Mustafa YILDIZ, Erdal ŞENER, Metin TİMUR

Effects of variations in feed and seasonal changes on body proximate composition of wild and cultured sea bass (Dicentrarchus labrax L.)

In this study, the effects of dietary composition and seasonal variation on fillet composition and some morphological indices of wild and cultured sea bass (average weight, 361 g) were investigated. Experimental fish were fed with two commercial pelleted feeds and two commercial extruded feeds in summer, winter and spring seasons of year 2004 at four marine fish farms in Aegean region in Turkey. No significant differences were found among the proximate composition of feed samples, seasonally. The crude protein content (about 45%) in the commercial feeds was found similar (P>0.05), whereas the crude fat content (about 20 %) in the extruded feeds was significantly higher (P<0.05) than those (about 13 %) in pelleted feeds. No significant differences (P>0.05) were found in the condition factors (CF) of the cultured and wild sea bass neither among different feeds nor among different seasons. The viscerosomatic index (VSI) and hepatosomatic index (HSI) values or visceral and liver lipid content of fish fed with the extruded feeds were higher (P<0.05) than in those fed with the pelleted feeds and wild fish. The VSI and HSI values of wild fish were similar (P>0.05) to the values of fish fed with lower fat diet. The visceral lipid content of cultured and wild fish significantly increased in summer, while the liver lipid content significantly increased in winter (P<0.05). No significant differences (P>0.05) were found in the ash content of the cultured and wild sea bass neither among different feeds nor among different seasons. Crude protein levels of the fish fillet did not differ (P>0.05) among the fish fed with different commercial feeds or during different seasons, although the crude protein levels in the cultured fish were significantly higher (P<0.05) than that of the wild fish. A high positive correlation (r = 0.84, P<0.01) was found between the fillet lipid levels and the dietary lipid content. Furthermore, the lipid content of cultured fish fillet was not affected (P>0.05) by different seasons whereas the fillet lipid content of the wild fish during summer was slightly higher (P<0.05). Finally, the results of chemical analysis showed that the fillet composition of cultured and wild sea bass were good sources of protein and lipid in each of the three seasons.

Anahtar Kelimeler:

kültür balığı, vücut ölçümleri, yemler, balık beslenmesi, besin analizi, levrek, Dicentrarchus labrax, yabani hayvanlar, mevsimsel değişimler

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1. Alam, S., Teshima, S., Yaniharto, D., Koshio, S. and Ishikawa, M. 2002. Influence of different dietary amino acid patterns on growth and body composition of juvenile Japanese flounder, Paralichthys olivaceus. Aquaculture, 210: 359-369.

2. AOAC. 1995. Official Methods of analysis of the association of official analytical chemists. In: P. Cunniff (Ed.), International, VA. Vol II Chapter 49, Arlington, Virginia, United States: 1-49.

3. Ballestrazzi, R., Lanari, D., D'Agaro, E. and Mion, A. 1994. The effect of dietary protein level and source on growth, body composition, total ammonia and reactive phosphate excretion of growing sea bass {Dicentrarchus labrax). Aquaculture, 100: 107-123.

4. Ballestrazzi, R., Lanari, D. and D'Agaro, E. 1998. Performance, nutrient retention efficiency, total ammonia and reactive phosphorus excretion of growing European sea bass {Dicentrarchus labrax, L.) as affected by diet processing and feeding level. Aquaculture, 161: 55-65.

5. Ballestrazzi, R. and Lanari, D. 1996. Growth, body composition and nutrient retention efficiency of growing sea bass {Dicentrarchus labrax, L.) fed fish oil or fatty acid Ca salts. Aquaculture, 139: 101-108.

6. Barnabe, G. 1990. Rearing bass and gilthead-bream. In: G. Barnabe (Ed.), Aquaculture Vol. II. Ellis Harwood, London: 647-687.

7. Dias, J., Alvarez, M.J., Diez, A., Arzel, J., Corraze, G., Bautista, J.M. and Kaushik, S.J. 1998. Regulation of hepatic lipogenesis by dietary protein/energy in juvenile european seabass {Dicentrarchus labrax). Aquaculture, 161: 169-186.

8. Eroldoğan, O.T., Kumlu, M. and Aktaş, M. 2004. Optimum feeding rates for European sea bass Dicentrarchus labrax L. reared in seawater and freshwater. Aquaculture, 231: 501-515.

9. FAO. 2005. FAO Yearbook of Fishery Statistics: Aquaculture Production. Rome: Food and Agricultural Organization of the United Nations.

10.Grigorakis, K., Alexis, M:N., Taylor, K.D.A. and Hole, M. 2002. Comparison of wild and cultured gilthead sea bream {Sparus aurata); composition, appearance and seasonal variation. International Journal of Food Sciences Technologies, 37: 477-484.

11.Guinea, J. and Fernandez, F. 1997. Effect of feeding frequency, feeding level and temperature on energy metabolism in Sparus aurata. Aquaculture, 148: 125-142.

12.Hamre, K., Lie, 0. and Sandnes, K. 2003. Seasonal development of nutrient compositions, lipid oxidation and colour of fillets from Norwegian spring-spawning herring {Clupea harengus L.). Food Chemistry, 82: 441-446.

13.Hidalgo, F. and Alliot, E. 1988. Influence of water temperature on protein requirement and protein utilization in juvenile sea bass, Dicentrarchus labrax. Aquaculture, 72: 115-129.

