Evaluation of selected feeds differing in dietary lipids levels in feeding juveniles of wels catfish, Silurus glanis L.

• Autorzy: Mazurkiewicz J , Przybyl A. , Golski J.
• Języki publikacji: EN

Abstrakty

EN

Background. Development of modern aquaculture and the increasing consumer demand provoke improvements in the complex breeding technologies of economically valuable fish species. Wels catfish, Silurus glanis L. (known also as the European catfish), because of its breeding and consumption values, becomes an increasingly common object of breeding. The objective of the presented work was the evaluation of selected feeds differing in dietary lipids levels applied in rearing the wels catfish fry under controlled conditions. Materials and Methods. The feeding trial (60 days) was carried out with the wels catfish fry, weighing on average 55 g. The experiment was conducted under controlled conditions in an aquarium hall in 60-L flow-through tanks. During the growth test, the fish were given four commercial feeds of the same protein amount (45%) and graded fat levels (15%, 20%, 25%, and 30%). In the final evaluation of the feeding tests, the following rearing effectiveness indices were used: food conversion ratio (FCR), specific growth rate (SGR), protein efficiency ratio (PER), protein retention (PR), lipid retention (LR), and survival rate (SR). Conclusions were drawn on the basis of statistical analysis using Statistica computer software. Results. The wels catfish fed 20%-fat-content feed attained the highest individual weights. The other treatments yielded statistically significantly lower (P < 0.05) body weights. No statistically significant differences were found between the mean values of the specific growth rate (SGR). The values of feed conversion ratio (FCR) and protein efficiency ratio (PER) were approximately equal in the individual groups. The protein retention attained values from 28.2% to 33.0%, while fat retention ranged from 11.8% to 24.2%. No mortalities were recorded. The amount of fat in all groups increased significantly after the termination of the growth. The increase of fat amount in the feed was not correlated with the growth of fat amount in the fish body. The levels of the other body components increased, but no differences between the groups were found. Conclusion. Differentiated amounts of dietary lipids in the diet did not exert any effect on the rate of fish growth or on the proper utilization of the nutritive components in feeds.

Słowa kluczowe

PL

wels catfish; European catfish; Silurus glanis; feeding; lipid; dietary lipid; animal breeding; consumption value; feed; lipid level; juvenile; animal growth; fish; fish farmer

• Wydawca: -
• Czasopismo: Acta Ichthyologica et Piscatoria
• Rocznik: 2008
• Tom: 38
• Numer: 2
• Opis fizyczny: p.91-96,ref.

Twórcy

autor

Mazurkiewicz J

• Division of Inland Fisheries and Aquaculture, University of Life Sciences in Poznan, Poznan, Poland

autor

Przybyl A.

autor

Golski J.

