Интензивно отглеждане на личинки европейски сом (Silurus glanis L.) при различна гъстота на посадката и техния ефект върху продуктивните показатели
Ключови думи :
Eвропейски сом, личинки, гъстота на посадкаАбстракт
По време на настоящото изследване са проведени две проучвания (Проучване I и Проучване II) в две последователни години чрез прилагане на една и съща схема на гъстота на
посадката. Всяко проучване е с продължителност 16 дни. Обект на експеримента са личинки на европейски сом, отглеждани във вани с постоянна проточност (0,7 l.min-1). През целия
експериментален период всички риби са хранени с „Ocean nutrition” – Канада (0,8–1,0 mm), до
насищане, по три пъти на ден. В началото и в края на всяко проучване е извършвано измерване на теглото на 50 произволно избрани индивида от всеки вариант на гъстота на посадката.
Средното тегло на личинките в началото на проучване I е в диапазона от 50,7 ± 11,9 mg до 86,2
± 20,1 mg и в началото на проучване II – от 182,5 ± 58,0 mg до 199,3 ± 70,9 mg. Броят на рибите,
използвани в проучване I е 2400, а в проучване II – 3600. Схемата на гъстота на посадката се
състои от три варианта: Вариант А (5 инд. l-1), Вариант Б (10 инд. l-1) и Вариант С (15 инд. l-1).
В проучване I всеки вариант на гъстота на посадката се прилага с едно повторение, докато в
проучване II – с две повторения за по-добър статистически анализ.
Резултатите от изследването показват, че индивидуалният прираст (IWG, mg) и оцеляемостта (SR, %) са силно повлияни от варианта на гъстота на посадката с доказана степен
на достоверност (P ≤ 0,05). И двата параметъра имат най-високи стойности при най-ниската
гъстота на посадка (Вариант A – 5 инд. l-1). Установените стойности за темповете на растеж
(AWG, DGR, SGR) за проучване I и проучване II показват, че те зависят значително от различните варианти на гъстота на посадката (P ≤ 0,05).
Литература (библиография)
Ageets, V. Y., & Dokuchaeva, S. I. (2012). Technological and biological standards for rearing European catfish in ponds in Belarus. Issues of Fisheries in Belarus, Collection of Scientific Papers, Minsk, 28(1), 88-105 (Blr).
Almazan Rueda, P. (2004). Towards assessment of welfare in African catfish, Clarias gariepinus: the first step. Fish Culture & Fisheries Group, Waginengen. Institute for Animal Sciences, 1-152 (Nl).
Barton, B. A., Morgan, J. D., & Vijayan, M. M. (2002). Physiological and condition-related indicators of environmental stress in fish. In: American Fisheries Society, Bethesda, 111-148.
Dokuchaeva, S. (2005). The technology of rearing European catfish (Silurus glanis L.) in pond farms of the Republic of Belarus. Proceedings of the National Academy of Sciences of Belarus. Series of Agricultural Sciences, 2(1), 99-105 (Blr).
Dokuchaeva, S. (2011). Development of technological regimes for the rearing of European catfish (Silurus glanis L.) in pond farms in Belarus. Proceedings of the National Academy of Sciences of Belarus. Series of Agricultural Sciences, 2 (1), 75-86 (Blr).
Dokuchaeva, S., Konchic, V., Chutaeva, A., Federova, V., Hasenevich, A., & Sennikova, D. (2003). Biological characteristics of juvenile European catfish obtained by intensive method in pond farms in the Republic of Belarus and technologically parameters of growth. Issues of Fisheries in Belarus. Collection of Scientific Papers, Minsk, 19(1), 66-72 (Blr).
Hayat, M., Nugroho, R., & Aryani, R. (2018). Influence of different stocking density on the growth, feed efficiency and survival of Majalaya common carp (Cyprinus carpio, Linnaeus 1758). F1000 Research 2018, 7, 1917 (https://doi.org/10.12688/f1000research.16875.1).
Jamroz, M., Kucharczyk, D., Kujawa, R., & Mamcarz, A. (2008). Effects of stocking density and three various diets on growth and survival of European catfish (Silurus glanis L.) larvae under intensive rearing condition. Polish Journal of Natural Sciences, 23(4), 850–857.
Kaminski, R., & Wolnicki, J. (1996). Successful breeding of European catfish, Silurus glanis L., with trout feed and some technological parameters. Komis Rybak, 6(1), 4-6 (Pl).
Koturanov, P., Usov, M., Radko, M., Gadlevskaya, N., & Astrenkov, A. (2010). Growing of European catfish larvae to a viable stage on starting compound feeds. Current Problems of the Intensive Development of Animal Husbandry, 12(1), 353-359 (Ru).
