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Length-weight Relationship, Condition Factor and Relative Condition Factor of Macrobrachium Rosenbergii in Rice Fields

M. KUNDA*
Department of Fisheries Management, Faculty of Fisheries Bangladesh Agricultural University Mymensingh-2202 Bangladesh

S. DEWAN
Department of Fisheries Management, Faculty of Fisheries Bangladesh Agricultural University Mymensingh-2202 Bangladesh

M.J. UDDIN
Department of Fisheries Management, Faculty of Fisheries Bangladesh Agricultural University Mymensingh-2202 Bangladesh

M. KARIM
Department of Fisheries Management, Faculty of Fisheries Bangladesh Agricultural University Mymensingh-2202 Bangladesh

S. KABIR
Department of Fisheries Management, Faculty of Fisheries Bangladesh Agricultural University Mymensingh-2202 Bangladesh

M.S. UDDIN
Department of Fisheries Management, Faculty of Fisheries Bangladesh Agricultural University Mymensingh-2202 Bangladesh

Abstract/ Executive Summary:

To determine the length-weight relationship of Macrobrachium rosenbergii a total of 100 shrimps were collected from the experimental plots of integrated rice fish/shrimp culture which was carried out at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, Bangladesh from 2nd August to 30th November, 2003. Standard length-weight relationship of Macrobrachium rosenbergii was obtained: Log W= -2.0518341 + 3.07513132 Log L. The co-efficient of correlation (r) was 0.99 which showed strong and highly significant relationships between length and weight. The mean values of condition factor (K) and relative condition factor (Kn) were 1.0893674 and 1.0012671, respectively, which suggest good condition of the prawn in rice fields.

Keywords: Length-Weight Relationship, Condition Factor, Macrobrachium rosenbergii, Rice Fields

Location:

Start Date:

End Date:

Program Area: Farming System

Commodity: Cropping System, Shrimp

Objectives:

The authors undertook the present work on this species as part of an integrated rice fish/prawn culture program.

Methodology:

To determine the length-weight relationship, a total of 100 Macrobrachium rosenbergii were taken from the rice field during harvesting. Then total length (cm) and weight (g) of individuals were measured. Among the recorded data, the lowest and highest total length were determined and the range was divided into nine class intervals for M. rosenbergii. Then the frequencies were determined for various class intervals. The regression line of length-weight relationship was drawn by plotting body weight data against total length data. Again, all the mid values (cm) of the class intervals and the corresponding average weight (g) were converted to base log10 to obtain straight line relationship between length and weight. The length-weight relationship was fitted using the formulae established by Le Cren (1951).

Source of Information: Asian Fisheries Science 21(2008):451-456

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Based on the present results, it can be noted that M. rosenbergii is compatible for rice fish/prawn integrated culture system

Knowledge Management: Journal