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Estimation of the Fecundity of Jat Puti, Puntius Sophore (hamilton)

K. Bithy
Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh-2202

M. F. Islam
Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh-2202

K. R. Hasan
Ph.D. Fellow, Dept. of Fisheries Management, Bangladesh Agricultural University, Mymensingh-2202

M. I. Miah
Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh-2202

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

Abstract/ Executive Summary:

The fecundity of 100 gravid female fishes of Jat puti, Puntius sophore, was collected from the experimental ponds of the Field Laboratory Complex, Faculty of Fisheries, Bangladesh Agricultural University (BAU), Mymensingh was estimated during the period from June to August 2011. Collected samples were clustered month-wise: group A (collected in June), group B (collected in July) and group C (collected in August). The estimated fecundity ranged of 7951 to 17670; 8135 to 23053 and 12461 to 15105 eggs and the mean gonadosomatic index (GSI) of 23.44 ± 2.50; 30.47 ± 4.52 and 28.43 ± 2.99 was estimated for the fish group of A, B, and C, respectively. The relationship between fecundity and total length was linear and it was expressed as: Ln F= 1634 ln TL-1972; Ln F= 119405 ln TL-273.53 and Ln F= 1831.6 ln TL+ 825.31 in group A, B, and C, respectively. The regression equation between body weight and total length was linear and it was expressed as: Ln W= 2.2128 ln TL- 0.7048; Ln W= 2.0207 ln TL+ 0.3493 and Ln W= 1.4438 ln TL+ 5.5694, in group A, B, and C, respectively. The regression equation between body weight and fecundity was linear and it was expressed as: F= 656.84 W+199.96, F= 438.16 W+2470, F= 1116.1 W-3433.5, in group A, B, and C, respectively. The fecundity was highly correlated with the total length, and body weight and P. sophore may be a medium fecund fish.

Keywords: Fecundity, Jat puti, Puntius sophore

Location: Field Laboratory Complex, Faculty of Fisheries, Bangladesh Agricultural University (BAU), Mymensingh

Start Date: 00-06-2011

End Date: 00-08-2011

Program Area: Animal Health and Management

Commodity: Fish

Objectives:

1. To evaluate the commercial potentialities of the fish stock, information on the fecundity of the fish composing the stock is essential. Knowledge of a reproductive biology of fish is essential for evaluating the life history culture practices and the management of the fishery

Methodology:

Collection of brood fish - A total of 100 gravid females of P. sophore were collected from the ponds of the Fisheries Field Laboratory Complex, Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh, during the months of June, July, and August, 2011. At least 31 fishes were collected in each month. The breeder’s body structure was easily identified on the basis of external feature of their abdomen, vent and pectoral fins. After selection of the fishes, the specimens were preserved in 10% buffered formalin. The fishes were kept into three labeled vials according to the month. Measure of length and weight - The standard length and total length were recorded separately to the nearest centimeter scale respectively. A steel scale was used to measure the length of the body. The weight of the specimens was taken by an electric balance and the weights were recorded to the nearest gram. The ovary of the individual fish was taken out carefully and preserved in 10% buffered formalin. Calculation of gonadosomatic index (GSI) - The GSI is the percentage of gonad weight to the total weight of the fish. The GSI of the collected fish was calculated for each of the female separately. Fecundity estimation - Fecundity has been considered as the number of ripening eggs in the female prior to spawning. Gravimetric method or weight method was used for estimation of the fecundity of P. Sophore. Gravimetric method seemed to offer the best possibility of minimizing error due to its simple and easy sampling techniques. The Gravimetric method has used for its greater efficacy over the other methods. The Gravimetric or weight method has been successfully used.The gravimetric method was done by the following way, before estimation of the fecundity of the fish species under study, ovaries were cut into some sections or pieces from where pieces removed from the front, mid and rear-section of each ovary and weighed (0.22 gm). This value was proportional to the total ovary weight; the number of eggs (F1) for the sub-sample was estimated. Data analysis - From the above data, the relationship of different parameters such as total length and body weight, total length and fecundity, body weight and fecundity were determined as simple linear relationship with the help of MS Excel Programme. Coefficient of correlation (r), regression equation, standard deviation, was also determined.

Source of Information: J. Environ. Sci. & Natural Resources, 5(2): 295 - 300, 2012; ISSN 1999-7361

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The present observations on fecundity reveal that P. sophore (7951 to 23053 eggs) is a fecund fish compared to other fishes like, Esomus danrica (392 to 2412 eggs), Amblypharyngodon mola (1021 to 13815 eggs), Ambassis nama (110 to 2448 eggs), Glossogobius giuris (376 to24668 eggs) and Colisa lalius (127 to 2309 eggs). Lower number of eggs might also be correlated with shorter development time rate of fingerling, which means higher survival rate. The higher number of eggs does not prove to be a disadvantage in reproductive potential. It is an indicator of population behavior and fecundity.

Knowledge Management: Journal