Seasonal variation and community structure of fishes in the Mahananda River with special reference to conservation issues

Galib, Shams Muhammad; Rashid, Md. Abdur; Chaki, Nipa; Mohsin, Abm; Joadder, Md. Abdur Razzaq

doi:10.17017/j.fish.110

Cited by 6 publications

(1 citation statement)

References 5 publications

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“…Based on the abundance of fish species, India is having one of the most diversified and the largest natural resources in the world (Vivekanandan 2013;Mohanty et al 2015). The information on the abundance and diversity of the fish species is the main obligatory for management policy (Chaki et al 2014;Galib 2015;Galib et al 2016). The diversity of any natural community partially depends on the conditions of the environment and unfortunately, interferences of anthropogenic activities are diminishing the living resources due to degradation of coastal habitats affecting the fish diversity (Chowdhury et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Abundance study of fish species from Hel River of Kokrajhar, Assam, India

Sarkar¹,

Das

Basumatary

2022

J Fish

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Hel River is an important river of Kokrajhar district of Assam, India, which is a great source of freshwater fish. Considering the availability of indigenous fish species in Hel River and consumption of these species by the local people, the prime objective of this study was to study the fishes in the river. The relative abundance of fishes along with the species richness and species evenness were calculated based on fish samplings from August 2014 to July 2015. A total of 1313 individuals belonging to 25 species were recorded, dominated by family Cyprinidae with nine species. The highest relative abundance was recorded for Barilius bendelisis (15.31%) followed by Garra gotyla (14.09%) and Barilius barna (13.78%). This study may serve as an important baseline for sustainable management of Hel River.

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Section: Introductionmentioning

confidence: 99%

Abundance study of fish species from Hel River of Kokrajhar, Assam, India

Sarkar¹,

Das

Basumatary

2022

J Fish

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Is current floodplain management a cause for concern for fish and bird conservation in Bangladesh's largest wetland?

Galib

Lucas

Chaki

et al. 2018

Aquatic Conservation

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1. Worldwide, water regulatory structures have impacts on aquatic ecological connectivity. This study determined the effects of current sluice management on the fish community in the Baral River, a major connection to the largest wetland (Chalan Beel) in Bangladesh. It also examines wider problems for biodiversity conservation (particularly waterbirds) in that wetland, which has shrunk to 30% of its former dry-season size in 50 years. 2. During the flood period, the peak breeding time for native floodplain fishes, sluices were in undershot operation (open by 16-60% of water depth). During this time, fish abundance and species richness were 229% and 155% higher respectively at sites upstream of the sluices, despite similar habitat upstream and downstream. Outside this period, when sluices were fully open, abundance and species richness were similar upstream and downstream. 3. Fish samples were dominated by fry, which are susceptible to damage by sluices. Twenty (41.7%) of 48 fish species captured in this study are classed as threatened in Bangladesh and their abundance was significantly lower downstream of the sluices. Two alien species, Aristichthys nobilis and Hypophthalmichthys molitrix, were recorded, probably escapees from local aquaculture activities.4. Twenty-five species of wetland birds were recorded in the Chalan Beel. From interviews, 64% of these species appear to have decreased in the last 20 years, together with 11 more species that may have become locally extinct over this period. This suggests that widespread ecological disruption is occurring. 5. Improved water management (e.g. gate opening height and duration) or modification (e.g. fish pass) of the Baral sluices is needed, to meet biodiversity and fisheries needs, rather than just for flood control and crop production. Improved hydrological and ecological connectivity and habitat protection are needed, as are a cessation of destructive fishing and seasonal fish ranching practices that currently provide synergistic pressures.

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