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Length Weight Relationships and Reproductive Physiology of Endangered Kala Pabda (ompok Pabo) from the Haor Area of Mohonganj, Netrokona

Dr. Harun-Ur-Rashid
Professor
Department of Fisheries Management, BAU, Mymensingh-2202

Dr. Md. Reaz Uddin Sarker
Senior Upazila Fisheries Officer
Mohonganj, Netrokona

Abstract/ Executive Summary:

A study was conducted on the length-weight relationship, condition factor, gonado-somatic index (GSI) and gonadal histology of ‘kala Pabda’ Ompok pabo from the ‘haor’ area of Mohonganj, Netrokona. Due to scarcity of samples of this endangered species from the haor area of Mohonganj, samples for length-weight relationship, condition factor and GSI were collected from the haor area of Sylhet region. Samples for study of gonadal histology to identify annual reproductive were collected from haor area of Mohonganj. Double-log linear regression of body weight on standard length was used to estimate the parameters of length weight relationship equation (BW-qSLb). Relative condition factor was determined comparing the mean body weight with the predicted weight of fish at standard length from a generalized length-weight relationship constructed from the pooled data collected over the study period. GSI was calculated from the equation, GSI=100* (GW/BW). Different stages of testes and ovary will be studied through gonadal histology. The b value ranged from 2.474847 to 2.979953. The generalized length-weight relationships fitter to the pooled data for O. pabo was BE=0.0144621SL 2.7274 nd condition factor was 1.056319. During the study period, the highest value of GSI for male was 1.006±0.326 (May) and for female was 14.45±2.37 (May). Histological studies of ovarian and testicular development are yet to be done.

Keywords: Kala Pabda, male and female kala pabda through gonadal histology

Location: Haor area of Mohonganj, Netrokona

Start Date: 01-01-2010

End Date: 31-12-2011

Program Area: Resource Development and Management

Commodity:

Objectives:

1) To determine the linear relationship between total length and body weight of the endangered Kala Pabda fish 2) To study the reproductive physiology of male and female kala pabda through gonadal histology.

Methodology:

1) Location of work 2) Length weight relationship 3) Reproductive physiology 4) Dehydration and preservation of gonad 5) Embedding, sectioning and staining 6) Microscope observation and identification of gonadal stages

Source of Information: Bangladesh Agricultural University Research Progress, Volume-22, 2011. Proceedings of the workshop of BAU Research Progress, 02-03 April 2012.

Article Link (Online Journal):

Funding Source:

1.	Budget: 230000
2. University Grant Commission	Budget: 230000

Total Budget (Tk.) : 230000

Achievement/Findings:

During the study period, the highest value of GSI for male was 1.006±0.326 (May) and for female was 14.45±2.37 (May).

Knowledge Management: Report/Proceedings