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A Histological Study of the Spermatogenesis in Ompok Pabda (hamilton-buchanan 1822)

K.A. Siddiqua
Department of Zoology, University of Dhaka, Dhaka 1000) Bangladesh

A.T.A. Ahmed
Department of Zoology, University of Dhaka, Dhaka 1 000) Bangladesh

M.G. Hussain
Freshwater Station, BFRI, Mymensingh 2201

M.S. Islam
Freshwater Station, BFRI, Mymensingh 2201

Abstract/ Executive Summary:

The present study deals with the histological analysis of testicular development in Ompok pabda. For the study, male gonads were collected monthwise from January to September at Freshwater Station, BFRI, Mymensingh. From the analysis, 4 stages of sperm formation, namely, spermatogonia, spermatocytes, spermatids and spermatozoa, were distinguished. The percent distribution of spermatozoa was highest in July ( about 92%). Maximum GSI value was 1.129 ± 0.271 found in July. By analysing the histology of spermatogenesis it was established that this species breeds once in a year.

Keywords: Histology, Spermatogenesis, Ompok pabda

Location: Freshwater Station, Bangladesh Fisheries Research Institute

Start Date: 00-01-1996

End Date: 00-09-1996

Program Area: Animal Health and Management

Commodity: Cat fish

Objectives:

To define the successive maturational stages of male gonads histologically for detecting the spawning season,
To classify the gonads by measuring the percent distribution of different developmental stages of spermatogenesis at successive months.

Methodology:

To complete the experiment, studies were conducted from January to September, 1996, at the Freshwater Station, Bangladesh Fisheries Research Institute (BFRI), Mymensingh. To study the testicular development histologically, the experimental fish (0. pabda) which were more or less of same year-class were collected from the same rearing pond. Before dissecting the fish sample in every month, total body length and body weight were measured. After dissection, the gonads were carefully removed and were cleaned of all surrounding tissues. Before fixing the gonads in Bouin's fluid the gonad weight and the physical features of testes were also observed and noted. GSI (Ganado Somatic Index) was determined by using formula. For the histological investigation, permanent microscopic slides of the successively collected gonads were prepared in the laboratory by microtechnique method. The prepared slides were examined and studied by a compound microscope in laboratory and all the successive stages of spermatogenesis were observed. The percentage of different stages of sperm formation was determined and photomicrography was done.

Source of Information: Bangladesh J. Fish. Res., 4(2): 185-189, 2000

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

4 stages of sperm formation, namely, spermatogonia, spermatocytes, spermatids and spermatozoa, were distinguished. The percent distribution of spermatozoa was highest in July ( about 92%). Maximum GSI value was 1.129 ± 0.271 found in July. By analysing the histology of spermatogenesis it was established that this species breeds once in a year.

Knowledge Management: Journal