An Impact Assessment of Betani Irrigation Dam on Fish Diversity of Damak Municipality, Jhapa, Nepal

Limbu, Jash Hang; Gurung, Jeevan Kumar; Subba, Suren; Khadka, Niraj; Adhikari, Ashim; Baniya, Chitra Bahadur

doi:10.21608/ejabf.2021.161363

Cited by 9 publications

(4 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Considering the facts in regard of nearby waterbodies of Brahmaputra River, the fish composition of Ranganadi river is seems to be affected because of some anthropogenic factors like Hydel project, rampant fishing in an unsustainable matter which involves electrode fishing, lethal lime fishing etc. Similar effects on fish community because of man-made factors can be seen in the recent reports of Limbu et al, (2021) and Shao et al, (2019) conducted respectively Nepal and China.…”

Section: Total Suspended Solids (Tss)supporting

confidence: 81%

Investigation on Ichthyofaunal Assortment and Water Quality Parameters in the Ranganadi River of North-East India

Dohutia¹,

Mali²,

Chutia³

et al. 2023

ASD

View full text Add to dashboard Cite

Background: The north-eastern region of India well known its innumerable natural resources. Flanked by two of the biodiversity hotspots of Indian subcontinent, North-East India has rich biological diversity of flora and fauna in its every corner. The present study has undertaken to assess the ichthyofaunal resources and physico-chemical parameters of Ranganadi river which will contribute to the scientific knowledge domain and aid in the planning of much needed conservation strategies. Methods: The ichthyofauna and water quality parameters has been studied from February 2021 to January 2022 on a monthly basis in the three different terrains of Ranganadi river. Result: The study revealed 76 fish species belonging to 9 different orders and 26 families. The major share contributed by the order cypriniformes (47.36%) followed by siluriformes (23.68%), Perciformes (13.15%), Synbranchiformes (5.26%), Anabantiformes (3.94%), Clupeiformes (2.63%), Tetradontiformes (1.31%), Anguilliformes (1.31%) and Beloniformes (1.31%) constitutes total ichthyofaunal composition of Ranganadi river recorded in the survey. During the survey, occurrence of fishes from Endangered (EN), Vulnerable (VU), Near Threatened (NT) category also documented in the river basin. The water quality parameters were found to be in the suitable ranges in contrast to parameters of healthy aquatic bodies.

show abstract

Section: Total Suspended Solids (Tss)supporting

confidence: 81%

Investigation on Ichthyofaunal Assortment and Water Quality Parameters in the Ranganadi River of North-East India

Dohutia¹,

Mali²,

Chutia³

et al. 2023

ASD

View full text Add to dashboard Cite

show abstract

“…The tipping point coincided with the development of the marine port of Veracruz in 2014 (Jimeńez-Badillo et al, 2014), where the Sacrificios reefs were nearby and the most affected by the development. Some studies had detected alterations in community structure at sites close to construction areas (Gehrke et al, 2002;Hang Limbu et al, 2021), with the impacts being especially problematic on the more mobile fishes. In conjunction with the development itself, the increase in average rainfall from 2013-2016 (Comisión Nacional del Agua Temporal variation of functional redundancy in fish assemblages of the Parque Nacional Sistema Arrecifal Veracruzano (PNSAV).…”

Section: Figurementioning

confidence: 99%

Functional diversity in reef fish assemblages in the Parque Nacional Sistema Arrecifal Veracruzano, Mexico: Temporal and spatial changes

Russet-Rodríguez

Pérez-España²,

Payán-Alcacio³

et al. 2023

Front. Mar. Sci.

