Keywords : Euphrate river
Seasonal variations of natural feeding of Himri Barbus luteus (Heckel) and common carp Cyprinus carpio L. from Euphrates river at Al-Musayab city , Iraq
journal of kerbala university,
Volume 11, Issue 3, Pages 48-55
194 of Himri Barbus luteus and 190 common carp Cyprinus carpio L. were collected from Euphrates at Al-Musayab along the period from 2/1/2014 to 31/12/2014 using gill net and cast net. Foregut contents analysis was carriedout by using frequency of occurrence (%O) and numerical analysis (points method %P ) as well as Importance Ranking Index (%IRI) whereas( %IR I= %P x %O ) to make knowledge on the importance of fish food items.The results (according to %R) re-vealed that Himri Barbus luteus was herbivorous fish therefore the plant origin food formed %80.17 while the animal origin formed %16.62. The results showed that the aquatic plants ranked first formed %27.12 followed by detritus and algae which formed %25.90 and %20.22 respectively, then insects, diatoms and non diagnosed digestive food which formed %8.62 , %6.92 and %5.89 respectively, while common carp Cyprinus carpio L.may described as omnivorous fish because the plant origin food formed %50.09 while the animal origin formed %45.49 ,so the detritus and non diagnosed digestive food got the highest ratios of fish diet formed %29.88 and %25.08 followed by insects , aquatic plants, crustacea and algae which formed %10.87, %10.30 , % 9.24 and %7.06 respectively. As conclusion , Himri Barbus luteus may considered as herbivorous fish while Common carp Cyprinus carpio L. was omnivorous fish in this study during all year seasons.