Effects of Different Levels of Fish Oil Supplementation on Performance of Broilers

Document Type : Research Article


1 Department of Animal Science and Nutrition, Faculty of Veterinary Medicine, Chittagong Veterinary and Animal Science University, Khulshi, Chittagong, Bangladesh

2 Department of Animal Nutrition, Faculty of Animal Husbandry, Bangladesh Agricultural University, Mymensingh, Bangladesh


Six hundred day old unsexed broiler chicks were used in a 42-d trial at Chittagong Veterinary and Animal Science University Poultry Farm to compare the effects of different levels of fish oil supplementation on performance of broilers in terms of feed intake, weight gain and feed conversion and carcass characteristics. The chicks were randomly distributed following a completely randomized design in four groups having three replications per group. Each group was composed of 150 chicks and 50 birds per replicate. Four diets were formulated using locally available ingredients as diet without oil, diets containing 2.5%, 3.0% and 3.5% fish oil. Results indicated that, supplementation of diets with different levels of fish oil significantly differed (P<0.05) feed intake at 1st, 3rd, 4th and 6th weeks of age. However, there was no significant (P>0.05) effect of fish oil supplementation on feed conversion up to 5th week of age. At the end of 6th week, feed conversion of the broilers of different dietary groups differed significantly (P<0.05). Similarly, no significant differences (P>0.05) were found among all dietary treatment groups in weight gain up to 3rd week of age except at later stages. Out of eighteen parameters, shank weight, heart weight, thigh bone weight and abdominal fat weight differed (P<0.05) due to supplementation of fish oil. It can be concluded that, supplementation of fish oil at 2.5% level results in the best cumulative feed intake and feed conversion of broilers.


Aloa S.J. and Balnave D. (1984). Growth and carcass composition of broiler fed sunflower oil and olive oil. Br. Poult. Sci. 69, 844-846.
Alparasian G. and Ozdogan M. (2006). The effects of diet containing fish oil on some blood parameters and the performance values of broilers and cost efficiency. Int. J. Poult. Sci. 5, 415-419.
AOAC. (1990). Official Methods of Analysis. Vol. I. 15th Ed. Association of Official Analytical Chemists, Arlington, VA.
Baiao N.C. and Lara L.I.C. (2005). Oil and fat in broiler nutrition. Brazilian J. Poult. Sci. 7, 129-141.
Basmacioglou H., Cabuk M., Unat L.K., Ozkan K., Akkan S. and Yalcin H. (2003). Effects of dietary fish oil and flaxseed on cholesterol and fatty acid composition of egg yolk and blood parameters of laying hens. Poult. Sci. 82, 135-150.
Bezard J., Blond J.P., Bernard A. and Clouet P. (1994). The metabolism and availability of essential fatty acids in animal and human tissues.Reprod. Nutr. Dev. 34, 539-568.
Chashnidel Y., Moravej H.A., Towhidi F., Asadi M. and Zeinodini S. (2010). Influence of different levels of n-3 supplemented (fish oil) diet of performance, carcass quality and fat status in broilers. African J. Biotechnol. 9, 687-691.
Chin S.F., Storkson J.M., Albright K.J., Cook M.E and Pariza M.W. (1994). Conjugated linoleic acid is a growth factor for rats as shown by enhanced weight gain and improved feed efficiency. J. Nutr. 124, 2344-2349.
Cortinas L., Barroeta A., Villaverde C., Guardiola J.F. and Baucells M.D. (2005). Influence of the dietary polyunsaturated level on chicken meat quality: lipid oxidation. Poult. Sci. 84, 48-55.
Crespo N. and Esteve-Garcia E. (2001). Dietary fatty acid profile modifies abdominal fat deposition in broiler chickens. Poult. Sci. 80, 71-78.
Crespo N. and Esteve-Garcia E. (2002). Dietary polyunsaturated fatty acids decrease fat deposition in separable fat depots but not in the remainder carcass. Poult. Sci. 81, 1533-1542.
Du M. and Ahn D.U. (2002). Effect of Dietary conjugated linoleic acid on growth rate of live birds and on the abdominal fat content and quality of broiler meat. Poult. Sci. 81, 428-433.
Duncan D.B. (1955). Multiple range and multiple ‘F’ test. Biometrics.11, 1-42.
Halle L. (2001). Effect of dietary fish oil and linseed oil on performance, egg component and fatty acid composition of egg yolk in laying hens. Arch. Fur. Gef. 65, 13-21.
Huang Z.B., Ackman R.G.W., Ratnayake M.N. and Proudfoot F.G. (1990). Effect of dietary fish oil on n-3 fatty acid levels in chicken eggs and thigh flesh. J. Agric. Food Chem. 38, 743-747.
Jones R. (1984). A standard method for the dissection of poultry for carcass analysis. West of Scotland agricultural college, technical bulletin, Scottland.
Lopez-Ferrer S., Baucells M.D., Barroeta A.C., Galobart J. and Grashorn M.A. (2001). N-3 Enrichment of chicken meat. 2. Use of precursors of long-chain polyunsaturated fatty acids: linseed oil. Poult. Sci. 80, 753-761.
Newman R.E., Downing J.A., Bryden W.L., Fleck E., Buttemer W.A. andStorlien L.H. (1998). Dietary polyunsaturated fatty acids of the n-3 and the n-6 series reduce abdominal fat in the chicken (Gallus domesticus). Pp. 54-60 in Proc. Nutr. Soc. Australia.
Pinchasov Y. and Nir I. (1992). Effect of dietary polyunsaturated fatty acid concentration on performance, fat deposition and carcass fatty acid composition in broiler chickens.Poult. Sci. 71, 1504-1512.
Scaife J.R., Moyo J., Galbraith H., Michie W. and Campbell V. (1994). Effect of different dietary supplemental fats and oils on the tissue fatty acid composition and growth of female broilers. Br. Poult. Sci. 35, 107-118.
Singh R.A. (1980). Poultry Production. Ramanath Mazumder Street, Ballygunj, Kolkata. Kalyani Publishers, India.
SPSS. (2007). SPSS for Windows, Version 16.0. Chicago, SPSS Inc.
Stata. (2009). Stata Statistical Software. Version 11. TX: StataCorp LP., College Station, USA.
Tabeidian A., Sadeghi G.H. and Pourreza J. (2005). Effect of dietary protein levels and soybean oil supplementation on broiler performance.Int. J. Poult. Sci. 4, 799-803.
Zerehdaran S., Vereijken A.L.J., Arendonk A.M. and Waiij E.H. (2004). Estimation of genetic parameter for fat deposition and carcass traits in broilers. J. Poult. Sci. 83, 521-525.
Zollitsch W., Knaus W., Aichinger F. and Lettner F. (1997). Effects of different dietary fat sources on performance and carcass characteristics of broiler.Anim. Feed Sci. Technol. 66, 63-73.