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Observation and Comparison of Physico-chemical Characteristics in Carp Rearing Ponds Under Two Treatments

Z. F. Ahmed
Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh.

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

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

M. A. H. Miah
Discipline, Khulna University, Khulna, Bangladesh.

M. E. Azim
Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh.

Abstract/ Executive Summary:

Physico-chemical characteristics were observed in carp rearing ponds at Bangladesh Agricultural University, Mymensingh, Bangladesh under two different treatments. Mean values of temperature, Secchi depth, dissolved oxygen, pH, chlorophyll-a, total alkalinity, nitrate nitrogen, ammonia nitrogen and phosphate phosphorous were 29.8°C. 35.83 cm, 5.17 mgl^-1, 7.07, 13.1 mgl^-1, 32.5 mgl^-1, 1.93 mg^-1, 0.05mg^-1 and 1.19 mgl^-1, respectively over the experimental period. All the measured water quality parameters varied little among the ponds and no discernible trends were apparent in either or between pond conditions.

Keywords: Physico-chemical characteristics, Carp, Rearing pond

Location: Department of Aquaculture and Management, Bangladesh Agricultural University, Mymensingh, Bangladesh

Start Date:

End Date:

Program Area: Farming System

Commodity: Carp fish

Objectives:

To investigate several physico-chemical characteristics considered important for fish culture.

Methodology:

Trials were conducted at ponds owned by Department of Aquaculture and Management, Bangladesh Agricultural University, Mymensingh, Bangladesh. Six ponds each having surface area of 0.01 hectare and depth of 1.5 meter were used. The ponds numbered arbitrarily as 1, 2, .. , and 6 were randomly divided into two sets for two different treatments. One set was treated with only fertilizers and the other with both fertilizers and supplementary feed. All ponds were fertilized with urea. triple super phosphate, murate of potash and mustard oil cake at the prevalent standard rate 20 days before and only urea and TSP 15 days after stocking of fish. Only ponds 2, 4 and 6 were supplementary fed with mustard oil cake daily. Six hundred each of one month old fry of catla, catla catla and rohu, Labeo rohita were transferred from the faculty nursery to each pond at 1000h. Monitoring of water temperature, Secchi disc depth. pH and dissolved oxygen were done daily between 0900 and 1000h on the spot. Total alkalinity. nitrate nitrogen, ammonia nitrogen, phosphate phosphorous, chlorophyll-a analyses were made on depth-integrated water samples taken from each pond every 4 days. Dissolved oxygen and pH were measured directly by a digital DO meter and a digital pH meter respectively. Secchi disc value was determined using a Secchi disc. Alkalinity was titrated, and measurement of ammonia, nitrate and phosphate was carried out by a Hach Kit (DR/2,000, direct reading. spectrophotometer). One-way Analysis of Variance (ANOVA) and Multiple Range Test were performed on the data as recorded for each parameter to compare the difference between fertilized, and fertilized and fed ponds using a IBM personal computer.

Source of Information: Pakistan Journal of Biological Sciences 3 (10): 1781-1783,2000

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 80000/-

Total Budget (Tk.) :

Achievement/Findings:

It was evident that there was no discernible trend in each water quality parameter of both fertilized, and fertilized and fed ponds during the experimental period. Water quality was recommended within the acceptable ranges for all parameters for fish culture. One-way Analysis of Variance and Multiple Range Test performed on the data as recorded for each parameter illustrated that there was no significant difference between fertilized, and fertilized and fed ponds at 95% confidence level.

Knowledge Management: Journal