Effect of different ration levels for grass carp (Ctenopharyngodon idella v.) fingerlings in experimental conditions
Keywords:
feeding, nutrition, performance, rationAbstract
The experiment was carried out in the Aquaculture Laboratory of State University of Maringá with the objective of evaluating the ideal ration levels for grass carp fingerlings. Eighty fingerlings were used, with initial medium weight of 0.73 ± 0.10 g and initial medium length of 4.4 ± 0.22 cm, divided in 16 net-cages distributed in four ponds (1,000 L), with five fish each. The design was completely randomized with four treatments and four replications (1, 3, 5 and 7% of the fish biomass). The evaluated parameters were final mean weight (FW), weight gain (WG), feed conversion (FC), final mean length (FL), uniformity (UNI) and survival (S). The (FC) and (WG) presented quadratic relation (P<0.05), with maximum point 6.17 and 6.0%, respectively. The (FL) exhibited positive linear relation (P<0.05) when the ration level increased. The (UNI) and (S) did not reveal significant differences (P>0.05) between the treatments. Physical and chemical parameters remained within appropriate limits. It was possible to conclude that ration distribution in a proportion of 6.0% of the fish biomass for grass carp fingerlings is appropriate to a better development and survival in an average temperature of 26°C.
References
COELHO, S.,R. 1997 Situação atual e perspectivas da indústria de rações para organismos aquáticos. In: SIMPÓSIO SOBRE MANEJO E NUTRIÇÃO DE PEIXES, Piracicaba, 1997. Anais.... Piracicaba CBNA, p. 102-116.
EGNA, H. S. e BOYD, C. E. 1997 Dynamics of pond aquaculture. Boca Raton: CRC Press, 342p.
FONTAINE, P.; GARDEUR, J., N., KESTEMONT, P.; GEORGES, A. 1997 Influence of feeding level on growth, intraspecific weight variability and sexual growth dimorfhism of Eurasian perch Perca fluvialis L. reared in a recirculation system.Aquaculture. Amsterdam, 157(2): 1-8.
FURUYA , W. M. et al. 1998 Dietas peletizada e extrusada para machos revertidos de tilápia do Nilo (Oreochromis niloticus) na fase de terminação.Ciência Rural, Santa Maria, 28(3): 483-487.
HAJRA, A. 1987 Biochemical investigations on the protein-calorie availability in grass carp (Ctenopharyngodon idella Val.) from an aquatic weed (Ceratophylum demersum Linn.) in the tropics. Aquaculture, Amsterdam, 61(2):113-10.
HALVER, J. F. 1972 Salmonid husbandry techniques.In: Fish Nutrition Academic Press. New York and London. 719p.
JOBLING, M e BAARDIVIK, B.M. 1994 The influence of environmental manipulations on inter and intra - individual varation in food acquisition and growth performance of Artic charr Salvelinus alpinus. J. Fish Biol. London, 41:1067-1087.
KUBITZA, F. 1997 Qualidade do alimento, qualidade da água e manejo alimentar na produção de peixes. In: SIMPÓSIO SOBRE MANEJO E NUTRIÇÃO DE PEIXES, Piracicaba,1997. Anais... Piracicaba: CBNA. p. 63-116.
MEURER, F., HAYASHI, C., BOSCOLO, W. R. 2000 Digestibilidade aparente da proteína bruta, matéria seca e energia bruta de alguns alimentos protéicos para tilápia do Nilo (Oreochromis niloticus, L). In: SIMPÓSIO BRASILEIRO DE AQíÅ“ICULTURA, 11, Florianópolis, 2000. Anais...Florianópolis: SIMBRAq. CD-Rom.
MOREIRA, H. L. M. et al. 2001 Fundamentos da moderna aqüicultura. Canoas: Ed. ULBRA,. 200p.
NATIONAL RESEARCH COUNCIL. 1993 Nutrient requirements of fish. National. Washington, D. C.,USA: Academy Press.
OTUBUSIN, S. O. 1987 Effects of different levels of blood meal in pelleted feeds on tilapia, Oreochromis niloticus, production in floating bamboo net-cages. Aquaculture, Amsterdam,65(3/4): 263-266.
QUINTON, J. C. e BLAKE, R. W. 1990 The effect of feed cycling and ration level on the compensatory growth response in rainbow trout, Oncorhynchus mykiss. J. Fish Biol., London,37(1): 33-41.
ROSTAGNO, H. S.; SILVA, D. J.; COSTA, P. M. A. 1994 Composição de alimentos e exigências e nutricionais de aves e suínos (Tabelas brasileiras).Viçosa: Imprensa Universitária.
SAETHER, B. S. e JOBLING, M. 1999 The effects of ration level on feed intake and growth and compensatory growth after restricted feeding, in turbot Scophthalmus maximus L. Aquac. Research,Oxford, 30(9): 647-652.
SANTIAGO, C. B.; ALDABA, M. B.; REYES, O. S. 1987 Influence of feeding rate and diet form on growth and survival of Nile Tilapia (Oreochromis niloticus) fry. Aquaculture, Amsterdam,64(4): 277-282.
STORENBAKKEN, T. e AUSTRENG, E. 1987 Ration level for salmonids: growth, survival, body composition and feed conversion in Atlantic Salmon fry and fingerlings. Aquaculture, Amsterdam, 60(3/4):189-203.
TABATA, Y. A.; RIGOLINO, M. G.; NETO, B. C. S.; PAIVA, P.; ISHIKAWA, C. M. 1998 Influência de diferentes taxas de arraçoamento n crescimento de truta arco-íris, Salmo irideus Gibbons. B. Inst. Pesca, São Paulo, 15(1):31-38.
UNIVERSIDADE FEDERAL DE VIí"¡OSA - UFV. SAEG 1983 Sistema para análises estatísticas e genéticas. 1983. Versão 7.1. Viçosa, MG. 150p. (Manual do usuário).