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Water Quality Assessment of Some Selected Hatcheries at Shambhuganj Mymensingh

M. A. Mou
Department of Environmental Science, Bangladesh Agricultural University, Mymensingh-2202

R. Khatun*
Department of Environmental Science, Bangladesh Agricultural University, Mymensingh-2202

M. A. Farukh
Department of Environmental Science, Bangladesh Agricultural University, Mymensingh-2202

Abstract/ Executive Summary:

The study was conducted to investigate the physico-chemical parameters and heavy metals content of water in some selected hatcheries at Shambhuganj, Mymensingh. The water samples were collected from seven selected hatcheries during March to April 2019 to examine temperature, EC, TDS, DO, BOD, pH, ammonia, NO₃-, PO₄2- and heavy metals (Cr, Cd, Pb and Ni). The values of temperature, pH, DO, BOD, EC, TDS and ammonia were 28.5 °C, 7.9 to 8.4, 6.8 to 7.8 mg L^-1, 0.1 to 0.9 mg L^-1, 231.5 to 307.2 µS cm^-1, 146 to 200 mg L^-1 and 0.04 to o.06 mg L^-1, respectively in the studied hatcheries. The NO_3- and PO42- content ranged from 0.48 to 0.68 mg L^-1 and 0.45 to 0.63 mg L^-1, respectively. Among the heavy metals, Pb was found in 5 hatcheries but the values were within the permissible limit. Other heavy metals (Cr, Cd and Ni) were not found in the studied hatcheries. The fish production of the selected hatcheries ranged from 4 to 9 metric ton. The study results revealed that all of the investigated parameters were within the permissible limit and water quality of selected hatcheries was suitable for fish culture.

Keywords: Anionic properties, Fish production, Heavy metals, Physico-chemical properties

Location: Shambhuganj, Sadar Upazilla, Mymensingh

Start Date: 00-03-2019

End Date: 00-04-2019

Program Area: Animal Health and Management

Commodity: Water quality

Objectives:

1) examine the physicochemical properties of water at selected hatcheries and 2) to assess the fish production status of the selected hatcheries.

Methodology:

Study area The study area is located at Shambhuganj, Sadar Upazilla, Mymensingh. It is situated on the other side of the Brahmaputra, connected by the Shambhuganj Bridge and located at the latitude of 24º45´36.18´´ N and the of longitude 90º26´58.29´´ E. Water sample collection and analysis The water samples were collected from seven hatcheries: Mukti (H-1), Boishakhi (H-2), Ma (H-3), Brahmaputra (H-4), Ayat (H-5), Vai-Vai (H-6) and Anudan (H-7) during the period from March 2019 to April 2019. Around 500 ml water was collected by pre-prepared sampling bottles from 10 cm below the surface water at 3 locations of each hatchery. Finally, a composite sample was prepared for each hatchery for the analysis of temperature, pH, dissolved oxygen (DO), biochemical oxygen demand (BOD), electrical conductivity (EC), total dissolved solid (TDS), ammonia, nitrate (NO3-), phosphate (PO42-) and heavy metals (Cr, Cd, Pb and Ni). Temperature was measured by a Celsius thermometer; pH, EC, TDS and DO was determined by digital pH meter (Model: pH scan WP 1, 2, Malaysia), EC meter (Model: HM digital, Germany); TDS meter (Model: HM digital, Germany) and DO meter (Model-D, 46974, Taiwan), respectively just after the collection of water samples. The BOD was calculated by: BOD (ppm) = (DO0-DO5), where, DO0= Initial DO in the sample, and DO5= DO after 5 days. Ammonia was examined by the method of Harwood and Kuhn (1970). Nitrate (NO3-) was determined by phenoldisulphonic acid method according to the procedure of Ward et al. (1996). Phosphate (PO42-) was investigated spectrophotometrically by stannous chloride method following the procedure cited by APHA (1995). Heavy metals (Cr, Cd, Pb and Ni) were analyzed using Atomic Absorption Spectrophotometer according to standard methods. Ammonia, NO3- and PO42- were investigated in the Laboratory of the Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh and the heavy metals were analyzed in Interdisciplinary Institute for Food Security (IIFS), Bangladesh Agricultural University, Mymensingh. Microsoft office excel 2010 software was used for data analysis and presentation.

Source of Information: J. Environ. Sci. & Natural Resources, 11(1&2):235-240, 2018 ISSN 1999-7361

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Among the heavy metals (Cd, Cr, Ni and Pb), only Pb was present in minimal amount in five hatcheries that did not hamper the water quality and fish production. Fish production largely depends on water quality as well as size of pond. Usually, fish production increases with the increase of pond size if the water quality parameters are suitable. All the water quality parameters of the studied hatcheries were suitable for fish production and consequently positive correlation was found between the pond size and fish production. Cuenco et al. (1985) stated the effects of interactions among pond size, temperature, dissolved oxygen, unionized ammonia and food on growth of individual fish. They also found a positive correlation between pond size and fish growth.

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