View full text Add to dashboard Cite

The Parque Nacional Sistema Arrecifal Veracruzano (hereafter called PNSAV) is the largest coral reef extension in the central region of the Gulf of Mexico. These reefs are unique since they have developed near a coastal environment that is directly influenced by the discharges of Veracruz city, the rivers located on the continental shelf, and the port of Veracruz. This study evaluates the functional diversity, in terms of richness, evenness, and divergence, of the PNSAV fish community. We were interested in quantifying any similarities or differences in functional diversity metrics when one examines reef fish assemblages on a single reef or joint reef subsystems; thus, is there a difference based on scale? A total of 297 fish assemblages were observed in seven PNSAV reefs between May 2006 and April 2021. Significant differences were found in the Functional Richness of the assemblages between subsystems, years, and reef-depth interaction, but none were found among the reefs, or between seascapes. The Functional Diversity presented annual mean values between 0.83 (sd= 0.085) and 0.90 (sd= 0.068) and did not show statistical differences between years, seascape, or reefs. In contrast, statistical differences were found between subsystems, and depth level and the seascape-depth interaction. The annual mean Functional Evenness values ranged between 0.34 (sd= 0.128) and 0.44 (sd= 0.060), and significant differences were detected between years, reef, and reefs-depth level interaction, but no difference were found between subsystems. Reef-fish diversity was greater within the north coral reef subsystem than the southern of the PNSAV. There were no overall tendencies for increased functional diversity throughout the time during this study.

show abstract

“…Data from Nepal and other worldwide river systems show that certain dams have negative consequences (Agostinho et al, 2008;Gubhaju, 2012;Mandal & Jha, 2013;Rai, 2008;Sankar et al, 2012;Yoshida et al, 2020). Fish vulnerability in Nepal has increased due to the construction of fish ladders, and the construction of waterways and dams without completing an environmental impact assessment (EIA) (Hang Limbu et al, 2021). Nepal's National Biodiversity Conservation Strategy includes fish fauna (HMG/MFSC, 2002).…”

Section: Introductionmentioning

confidence: 99%

Impact of Irrigation Dams on Fish Diversity of Budhikhola in Bardiya, Lumbini Province of Nepal

Chaudhari

2024

Acad. Res. J.

View full text Add to dashboard Cite

This extensive study describes the current status of freshwater fish diversity in the Budhikhola which is an important branch of the Karnali River that runs through the western region of the Bardiya district covering about 30 km distance in the north-south direction. To examine the effects of irrigation dams on habitat modification and fish variety, fish were collected from the entire Budhikhola stretch, with four sampling stations established depending on habitat structure. The freshwater system of the Budhikhola harbors a diverse and ecologically complex fish community comprising 41 species from 6 orders and 13 families. The dominance of the Cyprinidae family, represented by Barilius barna, Chanda nama, Chagunius chagunio, etc., highlights its ecological significance. On the other hand, the loss of important fish species is proof that the building of irrigation dams has had significant ecological effects. Human-induced hazards such as damming and overexploitation, have adversely impacted the river environment, resulting in reduced water depth, habitat structure changes, and restricted nutrient flow. The majority of the riverbed had been observed to be silt-covered. Significant fish species loss indicates ecological instability brought on by human activity. Changes in the distribution of fish sizes and spatial differences between upstream and downstream areas highlight the complex link between habitat modifications and community functioning. The catch-per-hour seasonal tendency, which peaks in September and falls in March, is correlated with fishing patterns, environmental factors, or breeding seasons. The evenness value (0.96) and high Shannon-Weiner Diversity Index (H'= 3.57) show a diverse and harmonious fish community. The relevance of family-level distinctions in implementing effective conservation and management measures is highlighted by major differences among family groups (p<0.001). As the findings make clear, the long-term survival of the diversified fish ecosystem of the Budhikhola depends on addressing and reducing anthropogenic stressors. This study provides valuable insights for informed conservation efforts in the aquatic ecosystems of Nepal.

show abstract

An Impact Assessment of Betani Irrigation Dam on Fish Diversity of Damak Municipality, Jhapa, Nepal

Cited by 9 publications

References 12 publications

Investigation on Ichthyofaunal Assortment and Water Quality Parameters in the Ranganadi River of North-East India

Investigation on Ichthyofaunal Assortment and Water Quality Parameters in the Ranganadi River of North-East India

Functional diversity in reef fish assemblages in the Parque Nacional Sistema Arrecifal Veracruzano, Mexico: Temporal and spatial changes

Impact of Irrigation Dams on Fish Diversity of Budhikhola in Bardiya, Lumbini Province of Nepal

Contact Info

Product

Resources

About