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Food and Feeding Habit of Bele Glossogobius Giuris (hamilton and Buchannan, 1822) Collected from Mithamain Haor of Kishoreganj Districts, Northeastern Bangladesh

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

Animesh Roy
Department of Fisheries Biology and Aquatic Environment, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh

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

Abstract/ Executive Summary:

In the present study, an attempt has been made to investigate the food and feeding habits of the Bele Glossogobius giuris from Mithamoin Hair, Kishorgonj, Bangladesh. Fish specimens were collected monthly from March 2014 to February 2015. During this study 252 specimens were collected. On the basis of qualitative and quantitative analysis of gut contents, G. giuris has been categorized as carnivorous. Food items mainly consist of fish, crustaceans, insects, zooplankton and algae. The main food items in guts were recorded as; fishes (46.7, 53.181%), Insects (3.6, 2.050%), Crustacean (16.2, 14.535%), zooplankton (3, 1.216%), algae (0.5, 0.162 %) by volume and occurrence. The mean value of Gastrosomatic index (GaSI) and active feeding were found to be maximum 3.08 and 0.56 in February 2015 and minimum 1.50 and 0.32 in October 2014 respectively. Highest Gastrosomatic Index and Active feeding occurred during winter (February) prior to breeding season started and lowest Gastrosomatic Index value, as well as poorer active feeding, occurred during the breeding season.

Keywords: Food and feeding habit, Gut contents, Carnivores, Gastrosomatic index, Active feeding, Breeding season

Location: Mithamain Haor of Kishoreganj districts, northeastern Bangladesh

Start Date: 00-03-2014

End Date: 00-02-2015

Program Area: Animal Health and Management

Commodity: Quality, Feed

Objectives:

These fluctuations could be known by qualitative and quantitative analysis of gut contents of a fish and/or by the estimation of Gastrosomatic Index. Food and feeding habits of fishes have a great importance in aquaculture practice. It helps to choose such species of fishes for aquaculture which will utilize all the available potential food of the water bodies without any competition with one another but will live in association with other fishes. Nevertheless, for developing culture technologies, biological studies of this species are indispensable. Therefore, the purpose of this investigation was to identify the food and feeding habits of G. giuris to generate the base line information for facilitating the sustainable aquaculture of it in the whole country.

Methodology:

Adult fish of G. giuris were collected monthly from Chamra Ghatbazer, Mithamain, Kishoreganj haor region of Bangladesh from March 2014 to February 2015. After collection, samples were preserved in 10% formalin to stop digestion of food items. Individual fish weight was taken before the observation of gut content. The individual fish was cut open and gut was removed on to petridish with the help of very fine forceps for gut analysis. The collected guts were weight for calculating the Gastro somatic index (GaSI). Gut content was analyzed qualitatively as well as quantitatively by eye estimation volumetrically [6] and occurrence method under binocular microscope. For evaluating the relative importance & grading of all food items, index of preponderance was obtained using formula:

I= ViOi / ∑ViOiX 100

Where, I= Index of preponderance Vi= volume percentage Oi= Occurrence percentage ∑= Summation Gastro somatic index (GaSi) was calculated using the formula given by: GaSI (%) = Weight of gut (g) / Weight of fish (g) X 100 Relative lengths of gut (RLG) of fish were also measured to determine the food habit of fish. RLG = Length of gut / total length of fish.

The average feeding intensity was evaluated by points method and depending on the fullness of stomachs points were assigned as 1.25, 1.0, 0.75, 0.5, 0.25, 0.10 and 0 for gorged, full, 3/4 full, ½ full, 1/4 full, trace and empty stomachs respectively. The fish was considered as an active feeder when stomach was gorged, full and 3/4 full, moderate when 1/2 full and poor when 1/4 full or with traces.

Source of Information: International Journal of Fisheries and Aquatic Studies 2016; 4(5): 84-88

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the study of the gut contents of G. giuris based on numerical study it was found that this species feeds on animal as well as plant materials which composed of fish, insects, crustaceans, algae and zooplankton. From the volume and percentage of biomass ingested, it can be said that animal proportion is high than the other materials. On the other hand considerable time of the year a recognizable proportion of the biomass composed of juvenile of G. giuris. Therefore, it can be concluded that the species is carnivore and cannibalistic in nature. The feeding intensity of the fish was varied in different seasons as the gastro somatic index of fish was observed to be maximum during winter season (January and February) while minimum during two spawning period (March and October). This may be concluded that feeding intensity is maximum during winters as well as off breeding season while minimum in spawning period.

Knowledge Management: Journal