Evaluation of toasted sunflower (Helianthus annus) seed meal in the diets of African catfish (Clarias gariepinus) fingerlings

摘要

Afeedingtrialwasdesignedandcarriedouttoassessthegrowth,nutrientutilizationheamatologicalprofileandyieldofAfricancatfish,Clariasgariepinusfedgradedlevelsoftoastedsunflowerseedmealbaseddiets.Onehundredandfifty(150)fingerlingsofClariasgariepinus(13.08±0.1g)werefedwithfiveiso-nitrogenousdietscontaining40%crudeprotein.Thetoastedsunflowerseedmeal(TSFSM)proteinreplacedfishmealmealinthedietsinthefollowingproportions:DietTSFI(0%TSFSM),DietTSF2(25%TSFSM),DietTSF3(50%TSFSM),DietTSF4(75%TSFSM),andDietTSF5(100%TSFSM).Attheendofthetrial,themeanweightgainoffishwashighestindietTSF1(103.47g),andlowestindietTSF5(24.54g),withasignificantdifference(p0.05).Therewasnosignificantdifference(P0.05)inmeanweightgain(MWG)offishfeddietTSF1(andfishfeddietTSF2.Feedconversionratio(FCR)wasbestinfishfeddietTSF1(1.18)butnotsignificantlydifferent(P0.05)fromfishfeddietTSF2(1.28).Thehighestapparentnetproteinutilization(APP-NPU)of25.00%wasrecordedinfishfeddietTSF1.Itwassignificantlyhigher(P0.05)thanothers,whilethelowestvalueof15.00%wasrecordedinfishfeddietTSF5.Heamatologicalparameterssuchaspackcellvolume(PCV),heamoglobin(Hb)andmeancorpuscularvolume(MCV)decreasedastoastedsunflowerseedmealincreasedindiet.PCVwashigher(35.00mg/dl)significantlyinfishfedTSF1thanthevalueof(31.00mg/dl)infishfeddietTSF4.Itwasthereforeobservedthattoastedsunflowerseedmealproteincanfavourablyreplace25%offishmealproteininthedietsofClariasgariepinusfingerlings.