Effect of the different oil on growth performance and body composition of rainbow trout (Oncorhynchus mykiss W., 1792) juveniles

Fish oil is the main lipid for energy and essential fatty acid source in commercial fish feeds. The steady production and rising price of fish oil encourage the inclusion of vegetable oils in fish feeds. In order to evaluate the effect of the vegetable oil on growth performance and whole body composition of rainbow trout was researched in this study. Weight gain, feed conversion ratio, specific growth rate, whole body composition and amount of fatty acids of rainbow trout fed the feeds included fish oil; soybean oil and sunflower oil were studied. Rainbow trout juveniles having approximate initial weight of 5.78±0.09 g were fed by experimental feeds included different kinds of oil during 60 days. As a result of the experiment, weight gain of the fish were found 29.3±0.4 g in the fish oil group, 28.1±0.4 g in the sunflower oil group and 28.8±0.6 g in the soybean oil group. Feed conversion ratios were found 1.05, 1.12 and 1.08 respectively. The fish was fed by a commercial trout feed added different kind of oils with a ratio of 10% and containing approximately 43.5% crude protein, 14.0% crude lipid. At the end of the feeding trials, whole body fat contents were found 6.1% in the fish oil group, 5.3% in the sunflower group and 5.9% in the soybean oil group. There is no big difference among the groups regarding to lipid accumulation in the liver. Naturally in the groups fed the feeds included vegetable oil, the ratio of n-6 fatty acids were higher than the control group and in the group fed fish oil (control group), n-3 fatty acids ratio were higher than the others. As a result, it is possible to use certain amount of soybean oil and sunflower oil as substitute fish oil in the rainbow trout diets.

Anahtar Kelimeler:

balık beslenmesi, beslenme, lipit, vücut komposizyonu, yağ asitleri, büyüme performansı, gökkuşağı alabalığı

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AOAC. 1998. Official Methods of Analysis (16th. Edition) Association of Official Analytical Chemists. Gaithersburg, Maryland, 20877-2417 USA. Vols. I and II, 4th Revision.

Akyıldız, A.R. 1968. Yemler Bilgisi. Laboratuar Kılavuzu. Ankara Üniversitesi Ziraat Fakültesi Yayınları: 358, Ankara Üniversitesi Basımevi. Ankara: VII+ 207pp

Anon. 2000. DIE 1999 yılı istatistikleri. T.C Devlet İstatistik Enstitüsü, DIE Matbaası, Ankara: IX+45pp

Austreng, E. 1979. Fat levels and fat sources in dry diets for salmonid fish. From Proc. World Symp. on Finfish Nutrition and Fish feed Technology, Hamburg 20-23 June, 1978, Berlin,: II: 313-326.

Barnabe, G. 1990. Culture of salmonids in freshwater. Aquaculture. R. Bilard (Ed.), Ellis Harward Limitted, England. 2: 549-592.

Christie, W.W. 1992. Lipid analysis. Pergamon, Oxford, England, 52-56 pp.

Emidio, F., Gomes, G.C. and Kaushik, S. 1993. Effects of dietary incorporation of a co-extruded plant protein (rapeseed and peas) on growth, nutrient utilization and muscle fatty acid composition of rainbow trout (Oncorhynchus mykiss) Aquaculture, 113(4): 339- 353.

FAO. 2000. http://www.fao.org/fi/statist /fisoft/fishplus.asp #Download.

Folch, J., Lees, M. and Sloane Stanley, G.H. 1957. A simple method for the isolation and purification of total lipids from animal tissues. J. Biol. Chem., 226: 497-509.

Goddard, S. 1996. Feed Management in Intensive Aquaculture. Printed in the United States of America, Includes bibliographical references and index, Chapman and Hall Press, NewYork, 194 pp.

Halver, J.E. 1972. Fish Nutrition. Academic Press. London: 713 pp.

Kiesling, A., Pickova, J., Johansson, L., Asgard, T., Storebakken, T. and Kiessling, K.H. 2001. Changes in fatty acid composition in muscle and adipose tissue of farmed rainbow trout (Oncorhynchus mykiss) in relation to ration and age. Food Chemistry, 73: 271-284.

Koven, W.M., Tandler, A., Sklan, D. and Kissil, G.W. 1993. The association of eicosapentaenoic and docosahexaenoic acids in the main phospholipids of different-age Sparus aurata larvae with growth. Aquaculture, 116: 71-82.

NRC (National Research Council) 1981. Nutrient Requirements of Coldwater Fishes. National Academic Press. Washington D.C.: VII+63 pp

Otha, M. and Watanabe, T. 1996. Energy requirements for maintenance of body weight and activity and for maximum growth in rainbow trout. Fisheries Science, 62 (5): 737-744.

Reinitz, G. and Yu, T.C. 1981. Effects of dietary lipids on growth and fatty acid composition of rainbow trout (Salmo gairdneri) Aquaculture, 22: 299-366.

Ricker, W.E. 1979. Growth Rates and Models. W.S Hoar, D.J. Randall and J.R. Brett (Eds.) Fish Physiology, Vol.8. Academic Press, New York: XVII+786 pp.

Rouhonen, K., Vielma, J. and Grove, D.J. 1998. Growth and food utilization of rainbow trout (Oncorhynchus mykiss ) fed low-fat herring and dry diets enriched with fish oil. Aquaculture, 163: 275-281.

Sanz, A., Morales, A.E., De la Higuera, M. and Cardente, G. 1994. Sunflower meal compared with soybean meal as partial substitutes for fishmeal in rainbow trout (Oncorhynchus mykiss) diets: protein and energy utilization. Aquaculture, 128: 287 -300.

Sargent, J.R., Mcevoy, L.A. and Bell, J.G. 1997. Requirements, presentation and sources of polyunsaturated fatty acids in marine fish larval feeds. Aquaculture, 155: 117-127.

Sümbüloğlu, K. and Sümbüloğlu, V. 1998. Biyoistatistik. Hatipoğlu Yayınları 53 (8. baskı). Hatipoğlu yayınevi, Ankara. 269 pp.

Şener, E. and Yıldız, M. 2000. Aquaculture potential and fish feed production in Turkey. World Aquaculture, 3(3): 52-53.

Tanakol, R., Yazıcı, Z., Şener, E. and Sencer, E. 1999. Fatty acid composition of 19 species of fish from the Black Sea and the Marmara Sea. Lipids, 34 (3): 291-297.

Watanabe, T. 1996. Nutrition and Growth in Intensive Fish Farming. C.J. Shepherd and N.R. Bromage (Ed.), BSP Professional Books, Oxford: 154–198.

Yıldız, M. and Şener, E. 1997. Effect of Dietary Supplementation with Soybean Oil, Sunflower Oil or Fish Oil on the Growth of Seabass (Dicentrarchus labrax L. 1758). Proceedings of the Workshop of the CIHEAM Network on Technology of Aquaculture in the Mediterranean (TECAM), Jointly Organized by CIHEAM, FAO and IEO Mazarron (Spain), 24-26 June 1996. Sci. Eds. A. Tacon, B. Basurco, 225-233.

Zar, J.H. 1984. Biostatistical Analysis. Prentice-Hall, Englewood Cliffs, NJ, 718 pp.