The Effects of Feeding Level and Stocking Density on the Growth and Feed Efficiency of Himri Barbel Fry, Barbus luteus (Heckel, 1843)
Two stocking densities (20 and 40 fry/80-l tank) with 4 feeding rates (2.5%, 5.0%, 7.5%, and 10.0% body weight/day) were used to determine the optimum feeding level for himri barbel fry during a 60-day culture period. Water quality parameters (temperature, dissolved oxygen, pH, and total ammonia nitrogen) were monitored during the experiment. Final body weight and specific growth rate (SGR) was significantly lower with the 2.5% feeding rate than with the others, at both stocking densities; however, no significant differences were observed between the other feeding rates and between stocking densities. The best feed conversion ratio (FCR) of 1.37 was achieved with the 2.5% feeding rate and stocking density of 40 fry/80 l; yet, in terms of total yield and survival the optimal FCR of 1.50 was obtained with the 5.0% feeding rate and 40 fry/80 l. At the 10.0% feeding rate survival rates were significantly lower. Both feeding ratio and stocking density also affected water quality parameters.
The Effects of Feeding Level and Stocking Density on the Growth and Feed Efficiency of Himri Barbel Fry, Barbus luteus (Heckel, 1843)
Two stocking densities (20 and 40 fry/80-l tank) with 4 feeding rates (2.5%, 5.0%, 7.5%, and 10.0% body weight/day) were used to determine the optimum feeding level for himri barbel fry during a 60-day culture period. Water quality parameters (temperature, dissolved oxygen, pH, and total ammonia nitrogen) were monitored during the experiment. Final body weight and specific growth rate (SGR) was significantly lower with the 2.5% feeding rate than with the others, at both stocking densities; however, no significant differences were observed between the other feeding rates and between stocking densities. The best feed conversion ratio (FCR) of 1.37 was achieved with the 2.5% feeding rate and stocking density of 40 fry/80 l; yet, in terms of total yield and survival the optimal FCR of 1.50 was obtained with the 5.0% feeding rate and 40 fry/80 l. At the 10.0% feeding rate survival rates were significantly lower. Both feeding ratio and stocking density also affected water quality parameters.
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- 1. Epler, P., Bartel, R., Chyp, J., Szczerbowski, J.A.: Diet of selected fish species from the Iraqi lakes Tharthar, Habbaniya and Razzazah. Arch. Pol. Fish., 2001; 9: 211-223.
- 2. Al-Daham, N.K., Al-Dubaikel, A.Y., Wahab, N.K.: The influence of stocking density on the growth of the common carp (Cyprinus carpio) in the earthen brackish water ponds in Basrah. Basrah J. Agric. Sci., 1991; 4: 199-207. (article in Arabic with an abstract in English)
- 3. Al-Hazzaa, R., Hussein, A.: Initial observations in Himri (Barbus luteus, Heckel) propagation. Turk. J. Fish. Aquat. Sci., 2003; 3: 41-45.
- 4. Al-Hazzaa, R., Hussein, A.: Larval development of Himri, Barbus luteus (Cyprinidae: Cypriniformes) reared in the laboratory. Turk. J. Zool., 2007; 31:27-33.
- 5. Kaya Gokcek, C., Akyurt, I.: The effect of stocking density on yield, growth, and feed efficiency of Himri Barbel (Barbus luteus) nursed in cages. Israeli J. Aquacult., 2007; 59: 99-103.
- 6. Kaya Gokcek, C., Mazlum, Y., Akyurt, I.: Effect of feeding frequency on the growth and survival of Himri Barbel Barbus luteus (Heckel, 1843), fry under laboratory conditions. Pak. J. Nutr., 2008; 7: 66-69.
- 7. A.O.C.A.: Official methods of analysis. Association of Official Analytical Chemists. 15th edn. Virginia, USA. 1990.
- 8. SPSS: SPSS® for Windows base system user’s guide, release 10,0, Chicago, USA. 2000.
- 9. Smith, H.T., Schreck, C.B., Maughan, O.E.: Effect of population density and feeding rate on the fathead minnow Pimephales promelas. J. Fish Biol., 1978; 12: 449-455.
- 10. Huang, W.B., Chiu, T.S.: Effects of stocking density on survival, growth, size variation, and production of tilapia fry. Aquacult. Res., 1997; 28: 165-173.
- 11. Martin, R.M., Wertheimer, A.: Adult production of Chinook salmon reared at different densities and released as two smolt sizes. Prog. Fish Cult., 1989; 51: 194-200.
- 12. Tepe, A.Y.: Production characteristics and changes in fatty acids profiles of Nile tilapia (Oreochromis niloticus) using algae as a food source in partitioned aquaculture system. Turk. J. Vet. Anim. Sci., 2005; 29: 211-217.
- 13. Haylor, G.S.: Controlled hatchery production of Clarias gariepinus (Burchell 1822): growth and survival of fry at high stocking density. Aquacult. Fish. Manag., 1991; 22: 405-422.
- 14. Li, S., Ayles, G.B.: Preliminary experiments on growth, survival, production and interspecific interactions of walleye (Stizostedion vitreum) fingerlings in constructed earthen ponds in the Canadian prairies. Canadian Technical Report on Fisheries and Aquatic Sciences, 1981; No. 1041.
- 15. Fox., M.G., Flowers, D.D.: Effect of fish density on growth, survival and food consumption by juvenile walleyes in rearing ponds. Transact. Am. Fish. Soc., 1990; 119: 112-121.
- 16. Tepe, Y., Boyd, C.E.: Nitrogen fertilization of golden shiner ponds. North Am. J. Aquacult., 2002; 64: 284-289.
- 17. Cruz, E.M., Ridha, M.T.: Survival rates of tilapia Oreochromis spilurus (Günther) fingerlings reared at high densities during winter using warm underground sea water. Aquacult. Res., 1995; 26:307-309.
- 18. NRC: Nutrient Requirement of Fish. National Research Council, National Academy Press, Washington, DC. 1993.
- 19. Boyd, C.E., Tucker C.S.: Pond Aquaculture Water Quality Management. Kluwer Academic Publishers. USA. 1998.
- 20. Jingbo, X., Xunfeng, M., Wenli, H., Xiaoyu, H.: Effects of temperature and ammonia on silver carp, bighead carp, grass carp and common carp. China Environ. Sci., 1994; 14: 214-218.