0,96) then the slow-water ecosystem of station II, III, and IV (0,47; 0,73, and 0,58). Abiotic factors of current velocity affect the level of fish diversity reaches 91%. The Cyprinidae fish kinship rate has a coefficient of resemblance between 60% - 85%, fish with the same genus and many similarities in morphological characters and their behavior is categorized as having a close kinship.

scholarly journals Present and past status of fish fauna of river Basantar, an important tributary of the river Ravi, in Samba district, Jammu (J&K)

2012 ◽  
Vol 4 (1) ◽  
pp. 123-126 ◽  
Author(s):  
Arti Sharma ◽  
S. P. S. Dutta
Keyword(s):  
Environmental Factors ◽  
Fish Species ◽  
Fish Fauna ◽  
Fish Diversity ◽  
Anthropogenic Pressure

Icthyofaunal study of river Basantar, an important tributary of river Ravi in Samba district, Jammu (J&K) has revealed the existence of 35 fish species belonging to 5 orders, 10 families and 25 genera. There is dominance of Cypriniformes (18 spp.) followed by Siluriformes (10 spp.), Perciformes (4 spp.), Synbrachiformes (2 spp.) and Osteoglossiformes (1 sps.). Present record of 35 fish species when compared with the earlier report of 59 fish species reveals a decline in fish diversity and is caused by environmental factors and anthropogenic pressure.

scholarly journals Studies on fish diversity concerning Hydro-ecology of Kangsabasti river in Purulia district, West Bengal, India

2020 ◽  
Vol 26 (2) ◽  
Author(s):  
Manab Kumar Saha
Keyword(s):  
Fish Species ◽  
Physicochemical Parameters ◽  
West Bengal ◽  
Monsoon Season ◽  
Fish Diversity ◽  
Riverine Ecosystem ◽  
Post Monsoon ◽  
Fish Catch ◽  
Purulia District

Fish diversity depends both on various physicochemical parameters and the biological components of the riverine ecosystem. During the study period from January 2017 to December 2019 the highest fish diversity and density were observed in post-monsoon and lowest in pre-monsoon season in the Kangsabati River, Purulia District of West Bengal. Twenty five fish species, associated with 19 genera, 10 families and 5 orders have been identified. It was recorded that the Cyprinidae was the predominant family, which represented 56% of the entire fish catch.

scholarly journals Fish Diversity of River Siyom of Arunachal Pradesh India: A Case Study

Our Nature ◽  
1970 ◽  
Vol 8 (1) ◽  
pp. 164-169
Author(s):  
K. Bagra ◽  
D.N. Das
Keyword(s):  
Fish Species ◽  
Water Bodies ◽  
Anthropogenic Factors ◽  
Fish Diversity ◽  
Arunachal Pradesh ◽  
Fishery Resources ◽  
The Status ◽  
Social Restriction ◽  
Destructive Fishing

Arunachal Pradesh being rich in fishery resources biophysically, the status of the fish diversity is not known from all the water bodies. A case study was undertaken in the river Siyom (28°11′25′′-28°10′52′′N and 94°45′17′′-97°47′51′′E) of West Siang district, Arunachal Pradesh from 2002 to 2004 with the fragmentary work till 2007. For the purpose, sampling of fish was done from the river time to time using local contraption along with modern nets. A total of 44 species of fishes belongs to 9 families were identified. Fishes of family Cyprinidae were found to be dominant followed by Balitoridae. Some of the fish species were found very rare in the river, which may be due to various anthropogenic factors. Therefore, in addition to social restriction on community fishing some awareness measures need to be taken to prevent the destructive fishing activities in the river.DOI: 10.3126/on.v8i1.4324

Understanding spatial and temporal patterns of fish diversity and assemblage structure vis-a-vis environmental parameters in a tropical Indian reservoir

2019 ◽  
Vol 26 (9) ◽  
pp. 9089-9098 ◽  
Author(s):  
Lianthuamluaia Lianthuamluaia ◽  
Puthiyottil Mishal ◽  
Debabrata Panda ◽  
Uttam Kumar Sarkar ◽  
Vikash Kumar ◽  
...  
Keyword(s):  
Environmental Parameters ◽  
Temporal Patterns ◽  
Assemblage Structure ◽  
Fish Diversity ◽  
Spatial And Temporal Patterns
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