Kozlowski, J., & Poczyczynski, P. (1999). The effect of light and stocking density on the results of rearing of European catfish (Silurus glanis L.) larvae. Archives of Polish Fisheries, 7(2), 297-306.
Kozlowski, J., Mamcarz, A., Poczyczynski, P., Chybowski, L., & Jozsa, V. (1995). Rearing of European sheatfish (Silurus sglanis L.) larvae on different dry and natural food. European Aquaculture Society, 24(1), 293-297.
Krasteva, V. (2020). Influence of initial stocking density on growth performance and survival of European catfish (Silurus glanis L.) larvae under controlled conditions. Bulgarian Journal of Agricultural Science, 26(1), 248-253.
Krol, J., Flisiak, W., Urbanowicz, P., & Ulikowski, D. (2014). Growth, cannibalism, and survival relationsin larvae of European catfish, Silurus glanis (Actinopterygii: Siluriformes: Siluridae) - attempts to mitigate sibling cannibalism. Acta Ichthyologica et Piscatorial, 44(3), 191-199.
Nwipie, G. N., Erondu, E. S., & Zabbey, N. (2015). Influence of stocking density on growth and survival of post fry of the African mud catfish, Clarias gariepinus. Fisheries and Aquaculture Journal, 6(1), 1-4.
Offem, B. O., & Ikpi, G. U. (2013). Determination of optimum stocking density for Heterobranchus longifilis (Burchell, 1822) larvae in aquarium tanks. Journal of Fisheries and Aquaculture, 4(1), 52-55.
Opiyo, M. A., Ngugi, C. C., & Rasowo, J. (2014). Combined effects of stocking density and background colour on growth performance and survival of Nile tilapia (Oreochromis niloticus, L.) fry reared in aquaria. Journal of FisheriesSciences. com, 8(3), 228-237.
Ortuno, J., Esteban, A., & Meseguer, J. (2001). Effects of short-term crewding stress on the gilthead sea bream (Sparus aurata) innate immune response. Fish Shellfish Immunology, 11(1), 187-197.
Placinta, S., Cristea, V., Tiberiu, C., & Petrea, S. (2014). Hematological profile of juvenile European catfish (Silurus glanis) reared under different stocking densities in recirculating system conditions. Animal Science and Biotechnologies, 47(1), 239-245.
Placinta, S., Ion, S., Cristea, V., Grecu, I., Mocanu, M., Coada, A., Antache, A., Bocioc, E., & Petrea, M. (2011).The influence of stocking density on Silurus glanis (Linnaeus, 1758) growth performance in a recirculation aquaculture system. University of Agricultural Sciences and Veterinary Medicine Iasi. Scientific papers - Animal Husbandry Series, 58(1), 306-310.
Procarione, L. S., Barry, T. P., & Malison, J. A. (1999). Effects of high rearing densities and loading rates on the growth and stress responses of juvenile rainbow trout. North American Journal of Aquaculture, 61(2), 91-96.
Rоnyai, A., & Rottkay, A. (1990). Growth and food utilization of wells fry (Silurus glanis L.) fed with Tubifex worms. Aquacultura Hungarica, 6(1), 193-202.
Szlaminska, M. (1986). Rearing of catfish in water with elevated temperatures. Komis Rybak, 6(1), 13 (Pl).
Ulikowski, D., & Borkowska, I. (1999).The effect of initial stocking density on growth of European catfish (Silurus glanis L.) larvae under controlled conditions. Archives of Polish Fisheries, 7(1), 151-160.
Ulikowski, D., Borkowska, I., & Chybowski, L. (1998). Use of frozen zooplankton in the intense rearing of European catfish (Silurus glanis L.) larvae. Archives of Polish Fisheries, 6 (1), 97-106.
Usov, M. (2011). Improving the semi-intensive method for the rearing of European catfish. Current Problems of the Intensive Development of Animal Husbandry, 14(1), 322-329 (Ru).
Wioeniewolski, W. (1989). Breeding opportunities for catfish in ponds. Annals of Agricultural Sciences, 102(1), 138-166 (De).
Wolnicki J., & Myszkowski, L. (1998). Survival, growth and food conversion in European wels, Silurus glanis L., larvae fed commercially dry diets at 28˚C. Polish Archives of Hydrobiology, 4(1), 531-538.
Wolnicki, J., & Starzonek, I. (1996). Possibilities of using trout feeds and artemia cysts in the controlled rearing of catfish, Silurus glanis L. Komis Rybak, 1(1), 21-24 (Pl).
Zaikov, A. (2006). Aquaculture, principles and technologies. Kabri, Plovdiv, 1-314 (Bg).
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