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

Impact of Fish Population Density on Growth and Production of Sarpunti, Mrigal and Tilapia in Polyculture System

S. N. Chowdhury
Department of Fisheries Management, BAU, Mymensingh

M. Paul
BFRI, Freshwater station, Mymensingh;

A. C. Barman
BFRI, Freshwater station, Mymensingh;

A. Bhadra
BFRI, Headquaters, Mymensingh

M. S. Rahman
Department of Fisheries Management, BAU, Mymensingh

Abstract/ Executive Summary:

An experiment was conducted to determine the impacts of fish population density on the growth and production of sarpunti (Barbonemus gonionotus), mrigal (Cirrhinus mrigala) and tilapia (Oreochromis niloticus) in polyculture system for a period of 90 days in six earthen pond .The experiment was carried out under three treatments each with two replications. The stocking density was 50 fish per decimal (sarpunti 20, mrigal 20 and tilapia 10) under treatment-I, 75 fish per decimal (sarpunti 30, mrigal 30 and tilapia 15) under treatment-II and 150 fish per decimal (sarpunti 60, mrigal 60 and tilapia 30) under treatment- III and all the ponds under three treatments supplementary feed was not used. The average initial length and weight of the fingerlings of sarpunti, mrigal and tilapia were 13.29 cm, 12.80 cm, 4.55cm and 22.7g, 23.75g and 3.84 g respectively. The ponds were fertilized fortnightly with cowdung, urea and TSP at the rates of 5 kg, 100 g and 200g per decimal, respectively. Mean survival rates of fish under treatment-I, treatment-II and treatment-III were 87.50%, 88.16% and 81.30% respectively. The specific growth rates (SGR, % per day) of fish under treatment-I, treatment-II and treatment-III were 1.13%, 1.03% and 0.80%. The calculated net fish production of the ponds under treatment-I was 1.61 ton/ha/yr and that of the ponds under treatment-II was 1.97 ton/ha/yr and 2.5 ton/ha/yr in treatment-III.

Keywords: Mrigal, Tilapia, Sarpunti, Fingerlings, Cowdung.

Location: BFRI, Freshwater station, Mymensingh

Start Date: 00-08-2012

End Date: 00-11-2012

Program Area: Animal Health and Management

Commodity: Tilapia

Objectives:

1. To determine the effects of fish population density on the growth and production of sarpunti, mrigal and tilapia under three treatments in polyculture; 2. To determine the suitable population density of sarpunti, mrigal and tilapia for culture in ponds in polyculture system; and 3. To determine the water quality parameters of the ponds under three treatments in polyculture system.

Methodology:

The ponds were rectangular in size and similar in area (about 40 m²), depth and basin-bottom soil type and contour. The experiment was conducted in a series of six earthen ponds each having an average depth of 0.90 m. The experiment was conducted in Completely Randomized Design (CRD). There were three treatments each having two replications. Seven days after liming, urea and triple super phosphate (TSP) were applied at the rate of 100 g/decimal and 200 g/decimal respectively as and regular initial doses. Fingerlings of Puntius sarana, Cirrhinus cirrhosus and Tilapia mossambica were stocked in the ponds of treatment-I at the density of 50 fish per decimal, 75 fishes per decimal in treatment-II and 150 fish per decimal in treatment-III after 7 days of fertilization. The initial average length of P. sarana, C. cirrhosus and T. mossambica were 13.29 cm, 12.80 cm and 4.55 cm respectively. The initial average weight of P. sarana, C. cirrhosus and T. mossambica were 22.70g, 23.75g and 3.84g respectively. Various water quality parameters water temperature (⁰C), transparency (cm), water depth (m) were estimated and recorded fortnightly throughout the experimental period. Water quality measurements and sample collections were made between 9.00 a.m. and 12 noons. Chemical parameters such as pH, dissolved oxygen (mg/L), free carbon dioxide (mg/L), total alkalinity (mg/L), PO₄-P (mg/L), NO₃-N (mg/L). Survival rate, growth and production of fish were estimated.

Source of Information: J. Environ. Sci. & Natural Resources, 6(2): 49-53 , 2013; ISSN 1999-7361

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The specific growth rates (SGR, % per day) of fish under treatment-I, treatment-II and treatment-III were 1.13%, 1.03% and 0.80%. The calculated net fish production of the ponds under treatment-I was 1.61 ton/ha/yr and that of the ponds under treatment-II was 1.97 ton/ha/yr and 2.5 ton/ha/yr in treatment-III.

Knowledge Management: Journal