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Seasonal Occurence of Food and Feeding Habit of Labeo Bata(hamilton) (cypriniformes : Cyprinidae)

Md. Abdur Razzaq Joadder
Fisheries Research Laboratory, Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Rajshahi

Abstract/ Executive Summary:

Food and feeding habits of fishes have a great significance in aquaculture practices. It helps to select such species of fishes for culture which will utilize all the available potential food of the water bodies without much competition with one another but will live in association with other fishes. This paper deals with the feeding intensity and food habits of L. bata . Food and feeding habit of freshwater minor carp Labeo bata (120 to 250 mm total length) were studied. The fish is a herbivore, feeding mainly on algae (22.32 %), higher plant parts (31.26 %), protozoans (7.42 %), crustaceans (15.33 %), insects (3.56 %), muds, sand, debris and detritus (16.32 %) and unidentified food materials (3.99%). [Journal of Science Foundation, 2014;12(1):7-15]

Keywords: Labeo bata, food, feeding habit , feeding season, length

Location: Rajshahi

Start Date: 01-02-2007

End Date: 31-01-2009

Program Area: Resource Development and Management

Commodity: Carp fish

Objectives:

The present study is aimed to obtain some knowledge about the food and feeding habits of L. bata with a view to select such species for poly culture to obtain an optimum yield by utilizing all the potential food of the water bodies without much competition. This fish is a good source of protein, calcium, essential amino acids, phosphate, magnasium, iodine, iron ,vitamin B complex, E and A.

Methodology:

A total number of 428 specimens of L. bata was collected from local (river, beel and pond) areas in Rajshahi during the period from February 2007 to January 2009. The samples were collected once in every month. Just after collection, 10% buffered formalin solution was injected into the guts of all the fishes in order to stop digestion of food items. The stomach fullness of all the specimens were noted and the stomachs were classified into full, 3/4 full, 1/2 full, 1/4 full, 1/8 full and empty. The stomach of each specimen was dissected gut with a fine scissors and stomach contents were taken. Total alimentary canal length (ACL) was measured and total weight of food items of each fish was weighted by an electronic balance (Model-400EX, MFD by A and D Co. Ltd., Korea) and from the observed results the percentages of different food items were calculated month-wise throughout the study period by using the gravimetric method (Hynes, 1950). Afterwards the undigested gut contents were separated and estimated under a simple and binocular microscope (Magnification 10x) and categorized them under different taxonomic hierarchy by following Ward and Whipple (1959), Mellanby (1963), Needham and Needham (1972).

Source of Information: Journal of Science Foundation, January 2014, Vol. 12, No.1 ISSN 1728-7855

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The present study showed different body lengths are depended upon total length. The total weight also depends upon the total length. The food and feeding habit of fishes vary from different fish consume different types of food. So the study of food and feeding habit has immense ecological values to select the culturable species and to avoid inter specific competition. The present investigation reveals that the most important food items of L. bata is algae, aquatic plants, protozoans and crustaceans. The fish is herbivorous in feeding habit. This research work provides an important baseline study on food and feeding habit of this minor carp (L. bata) from Bangladesh. The results of the study would be an effective tool for fishery biologists, managers and conservationists to initiate early management strategies and regulations for the sustainable conservation of the remaining stocks of this species in the aquaculture ecosystem.

Knowledge Management: Journal