Status of Fisheries Resources and Water Quality of Tanguar Haor

Abstract

Abstract:The study was conducted to observe the status of fisheries resource of Tanguar haor, one of the large wetland in the north eastern part of Bangladesh. For this purpose the whole study was completed in two parts: interviewing with local people and analyzing the water quality. Indiscriminate harvesting of mother fishes, use of agrochemicals, sedimentation on haor basin and habitat destruction were found as major causes of fisheries resources degradation in the study area. Most of the water quality parameters were found good which were within the standard level set by Government of Bangladesh for fisheries. However, EC and TDS were found higher than the recommended level for fish production.

Status and economic valuation of ecosystem services of Tanguar haor: A wetland of Bangladesh

“…The water temperature among all the sampling stations of Tanguar haor ranged from 27.2°C to 29.4°C with a mean value of 28.28°C. Similar mean value of temperature (27.98°C) was found by Mamun et al (2013) from Tanguar haor water. Average pH of the water samples ranged from 7.3 to 8.7.…”

“…Averages DO of the water sample ranged from 4.27 mg L −1 to 8.56 mg L −1 . But Mamun et al (2013) found the highest DO value was 5.5 mg L −1 at Majampur and the lowest value was 4.5 mg L −1 at Hoirakuna. Normal TDS of the water samples ranged from 731 to 1020 mg L −1 .…”

“…Normal TDS of the water samples ranged from 731 to 1020 mg L −1 . The highest TDS value was 1036 mg L −1 at Lamagau beel and the lowest value was 670 mg L −1 at Lamagau (Mamun et al, 2013). The higher TDS value of water may be due to the high contents of dissolved ions in water that flows from upstream, nearby agricultural land and domestic materials.…”

“…Different valid economic valuation of this wetland services might be helpful for sustainable management. In addition, many underlying causes those are potential for the depletion of ecosystem services like population pressure, land use change, over exploitation, climate change and water & soil quality loss (Haque, 2012;Mamun et al, 2013;Nahar, 2013;Morshed, 2013). Nowadays, wetland services are highly vulnerable due to natural and anthropogenic causes and decreasing day by day (Nahar, 2013;Morshed, 2013).…”

Phytoplankton flora of Tanguar Haor ecosystem of Bangladesh: Chlorophyta

“…Recently, Bhuiyan et al (2017) reported the mean concentration of soluble reactive phosphorus (SRP) for the Haor as 16.3 μg/l and nitrate-nitrogen as 180 μg/l. Mamun et al (2013) reported water temperature, pH and dissolved oxygen (DO) as 28.0°C, 7.32 and 5.03 mg/l, respectively which is quite consistent with the findings of Bhuiyan et al (2017). The water of Tanguar Haor could be classified as alkaline with moderate concentrations of SRP and nitrate-nitrogen.…”