THE IMPACT OF THE MINERAL ZEOLITE ON FEED CONVERSION AND MORTALITY RATE ON COMMERCIALLY GROWN RAINBOW TROUT
Bodan Gjorgovski
Institute of Animal and Fishery Science, Ss. Cyril and Methodius University in Skopje, Blvd. Ilinden 92a, 1000 Skopje, North Macedonia
b_1988_gjorgovski@hotmail.com
Rodne Nastova
Institute of Animal and Fishery Science, Ss. Cyril and Methodius University in Skopje, Blvd. Ilinden 92a, 1000 Skopje, North Macedonia
Aleksandar Cvetković
Faculty of Veterinary Medicine, Ss. Cyril and Methodius University in Skopje, St. Lazar Pop-Trajkov 5-7, 1000 Skopje, North Macedonia
The aim of this study was to evaluate the effect of zeolite, added to feed, on feed conversion and mortality rate in commercially farmed rainbow trout. The research was conducted at the Riboexport DOOEL pond in Gostivar, at the Vrutok source. Three pools were included in the study: group A – without zeolite, group B – feed with 1 % zeolite, and group C – feed with 2 % zeolite. The fish were reared under standardized conditions (length 4 m, width 1 m, depth 45 cm, total water volume 1.8 m³, temperature 11 °C, and oxygen concentration 9–11 mg/l). Each pool contained 200 juvenile rainbow trout with an initial weight of 46–48 g and length of 15–16 cm, monitored over a 12-week period. Measurements were taken 8 times, at 14-day intervals. Feed conversion was determined using the Feed Conversion Ratio (FCR), and mortality was recorded numerically. The results are presented using descriptive statistics, showing FCR values of 0.89 for group A, 0.84 for group B, and 0.89 for group C. No mortality was recorded in groups A and B (0 %), while 3 dead fish (1.5 %) were observed in group C. The best feed conversion was observed in the group receiving feed with 1 % zeolite. Fish mortality was not related to zeolite application but was attributed to mechanical injuries during manual handling.
Keywords: aquaculture; growth performance; rainbow trout; zeolite; water quality
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Language:
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English and Macedonian
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Pages:
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11–15
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Number of references:
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30
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References:
[1] Ali, Y., Felafel, M., Hussian, A. E. (2025): Effect of zeolite on aquaculture water quality, fish and microalgae growth. Egyptian Journal of Aquatic Biology and Fisheries, 29 (1), 217–241, DOI: 10.21608/ejabf.2025.404119
[2] Alp, E. (2005): Transalcilasion and disproportion of aromatic compounds on zeolite catalyzators. MSc thesis, Ankara University.
[3] Aybal, N. O. (2001): Use of the different ration clinoptilolite as a feed additive in the rainbow trout’s (Oncorhynchus mykiss Walbaum, 1792) feeds. MSc thesis. Süleyman Demirel University, Isparta, Turkey.
[4] Brumovska, V., Postulkova, E., Sorf, M., Mares, J. (2018): Effect of the addition of zeolite to the rainbow trout diet, MendelNet, Vol. 25, pp. 155–159.
[5] Danbas, D., Altun, T. (2011): Effects of zeolite (Clinoptilolite) on some water and growth parameters of rainbow trout. Digest Journal of Nanomaterials and Biostructures, Vol 8, No 3, pp. 1111–1116.
[6] Dias, J., Huelvan, C., Dinis, M. T., Metailler, R. (1998): Influence of dietary bulk agents (silica, cellulose and a natural zeolite) on protein digestibility, growth, feed intake and feed transit time in European seabass (Dicentrarchus labrax) juveniles, Aquatic Living Resource, Vol. 11, No 4, pp. 219–226. https://doi.org/10.1016/S0990-7440(98)89004-9
[7] Ghada, R., Sallam, G. R., Aly, H. A., Lotfy, A. M., Abdel-Rahim, M. M., Fayed, W. M., Teiba, I., Mzengereza, K., Tembo, M., Singini, W., Habib, Y. J., Shehata, A. I. (2024): Natural zeolite for heavy metal, ammonia removal, and physiological responses in European sea bass (Dicen-trarchus labrax) juveniles tanks with different densities, PloS ONE, 19 (4), pp. 1–19. https://doi.org/10.1371/journal.pone.0297844
[8] Ghiasi, F., Jasour, M. (2012): The effects of natural zeolite (Clinoptilolite) on water quality, growth performance and nutritional parameters of freshwater aquarium fish, angel (Pterophyllum scalare). International Journal of Research in Fisheries and Aquaculture, 2 (3), pp. 22–25.
[9] Grazina, Z., Alvydas, Ž. (2024): The use of zeolite for water quality management in cold water recirculation aquaculture systems, Rural Development 2019, Vol. 2019 (1), pp. 364–370. DOI:10.15544/RD.2019.018
[10] Habera, W. J., Strange, J. R., Carter, D. B., Moore, E. S. (1996): Short-term mortality and injury of rainbow trout caused by three-pass AC electrofishing in a southern Appalachian stream, North American Journal of Fisheries Management, Vol. 16, Iss. 1, pp. 192–200. https://doi.org/10.1577/1548-8675(1996)016<0192:STMAIO>2.3.CO;2
[21] Kajbaf, K., Overturf, K., Kumar, V. (2024): Integrated alternative approaches to select feed-efficient rainbow trout families to enhance the plant protein utilization, Vol 14, Article 3869.
[22] Kanyılmaz, M., Tekelioğlu, N., Sevgili, H., Uysal, R., Aksoy, A. (2010): