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Food and Feeding Habit of Cyprinus Carpio Var. Specularis

M R Manon
Lecturer (Zoology), Niamotpur Degree College, Naogaon

M D Hossain
Associate Professor, Department of Fisheries, University of Rajshahi.

Abstract/ Executive Summary:

The study was carried out from November 2010 to August 2011. A total of 137 specimens of Cyprinus carpio var. specularis were collected from Naogaon municipal fish market, Shabi hat fish market, Niamatpur fish market and directly from the culture pond of Naogaon district The month-wise collection and experiments were made to show the seasonal variation in food choice, and feeding habit of the fish. The highest percentage of empty stomach was in the month of April 2011 (56.67%) and the lowest percentage of empty stomach was in the month of August 2011 (26.32%). The highest percentage of full stomachs was found in the month of August 2011 (73.68%) and the lowest percentage of full stomachs was found in April 2011 (43.33%). The analysis of stomach contents of C. carpio var. specularis revealed that the food of the fish consists of aquatic plant parts (20.12%), phytoplankton (16.46%), zooplankton (19.69%), debris and detritus (22.00%), insects (6.78%) and semi-digested materials (14.83%). The highest percentage (33.26%) of aquatic plant parts were observed in June 2011 and the lowest percentage (8.80%) in December 2010. The average total length was 37.83±6.96 cm and the average alimentary canal length was 100.63±7.89 cm.

Keywords: Food and feeding habit, Cyprinus carpio var. specularis, Alimentary canal

Location: Laboratory of the Dept. of Fisheries, University of Rajshahi,

Start Date: 00-11-2010

End Date: 00-08-2011

Program Area: Animal Health and Management

Commodity: Fish

Objectives:

The present study deals with the food mid feeding habit of C. carpio var. specularis, observe the stomach contents and the relationship between total length and alimentary canal length.

Methodology:

A total of 137 specimens of C. carpio var. specularis were collected from November 2010 to August 2011. The month-wise collection and experiments were made to show the seasonal variation in food choice, and feeding habit of the fish. Just after collection 10% formalin solution was injected into the gut of all the fishes in order to stop digestion of food items. All the experiments were carried out in the laboratory of the Dept. of Fisheries, University of Rajshahi, Some fresh and live specimens were also examined. The stomach of the fishes were dissected with the help of a simple scissors and the stomach contents were taken into a petridish and the food items were identified by (Magnification 5X, 10X) and weighted in an electronic balance. Gravimetric method (Hynes, 1950; Pillay, 1954) was followed for estimation of the percentage composition of food items. The relationship between total length and the alimentary canal length and total length and stomach length the well known statistical formula wasY = a + bX Where, Y = alimentary canal length (ACL), X = Total length (TL), ‘a’ is the interception on the ordinate and ‘b’ is the regression co-efficient.

Source of Information: J. Sci. Foundation, 9(1&2): 163-181, June-December 2011 ISSN 1728-7855

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It was observed that the feeding intensity of C. carpio var. specularis in matured fish was poor and the feeding intensity was very poor in spawning period. The feeding intensity of immature fishes was found to feed actively. The food and feeding habits of fishes vary from month to month. This variation is due to the changes in the composition of food organisms occurring at different seasons of the year (Bhuiyan et al., 1997, 1998, 1999).

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