Sebahattin ERGÜN, Derya GÜROY, Haluk TEKEŞOĞLU, Betül GÜROY, İhsan ÇELİK, A. Adem TEKİNAY, Musa BULUT

Optimum dietary protein level for blue streak hap, Labidochromis caeruleus

Bu araştırmada, akvaryum balıklarından sarı prenses (Labidochromis caeruleus) balığının yemdeki optimum protein ihtiyacı incelenmiştir. Üç tekerrürlü olarak yürütülen çalışmada, sarı prenses yavruları, protein oranı %30 ile %45 arasında değişen dört farklı eşit enerji içeriğine sahip yemlerle sekiz hafta süreyle beslenmiştir. Yavru balıklar (0,85 g), su sıcaklığı 27,5°C olan biyolojik filtreli ve 50 L su hacimli 12 adet akvaryuma stok yoğunluğu 10 adet balık/akvaryum olacak şekilde konmuştur. Deneme sonunda elde edilen veriler, yemdeki protein oranının balıkların deneme sonu ağırlığını, ağırlık artışını, spesifik büyüme oranını ve yemden yararlanmayı önemli derecede etkilediğini göstermiştir. Gruplar içerisinde en iyi büyüme %40 protein içeren yemde görülmekle beraber, %35 ve %45 proteinli yemlerle beslenen balıklarla bu grup arasında istatistiksel olarak önemli bir fark yoktur (P>0,05). Spesifik büyüme ve yemden yararlanma oranları %30 proteinden %40 proteinli gruplara doğru artmış ve sonra %45 proteinde düşmüştür. Grupların yem tüketimleri arasında istatistiksel olarak önemli farklılıklar bulunmuştur (P

Anahtar Kelimeler:

büyüme, protein gereksinimi, süs balıkları, balık beslenmesi

Sarı prenses balığı (Labidochromis caeruleus) yeminde optimum protein oranı

An experiment was designed to determine the optimum dietary protein level of a freshwater ornamental fish, Blue streak hap (Labidochromis caeruleus). Four isocaloric fish meal based diets ranging from 30% to 45% in protein were fed to triplicate groups of Blue streak hap for 8 weeks. Fish (initial weight, 0.85 g) were reared in twelve 50 L aquarium with biological filter and controlled temperature (27.5°C), in stocking density of ten fish/aquarium. Results showed that dietary protein level significantly influenced final weight, weight gain and specific growth rate of fish. Maximum growth of fish was observed in the 40% protein diet, although this was not significantly different from the 35% and 45% protein diets (P>0.05). Specific growth rate and feed efficiency increased from 30% to 40% protein, and thereafter decreased for diet 45% protein. There were statistically significantly differences in feed intake among treatments (P<0.05). Fish fed with the highest protein diet had lower percentage daily feed consumption values than those of fish fed with the lowest protein diet. Under the experimental conditions applied, juvenile blue streak hap, L. Caeruleus, appear to require more than 35% dietary protein for optimized growth.

Keywords:

growth, protein requirement, ornamental fishes, fish feeding,

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AOAC, 1990. Offical Methods of Analysis, 15th edition Association of Official Analytical Chemists. Arlington, VA., 1298 pp.
Chong, A.S.C., Hashim, R. and Ali, A.B. 2000. Dietary protein requirements for discus (Symphysodon spp.). Aquac. Nutr., 6: 275–278.
De Silva, S.S. and Anderson, T.A. 1995. Fish Nutrition in Aquaculture. Aquaculture Series, Chapman & Hall, London, 346 pp.
Debnath, D., Pal, A.K., Sahu, N.P., Jain, K.K., Yengkokpam, S. and Mukherjee, S.J. 2005. Effect of dietary microbial phytase supplementation on growth and nutrient digestibility of Pangasius pangasius (Hamilton) fingerlings. Aquac. Res., 36: 180–187.
Elangovan, A. and Shim, K.F. 1997. Growth response of juvenile Barbodes altus fed isocaloric diets with variable protein levels. Aquaculture, 158: 321–329.
El-Sayed, A.M. and Teshima, S. 1992. Protein and energy requirements of Nile tilapia, Oreochromis niloticus, fry. Aquaculture, 103: 55-63.
Jauncey, K. 1982. The effects of varying dietary protein level on the growth, food conversion, protein utilization and body composition of juvenile tilapias (Sarotherodon mossambicus). Aquaculture, 27: 43– 54.
Kim, J.D. and Lall, S.P. 2001. Effects of dietary protein level on growth and utilization of protein and energy by juvenile haddock (Melanogrammus aeglefinus). Aquaculture, 195: 311-319.
Kim, K-W., Wang, X., Choi, S-M, Park, G-J. and Bai, S.C. 2004. Evaluation of optimum dietary protein-toenergy ratio in juvenile olive flounder Paralichthys olivaceus (Temminck et Schlegel). Aquac. Res., 35: 250-255.
Kruger, D.P., Britz, P.J. and Sales, J. 2001. Influence of varying dietary protein content at three lipid concentrations on growth characteristics of juvenile wordtails (Xiphophorus helleri Heckel 1848). Aquar. Sci. Cons., 3: 275–280.
Lochmann, R.T. and Phillips, H. 1994. Dietary protein requirement of juvenile golden shiners (Notemigonus crysoleucas) and goldfish (Carassius auratus) in aquaria. Aquaculture, 128: 277–285.
Martinez-Palacios, C.A., Harfush-Melendez, M., Chavez- Sanchez, C. and Ross, L.G. 1996. The optimum dietary protein level for the Mexican cichlid Cichlasoma uropthalmus (Gunther): a comparison of estimates derived from experiments using fixed-rate feeding and satiation feeding. Aqua. Nut., 2: 11–20.
NRC (National Research Council)., 1993. Nutrient Requirements of Fish. National Academy of Sciences, Washington D.C., 128 pp.
Olvera-Novoa, M.A., Gasca-Leyva, E. and Martinez- Palacios, C.A. 1996. The dietary protein requirements of Cichlasoma synspilum Hubbs, 1935 (Pisces: Cichlidae) fry. Aquac. Res., 27: 167–173.
Sales, J. and Janssens, G.P.J. 2003. Nutrient requirements of ornamental fish Aquat. Living Resources, 16: 533– 540.
Shim, K.F. and Chua, Y.L. 1986. Some studies on the protein requirement of the guppy, Poecilia reticulata (Peters). J. Aquaricult. Aquat. Sci., 4: 79–84.
Shim, K.F., Landesman, L. and Lam, T.J. 1989. Effect of dietary protein on growth, ovarian development and fecundity in the dwarf gourami, Colisa lalia (Hamilton). J. Aqua. Trop., 4: 111-123.
Siddiqui, A.Q., Howlader, M.S. and Adam, A.A. 1988. Effects of dietary protein levels on growth, feed conversion and protein utilization in fry and young Nile tilapia, Oreochromis niloticus. Aquaculture, 70: 63-73.
Zar, J.H. 2001. Biostatistical Analysis. Fourth edition. Prentice-Hall, Inc., Upper Saddle River, NJ., 931 pp.
Zuanon, J.A., Salaro, A.L., Balbino, E.M., Saraiva, A., Quadros, M. and Fontanari, R.L. 2006. Dietary crude protein levels of freshwater angelfish fry. R. Bras. Zootec., 35: 1893-1896.