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

Qualitative and Quantitative Analysis of Phytoplankton in Culture Pond of Noakhali District, Bangladesh

Sharmin Akter
Department of Fisheries and Marine Science, Noakhali Science and Technology University, Noakhali-3814, Bangladesh

Md. Mofizur Rahman
Department of Fisheries and Marine Science, Noakhali Science and Technology University, Noakhali-3814, Bangladesh

Al Faruk
Department of Fisheries and Marine Science, Noakhali Science and Technology University, Noakhali-3814, Bangladesh

Md. Nurul Mahmud Bhuiyan
Department of Fisheries Biology and Genetics, Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Amir Hossain
Department of Fisheries and Marine Science, Noakhali Science and Technology University, Noakhali-3814, Bangladesh

Abdulla-Al-Asif
Department of Fisheries and Marine Bioscience, Faculty of Biological Science and Technology, Jessore University of Science and Technology, Jessore-7408, Bangladesh

Abstract/ Executive Summary:

A study was conducted on qualitative and quantitative analysis of phytoplankton in cultured ponds of two fish farms of Noakhali district, Bangladesh from 15 September to 15 November 2012 to identify and estimate the abundance of phytoplankton in various culture ponds of two fish farms. Analyses of phytoplankton samples recorded a total of 4 classes phytoplankton viz.; Bacillariophyceae, Chlorophyceae, Cyanophyceae, Euglenophyceae. Out of 21 phytoplankton genera identified, 5 belong to Cyanophyceae, 7 to Chlorophyceae, 5 to Bacillariophyceae and 4 to Euglenophyceae. Among the identified genera, Euglena, Microcystis, Eurolenawere found to be dominant genera. Total phytoplankton abundance was varied from 36×105cells/L to 94.92×105cells/L in the experimental ponds. Among all experimental ponds, Chlorophyceae was found dominant (44.4×105cells/L). Second dominant group was Euglenophyceae (39.6×105cells/L) observed in pond-1 of Bismillah Agro Production (BAP). Total phytoplankton densities were recorded 47.82×105cells/L and 51×105 cells/L in pond-1 and pond-2 of Subarna Agro-Based Initiative (SABI) respectively. In BAP, total phytoplankton densities were recorded 94.92×105cells/L and 36×105cells/L in pond-1 and pond-2 respectively. Management technique and water quality parameters were also studied during the study period namely water temperature, conductivity, salinity, transparency, dissolved oxygen and pH. The present study reveals that phytoplankton species are variable among the culture ponds and their density is also variable. The information provides for more research to compare water quality and pond phytoplankton characteristics in earthen aquaculture systems with and without fish stocking. Further studies on the seasonal changes of water quality parameters and their effects on phytoplankton production in the fish ponds and all year extended monitoring is recommended in future studies.

Keywords: Bangladesh, Phytoplankton, Fish culture pond, Physico-chemical parameters

Location: Noakhali district, Bangladesh

Start Date: 15-09-2012

End Date: 15-11-2012

Program Area: Socio-economic and Policy

Commodity: Plankton

Objectives:

The study was conducted for understanding the nutritive quality of the pond water in order to assess its suitability for inland aquaculture of fishes.

Methodology:

2.1 The experimental site and periods: The study was conducted in four culture ponds of two fish farms situated in Subarno Agro-Based Initiative (SABI) and Bismillah Agro Production (BAP) in the Sonapur region of Noakhali district, Bangladesh. Sampling was conducted over a 3-months period from 15 September to 15 November 2012. Two ponds (pond-1 and pond-2) of SABI were used as a culture pond and nursery pond of mainly mono sex tilapia with white fish respectively and two ponds (pond-1and pond-2) of BAP were also used as a nursery pond of mono sex tilapia with white fish and only mono sex tilapia respectively. The groundwater is the main source of water for these ponds. These ponds were well protected from the entrance of surface runoff. These ponds were managed by lime, fertilizer, cow dung, zeolite, etc. 2.2 Phytoplankton sampling and analysisPlankton samples were collected using plankton net (25 μm mesh size) and fixed in 5% formalin on site. Identification of the phytoplankton species was conducted under a phase contrast light microscope at 16×40 and 16×10 magnification (Model No: XSZ21-05DN, Made in China) with bright field and phase contrast illumination. Quantitative analyses of Phytoplankton were done on Sedgewick-R after counting chamber (S-R cell). Analyses involved the transfer of 1 mL sub-sample from each of the samples to the Sedgewick-Rafter counter and counting of cells within 10 squares of the cells, chosen randomly. The cell counts were used to compute the cell density using the Striling (1985) formula where the plankton density is estimated by-N= (A×1000×C)/ (V×F×L) Where, N=no. Of plankton cells or units per liter of original waterA=Total no of plankton counted.C=Volume of final concentrate of the sample in ml.V=volume of a field in cubic mm.F=No. Of fields counted.L=Volume of original water in liter. The phytoplankton was then identified up to the genus level and enumerated by the following (APHA, 1992; Bellinger, 1992). The mean number of phytoplankton was recorded and expressed numerically per liter of water of the pond.2.3 Water quality analysis surface water samples were collected once a month between 10:00 and 11:00 hours for analysis of various Physico-chemical parameters using dark bottles. Water temperature was measured on-site using a mercury thermometer. Physico-chemical parameters including pH, salinity, and conductivity were determined using a portable meter. Dissolve oxygen (DO) was estimated by the dissolved oxygen test kit. Transparency was measured using a Secchi disc at two depths (disappearing, reappearing) using a black and white standard color-coded disc.2.4 Statistical analysis graphs and tables were represented in Microsoft excel. Microsoft Excel 2007 was used to plot graphs for dissemination of the results.

Source of Information: International Journal of Fisheries and Aquatic Studies 2018; 6(4): 371-375

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

A detailed description of the dynamics of phytoplankton within these ponds hasn’t been given in this study since the samples only cover a period of 3 months. Hence there is a need to carry out successive studies to look at the dynamics of the plankton groups within the culture ponds sampled over several years in order to fully characterize the variations both due to water quality and variability in climatic conditions. This information is useful for future research as a foundation study towards characterization of these dynamics within the culture ponds of the Noakhali, Bangladesh.

Knowledge Management: Journal