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Fecundity and Gonadosomatic Index of Glossogobius Giuris (hamilton, 1822) from the Payra River, Patuakhali, Bangladesh

Animesh Roy
Department of Fish Biology and Biotechnology, Chittagong Veterinary and Animal Science University, Bangladesh

Mir Mohammad Ali
Department of Aquaculture, Patuakhali Science and Technology University, Bangladesh

Mohammad Abdus Salam
Department of Genetics and Fish Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh

Mohammad Lutfar Rahman
Department of Genetics and Fish Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh

Md. Shakhawate Hossain
Department of Fisheries Biology and Aquatic Environment, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh

Abstract/ Executive Summary:

Glossogobius giuris were collected during March to September 2013 from the Payra river to estimate the length-weight relationship with relative condition factor (Kn), fecundity, gonadosomatic index (GSI) and relation between fecundity and other parameters. The length-weight relationship was found to be Log W= 2.667 Log TL – 1.805 in male and Log W = 2.931 Log TL – 2.040 in female. The mean K_n were found to be 1.02±0.155 for male and 0.97±0.276 for female which indicates satisfactory condition of the fish population. The mean relative fecundity was ranged from 88495 to 264104 with a mean value of 171581±17855, having a average total length of 21.21±0.44 cm, body weight 70.22±4.62 g and gonad weight 2.74±0.31 g. The relationships among the fecundity, the total length, body weight, gonad weight were found to be linear and positively correlated. The mean GSI value was 3.42±0.33 and the highest GSI value was recorded 9.34±0.71 in the month of September. This study will help to introduce this species in sustainable aquaculture through proper management and for the development of induced breeding technique.

Keywords: Length-weight relationship, Condition factor, Gonadosomatic index, Fecundity, Glossogobius giuris

Location: Payra River, Patuakhali, Bangladesh.

Start Date: 00-03-2013

End Date: 00-09-2013

Program Area: Animal Health and Management

Commodity: Aquatic animal

Objectives:

1. To study the length-weight relationship, fecundity and gonadosomatic index of G. giuris.

Methodology:

Sample collection: For this research work 115 specimens of G. giuris were collected from the Payra River. Fish samples were collected from March to September 2013 from different fishermen. After collection fishes were kept in ice and carried immediately to the laboratory. Length-weight relationship: Fishes were classified according to sex and total length of each fish was measured in centimeter with maximum accuracy and the body weight in gram was determined using a digital balance (model PA 214). Length-weight relationship was determined by fitting the data to a potential relationship based on the exponential equation in the form of TW = aTL^b where, TW is the total weight (expressed in g), TL is the total length (expressed in cm), a is a coefficient related to body form and b is an exponent indicating isometric growth when equal to 3. This relationship was transformed into a linear form by the equation. Condition factor: The relative condition factor ‘Kn’ refers to the relative robustness, or the total well being of the fish. Relative condition factor of the present study was determined. Gonadosomatic index and fecundity: To determine the gonadosomatic index each fish was sacrificed to collect the ovaries and the ovaries were dried with the help of blotting paper and weighed individually by an electric balance and kept in 5% formalin for the preservation of the ovaries as well as to make it much easier to separate the eggs. Fecundity was determined by gravimetric method. Three sub samples were taken from the anterior, middle and posterior portion of the ovary. The numbers of eggs were counted for each sample and fecundity was determined. Data analysis: Microsoft Excel and SPSS were used to determine linear relationship and correlation coefficient (r) between total length and fecundity, body weight and fecundity, gonad weight and fecundity.

Source of Information: Journal of Fisheries 2(2); 141-147, August 2014

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The result of length weight relation and condition factor of the Glossogobius giuris population from the Payra River is satisfactory. Peak breeding season of this species is August and September. The fecundity of this species is very high. This work would also contribute to the existing knowledge by acting as a baseline data for carrying out future researchespecially on taxonomy, racial study, morphology, genetic diversity and breeding parameter of other fish species in Bangladesh.

Knowledge Management: Journal