Food and Feeding Habits of Common Carp (Cyprinus carpio) Larvae and Juveniles in Earthen Ponds

Food and feeding habits of common carp (Cyprinus carpio) larvae and juveniles werestudied in earthen ponds of Marine Science Centre Fish Farm. Total length and mouth width of fish weremeasured aid of dissecting microscope, while digestive canal contents and fullness degree were inspectedaid of compound microscope. Water temperature was between 22-24 °C, whereas salinity was 4 PSU.Results are showed high correlation (0.98) between fish length and mouth width, where mouth width wasincreased with increasing of fish length. Feeding intensity and activity were 13.98 and 88% respectively,whereas important relative indexes were 3731, 2559, 2263 and 1 for artificial feed, algae, diatoms andcopepods respectively. Results appeared that digestive canal of fish less than 25 ml length wasundifferentiated straight pipe while in fish more than 25 mm length was curved pipe. Five genere of algae(Chlorella, Oscillatoria Rhizosolina, Spirogyra and Ulothrix ) were detected in the alimentary canal offish.