Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Food Habits of Oxygaster Bacaila (ham.) from Kaptai Lake, Bangladesh

A. Mamun
Department of Zoology, University of Chittagong, Chittagong 4331, Bangladesh

M. A. Azadi
Department of Zoology, University of Chittagong, Chittagong 4331, Bangladesh

Abstract/ Executive Summary:

Gut contents of 120 Oxygaster bacaila from Kaptai Lake were studied. Index of preponderance (IP) indicated that 0. bacaila consumed highest amount of Insects (35.89%) and thus occupied the first position among the food items. Zooplankton (Rotifera and crustacea 31.79%) and the other food items found in the guts were algae (Chlorophyceae, Bacillariophyceae, Euglenophyceae and Cyanophyceae 24.51%). From the analysis of gut contents, this fish might be considered as omnivore as it consumed both animal and plant foods with higher preference for animal food. The feeding intensity of this fish is fairly high. Total length (TL) versus gut length (GL) relationship and their ratio were found to be GL = 0.57663 TL^1.04801 (r = 0.9963) and TL: GL = l: 0.7086 respectively.

Keywords: Food habit, Oxygaster bacaila, Kaptai Lake

Location: Rangamati, Chittagong Hill Tracts.

Start Date: 00-07-1999

End Date: 00-06-2000

Program Area: Conservation and Biodiversity

Commodity: Aquatic animal

Objectives:

To determine the food and feeding habits of 0. bacaila from Kaptai Lake

Methodology:

One hundred twenty specimens of 0. bacaila were collected for examination from Bangladesh Fisheries Development Corporation (BFDC) fish landing center at Rangamati, Chittagong Hill Tracts from July'99 to June'00. The fish samples were preserved in 5% buffered formalin immediately after collection and carried to the laboratory. Upon collection the length and weight of the fishes were recorded to nearest millimeter and 0.01g respectively. The fishes were dissected by a sharp scissors, then the entire alimentary canal of the fishes were taken out immediately. After dissection of fish total gut length were recorded to nearest millimeter. The food items were identified up to generic level. For the analysis of gut contents two methods namely occurrence and points methods were used. Occurrence method : The number of stomach containing one or more food items was recorded. The number was then expressed as a percentage of all stomach. Points method : In this method, each of the food item was allotted of points on the basis of quantity and aU the points gained by different food items were summed up and scaled down to percentage to express them in percentage composition of the gut contents of all the fish examined. The relative importance of various food items was calculated. Relationship between total length and gut length of the fish was calculated by least square method.

Source of Information: Bangladesh J. Fsh. Res.,8(l), 2004: 27-34

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

0. bacaila mainly depend on insects (Red and black ant and small water bugs), Zooplankton (Rotifers and Crustaceans) and ?Phytoplankton (Chlorophyceae, Bacillariophyceae, Euglenophyceae and Cyanophyceae) which rightly indicated that the fish is a planktivore omnivorous with preference for animal nature plankton like insects and Zooplankton.

Knowledge Management: Journal