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Zooplankton in a Managed Pond in Rajshahi, Bangladesh

Keya Renu Roy
Department of Botany, Govt. Victoria College, Narail, Bangladesh

A. B. M. Wohidul Islam
Department of Botany, Govt. B.L. College, Daulatpur, Khulna, Bangladesh

Md. Abdul Mannan Khan
Department of Botany, Bangobhondhu College, Sonamukhi Kazipur, Sirajgong, Bangladesh

Md. Mujibor Rahman*
Environmental Science Discipline, Khulna University, Khulna, Bangladesh

M. Zaman
Department of Botany, Rajshahi University, Rajshahi-6205, Bangladesh

Abstract/ Executive Summary:

Twenty-one genera of zooplankton were studied based on one year investigation of which 3 genera belonged to Cladocera (19.22%), 5 to Copepoda (36.13%) 12 to Rotifera (44.59%) and 1 to Ostracoda (0.06%).

Keywords: Plankton, Taxonomy, Diversity, Growth, Development, Periodicity

Location: Rajshahi, Bangladesh

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Plankton, Pond

Objectives:

The plankton is regards as major index to compare the relative fertility and the fishery potential of different waters (Prasad, 1969). Islam et al. (2007), Begum et al. (1996), Chowdhury et al. (1989), Ali et al. (1985), Bhouyain et al. (1983), Ali et al. (1982), Das and Bhouyain (1981), Das and Das (1980), Islam and Aziz (1975) and Das and Bhouyain (1974) studied various aspects of zooplankton of Bangladesh. But a total list of zooplankton from diverse habitats of Bangladesh is yet far from complete. The authors made an attempted to study the physical, chemical, soil and biological condition, as well as their inter relationship and effect on the diversity, growth, and periodicity of plankton in a managed pond in Rajshahi, Bangladesh.

Methodology:

The study was carried for a year in a rectangular pond. It has an area 3762 M2 with an average depth 2.68 M. The pond receives waste water discharged (washing, bathing etc.) from near by dormitory. Retenon (insecticide), Lime, Urea, TSP (75kg/ hac) and light organic manure (Mustered, oil cake, rice bran etc.) were applied in the pond. Dipterex was sprayed to kill insects and other periphyton and Aqua-nourish (silica powder) to prevent diseases of fish.

Plankton samples were collected in monthly intervals thrice a day (morning, midday and afternoon) on each sampling date round the year. The plankton was collected by plankton net of no. 20 silk bolting cloth. 75 litres of water was passed through the plankton net with the help of a plastic pan of 5 litre capacity. The water was passed down the net and the plankton was collected into a glass test tube fixed firmly at the lower end of the plankton net (Welch 1948). After collection the plankton materials were transferred to glass bottles and preserved permanently in Transeaus solution (Transeau 1951). The quantitative enumeration of the zooplankton were carried out with the help of a Sedgwick Rafter counting cell and by drop method (Welch 1948). The abundance was expressed as units per litre (units l-1) and figures of Zooplankton members were drowned by the help of camera lucida.

Source of Information: Khulna University Studies, 9(1): 91-100, 2008

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The plankton considered to be the best index of the biological productivity and the nature of aquatic habitat. In fish pond not only the production of plankton but also the right type of plankton production is very much essential for the successful rearing of the fish. To know water quality and to do pisciculture research on plankton is very important. Present study was such an attempt to know the taxonomy, abundance and periodicity of Zooplankton. By Such more study we will be able to make a complete list of zooplankton of Bangladesh as well as their impact on water quality and pisciculture.

Knowledge Management: Journal