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Fecundity and Gonadosomatic Index of Labeo Calbasu (hamilton) from a Stocking Pond of a Hatchery at Faridpur, Bangladesh

M. A. Kabir
Department of Zoology, University of Dhaka, Dhaka-1000, Bangladesh

M.M.A. Quddus
Department of Zoology, University of Dhaka, Dhaka-1000, Bangladesh

Abstract/ Executive Summary:

Fecundity, gonadosomatic index (GSI) and ova diameter of the cyprinid fish Kalibaush (Labeo calbasu,Ham.) were studied from a closed water hatchery pond, Faridpur district during April 2007 to March 2008. Fecundity of the fish ranged from 37454 to 427030 with an average 230242. The maximum fecundity was from a fish with total length of 51.3 cm and 1785 g in weight and minimum from a fish with a total length of 32.5 cm and 720 g in weight. The number of ova present per gram of body weight was 213.13 and the number of ova present per gram of ovary weight was 1359.17. It was observed that the fish spawned once in a year with one spawning peak in the month of July as indicated by the values of both ova diameter (1.3± 0.04) and gonadosomatic index (1.68± 0.11 and 18.58 ± 0.06) respectively. The relationship between fecundity and other variables (Total length, body weight and gonad weight) was linear and significant (P<0.01).

Keywords: Fecundity, GSI, ova diameter, Labeo calbasu, hatchery stocking pond

Location: Closed water hatchery pond, Faridpur district

Start Date: 00-04-2007

End Date: 00-03-2008

Program Area: Animal Health and Management

Commodity: Carp fish

Objectives:

1. The present research work was undertaken to estimate the fecundity, gondosomatic index and ova diameter and to find out its relationship with total length, body weight and gonad weight of this carp fish.

Methodology:

The present research work was undertaken to estimate the fecundity, gondosomatic index and ova diameter and to find out its relationship with total length, body weight and gonad weight of this carp fish. taken out very carefully and preserved in a well labeled vial containing 5% formalin for subsequent study. The fecundity of various sizes of kalibaush was estimated by gravimetric method. The fecundity of 16 specimens were computed by counting of ova in all samples of 1.0 g from each ovary. Gonadosomatic index (GSI) of the male (72) and female (69) fishes were determined separately by using the following formula: GSI = Gonad weight/Body weight × 100. In this study at least 200 ova were taken randomly from the mixed sample of eggs from experimental 'fishes ovary' in different months. The diameter (mm) of the eggs at different stages of maturity was measured with the help of a dissecting microscope by using occulometer.

Source of Information: Bangladesh J. Zool. 41(1): 43-48, 2013

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The present investigation indicates that the relationship between fecundity and other variables were linear and positively significant. From the above results it can be concluded that fecundity increases with the increases in gonad weight of the fish.

Knowledge Management: Journal