Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Natural Food Abundance and Sis Biodiversity of Matshaya Rani Fish Sanctuary

M. A. N. G. M. Hasan
Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh

N. S. Lucky
Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh

M. A. R. Hossain
Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

An investigation was carried out in the Matshaya Rani (fish queen) Fish sanctuary to evaluate the hydrographic status, natural food and SIS (small indigenous species) abundance in the old Brahmaputra River near the BAU campus. There were three treatment sites- inside sanctuary, upstream and downstream of the sanctuary named as treatments T₁, T₂ and T₃, respectively. A number of water quality parameters such as temperature (0C), transparency (cm), depth (cm), water velocity (m sec^-1), pH, dissolved oxygen (mg l^-1), conductivity (μs cm^-1), TDS (mg l^-1), alkalinity (mg l^-1), phosphate-phosphorus (mg l^-1), nitratenitrogen (mg l^-1), ammonia-nitrogen (mg l^-1) and chlorophyll-a (μg l^-1) were recorded and were found within the suitable range for natural food and SIS in different treatments. Among all the water quality parameters, only water transparency and depth showed significant difference (P < 0.05) among the treatments. Forty three genera of phytoplankton belonging to Bacillariophyceae (10), Chlorophyceae (22), Cyanophyceae (8), and Euglenophyceae (3) and nine genera of zooplankton were identified belonging to Rotifera (4) and Crustacea (5) in all the treatments. None of plankton group except Cyanophyceae and Rotifera showed significant difference (p < 0.05) among the treatments. Thirty two species of SIS under ten groups were found in different treatments. The highest number of species was found in treatment T₁ (30) followed by T₂ (25) and T₃ (24). The catfishes, loaches and minnows dominated among thirty two species caught from the sampling sites. The highest numbers of species were found in April and May and the least species were found the month of January. Significant inter month and inter site variation (P < 0.05) in numerical abundance of fish observed in the study area. Notable endangered fishes, Kanchan puti- (Puntius conchonius), Balichata (Acanthocobitis botia), Indian torrent catfish-Amblyceps mangois and Chaka- (Chaca chaca) species were only found in Matshaya Rani Fish sanctuary. The natural food abundance and SIS diversity were significantly more in the inside of Matshaya Rani Fish sanctuary than both the upstream and downstream of the sanctuary.

Keywords: Conservation, Endangered fish, Fish biodiversity, Pollution

Location: Brahmaputra River near the BAU campus

Start Date: 00-01-2008

End Date: 00-05-2008

Program Area: Conservation and Biodiversity

Commodity: Plankton

Objectives:

1. To evaluate the hydrographic status, natural food and SIS abundance in the Matshaya Rani Fish sanctuary and compared with the same parameters upstream and downstream of the sanctuary.

Methodology:

The study was conducted for a period of five months, from January to May in Matshaya Rani Fish sanctuary which was established on 1 January 2008 in a section of the river old Brahmaputra beside the BAU campus under Mymensingh district. The sanctuary area is about 200 m × 25 m, and the water depth increases up to 9.14 m to 15.24 m during the monsoon months and goes down to 3.04 m in the dry months. For the present study, three treatments were used namely, Matshaya Rani fish sanctuary for treatment (T₁), upstream of the river (1 km distance from the sanctuary) as treatment (T₂) and downstream of the river (1 km distance from the sanctuary) as treatment (T₃) having three replicates of each treatments. A number of water quality parameters such as temperature (°C), transparency (cm ), depth(cm), water velocity(m/s), pH, dissolved oxygen (mg/l), conductivity (μs/cm), TDS (mg/l), alkalinity (mg/l), phosphate-phosphorus (mg/l), nitrate-nitrogen (mg/l), ammonia-nitrogen (mg/l) and chlorophyll-a (μg/l) were recorded monthly. Temperature (⁰C), transparency (cm), pH and dissolved oxygen (mg/l) were measured on the spot and rests of the above parameters were measured at the Water Quality and Pond Dynamics Laboratory in the Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh. Plankton samples were collected monthly from each treatment. Twenty liters of water sample was taken from different places and depths of the river and passed through fine (25 μ) mesh plankton net. Filtered samples was taken into a measuring cylinder and carefully made up to a standard volume of 50 ml. Then the collected plankton samples were preserved in 5% buffered formalin in small plastic bottles each for subsequent studies. From each 50 ml preserved sample, 1 ml sub-sample was examined by using a Sedge Wick-Rafter cell (SR cell) and a binocular microscope (Olympus CH-40) with phase contrast facilities. One ml of sub sample was transferred to the S-R cell and then all planktonic organisms present in 10 squares of the cell chosen randomly were identified and counted. Plankton identification was performed following APHA. The quantitative estimation of plankton was done. Fish samples were collected monthly from the three treatments of the Matshaya Rani. For the collection of fish samples a bamboo made fishing trap, locally called ‘Ucha’ with 9 feet length and 7 feet wide and a mesh size of 2- 4 mm was used. Three Ucha were set inside the sanctuary and three Ucha were set in the river at the upstream and downstream of the sanctuary each. Every month, the individual length and weight of the collected fishes was measured by using a measurement scale and a digital electronic balance (KERN, Model No. EMB 2000-0), respectively. The morphometric characteristics of each sample were also observed to identify the fish species. Total numbers of each collected species were counted and then released carefully into the sanctuary. Fish samples were also collected from 1 km distance in both sides of the sanctuary (up and down) to understand the monthly fluctuation in fish catch.

Source of Information: J. Environ. Sci. & Natural Resources, 5(1): 319-328, 2012; ISSN 1999-7361

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The present study revealed that the qualitative and quantitative SIS diversity and natural food abundance inside the Matshyarani fish sanctuary were significantly more than both the upstream and downstream of the sanctuary. Sanctuary is an important fisheries management tool is used worldwide for the conservation, protection and restoration of fish species.

Knowledge Management: Journal