14.Hilton, J.W. 1982. The effect of pre-fasting diet and water temperature on liver glycogen and liver weight in' rainbow trout {Salmo- gairdneri R.) during fasting.Journal of Fish Biology, 20: 69-78.

15.Jobling, M., Koskela, J. arid Salvolainen, R. 1998. Influence of dietary fat level and increased adiposity on growth and fat deposition in rainbow trout, Oncorhynchus' mykiss (Walbaum). Aquaculture Researches, 29: 601-607.

16.Lanari, D., Poli, B.M., Ballestrazzi, R., Lupi, P., D'Agaro, E. and Mecatti, M. 1999. The effects of dietary fat and' NFE levels on growing European sea bass {Dicentrarchus labrax L.) growth rate, body and fillet composition, carcass traits and nutrient retention efficiency. Aquaculture, 179: 351-364.

17.Lanari, D., Ballestrazzi, R. and D'Agaro, E. 1998. The effect of dietary fat and NFE level on growing European seabass {Dicentrarchus labrax) I: Growth rate, body composition and nutrient retention efficiency. Abstracts of VIII Int. Symp. On Nutrition and Feeding Of Fish, Las Palmas, Gran Canaria, Spain.

18.Levesque, H.M, Moon, T.W., Campbell, P.G.C. and Hontela, A. 2002. Seasonalvariation in carbohydrate and lipid metabolism of yellow perch {Perca flavescens) chronically exposed to metals in the field. Aquatic Toxicology, 60: 257-267.

19.Lie, 0. 2001. Flesh quality - the role of nutrition.Aquaculture Researches, 32: 341-348.

20.Lovell, R.T. 1991. The use of soybean products in diets for aquaculture species: Revised, In: D.M. Akiyama and R.K.H. Tan (Ed.). Proceeding of the Aquaculture Feed Processing and Nutrition Workshop. American Soybean Association, Singapore: 173-187.

21.Lupatsch, I., Kissil, G.W. and Sklan, D. 2003. Comparison of energy and protein efficiency among three fish species gilthead sea bream {Sparus aurata), European sea bass {Dicentrarchus labrax) and white grouper {Epinephelus aeneus): energy expenditure for protein and lipid deposition. Aquaculture, 225: 175-189.

22.Mente, E., Deguara, S., Santos, M.B. and Houlihan, D. 2003. White muscle free amino acid concentrations following feeding a maize gluten dietary protein in Atlantic salmon {Salmo salar L.). Aquaculture, 225: 133-147.

23.Metailler, R., Dehapiot, T., Huevan, C. and Vendeville, J.E. 1980. Influence of the feeding level on growth, feed conversion, protein efficiency and chemical composition of juvenile European sea bass {Dicentrarchus labrax). Procesing World Mariculture Society, 11:436-444.

24.NRC (National Research Council) 1993. Nutrient Requirements of Fish. National Academy Press, Washington, D.C., 114 pp.

25.Peres, H., Gonçalves, P. and Oliva-Teles, A. 1999. Glucose tolerance in gilthead seabream {Sparus aurata) and European seabass {Dicentrarchus labrax). Aquaculture, 179: 415-423.

26.Peres, H. and Oliva-Teles, A. 1999. Effect of dietary lipid level on growth performance and feed utilization by European sea bass Juveniles {Dicentrarchus labrax). Aquaculture, 179: 325-334.

27.Perez, L., Gonzalez, H., Jover, M. and Fernandez-Carmona, J. 1997. Growth of European sea bass fingerlings {Dicentrarchus labrax) fed extruded diets containing varying levels of protein, lipid and carbohydrate. Aquaculture, 156: 183-193.

28.Person-Le Ruyet, J., Mahe, K., Le Bayon, N. and Delliou,H. 2004. Effects of temperature on growth and metabolism in a Mediterranean population of European sea bass, Dicentrarchus labrax. Aquaculture, 237: 269-280.

29.Refstie, S., Storebâkken, T., Baeverfjord, G. and Roem, A.J. 2001. Long-term protein and lipid growth of Atlantic salmon {Salmo salar) fed diets with partial replacement of fish meal by soy protein products at medium or high lipid level. Aquaculture, 193: 91-106.

30.Ricker; WiE. 1979. Growth rates and models. In: W.S Hoar,D.J. Randall and J,R. Brett (Eds.), Fish Physiology,Vol.8. Academic Press, New York: 677-743.

31.Shirai, N., Suzuki, H., Tokairin, S., Ehara, H. and Wada, S. 2002. Dietary and seasonal on the dorsal meat lipid composition of Japanese (Silurus asotus) and Thai catfish {Clarias macrocephalus and hybrid Clarias macrocephalus and Clarias galipinus). Comperative Biochemistry and Physiolgy, Part A, 132: 609-619.

32.Yıldız, M. and Şener, E. 2003. Farklı yemlerle beslenen gökkuşaği alabaliği (Oncorhynchus mykiss) ve deniz levreği (Dicentrarchus labrax)'nde vücut kompozisyonu. İ.Ü. Su Ürünleri Dergisi, 15: 47-56.

33.Zar, J.H. 1984. Biostatistical Analysis. Prentice-Hall, Englewood Cliffs, New Jersey, 718 pp.

34.Wilson, R.P. 2002. Amino acids and proteins. In: Halver, J.E., Hardy, R.W. (Editors). Fish Nutrition, Third Edition, Academic Press, San Diego: 144-175.