Bibliografia

• Bogut I., Has-Schön E., ČačićM.,Milaković Z., Novoselić D.,Brkić S. 2002. Linolenic acid supplementation in the diet of European catfish (Silurus glanis): effect on growth and fatty acid composition. Journal of Applied Ichthyology 18:1–6.
• Bolliet V., Aranda A., Boujard T. 2001. Demand-feeding rhythm in rainbow trout and European catfish.Synchronization by photoperiod and food availability.Physiology and Behavior 73: 625–633.
• Boujard T. 1995. Diel rhythms of feeding activity in the European catfish, Silurus glanis. Physiology and Behaviour 58:641–645.
• Cowey C.B., Sargent J.R. 1979. Nutrition. In: Hoar W.S.,Randall D.J., Brett J.R. (eds.) Fish physiology. Vol. VIII.Bioenergetics and growth. Academic Press, New York.
• Filipiak J., Trzebiatowski R., Sadowski J. 1993. Wpływ różnej zawartości białka ogólnego w paszach na wzrost i skład chemiczny ciała suma europejskiego (Silurus glanis L.)chowanego w sadzach w wodzie pochłodniczej. [The effects of different protein levels on feed utilization and body composition of wels (Silurus glanis L.) cage reared in cooling water.]Zeszyty Naukowe Akademii Rolniczej w Szczecinie (156):43–54. [In Polish.]
• Has-Schön E., Bogut I., Kralik D., Vuković B. 2004. Mutual influence of protein and lipid feed content on European catfish (Silurus glanis L.) growth. Journal of Applied Ichthyology 20: 92–99.
• Jankowska B., Zakęś Z., Żmijewski T., Ulikowski D.,Kowalska A. 2004. Impact of diet on the fatty acids profile of European catfish (Silurus glanis L.). Archives of Polish Fisheries 12: 99–110.
• Kaushik S.J. 1995: Nutrient requirements, supply and utilization in the context of carp culture. Aquaculture 129: 225–241.
• Linhart O., Štěch L., Švarc J., Rodina M., Audebert J.P.,Grecu J., Billard R. 2002. The culture of the European catfish,Silurus glanis, in the Czech Republic and in France. Aquatic Living Resources 15: 139–144.
• Mareš J., Wognarová S., Spurný P. 2003. Evaluation of production efficiency of selected feed mixes at intensive culture of European wels (Silurus glanis L.). Acta Scientiarum Polonorum, Seria Piscaria 2 (1): 183–194.
• Plakas S.M., Lee T.-C.,Wolke R.E., Meade T.L. 1985. Effect of Maillard browning reaction on protein utilization and plasma amino acid response by rainbow trout (Salmo gairdneri).Journal of Nutrition 115: 1589–1599.
• Proteau J.P., Hilge V., Linhart O. 1996. Present state and prospects of the aquaculture of catfishes (Siluroidei) In Europe. Aquatic Living Resources 9: 229–235.
• Randuz-Neto J., Corraze G, Bergot P., Kaushik S.J. 1993.Estimation of essential fatty acid requirements of common carp larvae using semipurified artificial diets. Pp. 5–6.In: Workshop on the fatty acid metabolism in the carp.International symposium on the carp. 6–9 September 1993,Budapest, Hungary.
• Sadowski J. 2005. Technologia sadzowego chowu suma europejskiego (Silurus glanis L.) w wodach pochłodniczych na przykładzie kanału zrzutowego elektrowni „Dolna Odra”.[European catfish (Silurus glanis L.) cage rearing technology in cooling water of the Dolna Odra Power Plant.] Pp.55–61. In: Zakęś Z. (ed.) Rozród, podchów, profilaktyka ryb sumowatych i innych gatunków. [Breading, culture, and prophylaxis of siluroid- and other fishes.] Wydawnictwo IRS, Olsztyn. [In Polish.]
• Siwicki A. 1984. New anaesthetic for fish. Aquacultue 38:171–176.
• Stickney R.R., Hardy R.W. 1989. Lipid requirements of some warmwater species. Aquaculture 79: 149–156.
• Takeuchi T., Watanabe T. 1977. Requirement of carp for essential fatty acids. Nippon Suisan Gakkaishi = Bulletin of the Japanese Society of Scientific Fisheries 43: 541–551.
• Ulikowski D. 2003. Towarowy tucz suma europejskiego (Silurus glanis L.) w obiegach recyrkulacyjnych. [Intensive production of European catfish (Silurus glanis L.) in water recirculating systems.] Komunikaty Rybackie 2003 (2):10–12. [In Polish.]
• Ulikowski D. 2005. Technologia chowu suma europejskiego (Silurus glanis L.) w obiegach recyrkulacyjnych. [Reading technology of European catfish (Silurus glanis L.) in water recirculating systems.] Pp. 45–54. In: Zakęś Z. (ed.) Rozród,podchów, profilaktyka ryb sumowatych i innych gatunków.[Breeding, culture, and prophylaxis of siluroid- and Rother fishes.] Wydawnictwo IRS, Olsztyn. [In Polish.]
• Ulikowski D., Borkowska I., Szczepkowska B. 1998. Wyniki basenowego i stawowego chowu larw i narybku suma europejskiego (Silurus glanis L.) w Doświadczalnym Ośrodku Zarybieniowym „Dgał”. [Rearing effects of European catfish (Silurus glanis L.) larvae and fry in basins and ponds in the Dgał Experimental Stocking Station.]Komunikaty Rybackie 1998 (2): 3–6. [In Polish.]
• Wolnicki J., Myszkowski L. 1998. Survival, growth and ford conversion in European wels, Silurus glanis L., larvae fed commercial dry diets at 28oC. Polskie Archiwum Hydrobiologii = Polish Archives of Hydrobiology 45:531–538.
• Wolnicki J., Przybył A., Starzonek I. 1998: Evaluation of five dry diets for initial feeding of European wels, (Silurus glans L.), larvae under controlled conditions. Archives of Polish Fisheries 6 (1): 123–133.
• Vallod D. 1987. Le silure (Silurus glanis). Bulletin de Association pour le Développement de l’Aquaculture No. 16.