The Israeli Journal of Aquaculture - Bamidgeh 55(2), 2003, 139-143

Short Communication:
THE GUT CONTENTS OF GRASS CARP,
CTENOPHARYNGODON IDELLA, DURING NURSING IN AN EARTHEN POND


Mine Uzbilek Kirkagaç

Department of Fisheries and Aquaculture, Faculty of Agriculture, University of Ankara, 06110 Dýskapý, Ankara, Turkey

(Received 10.9.02, Accepted 9.10.02)

Key words: animal feed, fry, gut contents, grass carp, plant feed

Abstract

Grass carp fry (0.040.01 g avg wt; 1.480.03 cm total length) were stocked into an earthen pond in June. Every week for twelve weeks, fifteen fish were sacrificed and the content of their guts was examined. At the first week, animal material represented 74% of the gut contents. From the second week onwards, plant material was higher (mean value 79%). In the seventh week, when grass carp reached 4.830.09 cm, filamentous algae were replaced by macrophyte fragments. Besides the macrophytes, animal material such as the rotifers Monostyla and Lecane and the cladoceran Bosmina were found and the proportion of animal material in the gut varied 11-26%.


*Corresponding author: kirkagac@agri.ankara.edu.tr

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