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Water Quality Parameters of Coastal Shrimp Farms from Southwest and Southeast Regions of Bangladesh

M.S. Islam
Bangladesh Fisheries Research Institute, Brackishwater Station, Paikgacha, Khulna 9280

A.H.M. Mustafa Kamal
Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

M.A. Wahab
Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

S. Dewan
Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Abstract/ Executive Summary:

The impacts of shrimp farming on water quality and effluent loading of shrimp farms in southwest (Khulna) and southeast (Cox's Bazar) regions of Bangladesh was investigated during March-August and August-October season, respectively. Water salinity fluctuated from 3.0 to 15.0 ppt in the southwest, whereas it was between 2.5 to 20.0 ppt. in southeast region. Total ammonia nitrogen as recorded in most farms of Cox's Bazar region was higher (0. 1160.438 mg/L) than the recommended level of shrimp farming. Mean values of total ammonia nitrogen and total nitrogen at the outlet of shrimp farms were higher than those of inlet in both regions. Mean values of phosphate phosphorus and total phosphorus at outlet were lower than inlet except in harvest time of Penaeus monodon. Total suspended solids were deposited on the bottom of shrimp farms in both regions, which resulted in higher concentration in inlets than outlets in both regions.

Keywords: Penaeus monodon, Shrimp farm, TSS, Total nitrogen, Total phosphorus

Location: Cox's Bazar. Bangladesh

Start Date: 00-00-2002

End Date: 00-00-2002

Program Area: Animal Health and Management

Commodity: Shrimp

Objectives:

To understand the nature of changes take place in water quality over time and the quantity of effluent discharge especially total N, total P and TSS into the environment.

Methodology:

Study area: Five shrimp farms such as Saral, Alamdanga, Roadanga, Charmulai and Soladana in Southwest Khulna and farm nos. 1, 2, 3, 4 and Beximco in Southeast Cox's ?Bazar areas were selected for this study. All shrimp farms in Khulna area are fed by the Shibsa river and in Cox's Bazar areas by the Bakkhali river. The farms were all different in areas and most of these have only one channel for both intake and drainage. Water quality parameters analysis: Water samples were collected monthly from 4 selected ghers (impoundment) of each region to estimate the water quality parameters. Four ghers were used to conduct routine sampling. The routine sampling involved collection of water samples from three spots inside each farm along with those taken from inlet. The water quality parameters recorded and methods used for this study

Source of Information: Bangladesh J. Fish. Res., 8(1), 2004: 53-60

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Mean values of total ammonia nitrogen and total nitrogen at the outlet of shrimp farms were higher than those of inlet in both regions. Mean values of phosphate phosphorus and total phosphorus at outlet were lower than inlet except in harvest time of Penaeus monodon. Total suspended solids were deposited on the bottom of shrimp farms in both regions, which resulted in higher concentration in inlets than outlets in both regions.

Knowledge Management: Journal