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Effect of Climate Change on the Ecology and Biodiversity of Inland Open Water Fishes

Tayfa Ahmed
Senior Scientific Officer
Riverine Station, Bangladesh Fisheries Research Institute

Abstract/ Executive Summary:

Ten sampling sites in the River Meghna (from upper to lower) and two in Tentulia river with GPS points were selected on the basis of field survey, salinity data, focus group discussion and sharing knowledge with experts. Salinity was found mainly in the samplig spots of lower Meghna river such as Ludhua, Alexander and Ramgoti during the study period. Highest level of salinity was found at Ramgoti in February. It is due to the strong tidal action of sea. Data on availability of fish species were collected by interviewing and visiting fisher and fish market. In the study period 24 fish species were found in the selected sites of the River Meghna and 18 in Tentulia River. Based on observation, no fish species has yet disappeared from the river but amount of catch is decreasing day by day.

Keywords: Climate change, Meghna river, Salinity intrusion

Location: River Meghna, Bangladesh

Start Date:

End Date:

Program Area: Variety and Species

Commodity: Fisheries diversity

Objectives:

To study the effects of climatic factors and their associated events on the riverine ecology and biodiversity of fish
To develop a salinity intrusion map for the river Meghna, lower Meghna, Tentulia, and Agunmukha describing the potential impacts on riverine ecology and fish biodiversity

Methodology:

The study was carried out in the river Meghna, lower Meghna, Tentulia river and Agunmukha river. Data was collected from previously selected twelve sampling points of Meghna and Lower Meghna river and two sampling points (Dhulia, Bauphal and Kalia, Dashmina) of Tentulia river and two new sampling points of Agunmuka river (Baliajhuri Feri Ghat & Mohipur point) on monthly basis.Salinity, water quality parameters, fish availability were measured and recorded in each of the sampling points.Historical calamity data and their effects on ecology/fish were collected by Interviewing, PRA, FGD, Literature review (GOB, NGO, UN, University reports etc.). Patterns of salinity intrusion in the river Meghna, lower Meghna and Tentulia wias measured by refractometer/electric conductivity meter on monthly basis.

Source of Information: Annual Report 2017-19. 232 p.

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 21,00,000

Total Budget (Tk.) : NaN

Achievement/Findings:

Ten sampling sites in the River Meghna (from upper to lower) and two in Tentulia river with GPS points were selected on the basis of field survey, salinity data, focus group discussion and sharing knowledge with experts. Salinity was found mainly in the samplig spots of lower Meghna river such as Ludhua, Alexander and Ramgoti during the study period. Highest level of salinity was found at Ramgoti in February. It is due to the strong tidal action of sea. Data on availability of fish species were collected by interviewing and visiting fisher and fish market. In the study period 24 fish species were found in the selected sites of the River Meghna and 18 in Tentulia River. Based on observation, no fish species has yet disappeared from the river but amount of catch is decreasing day by day.

Knowledge Management: Report/Proceedings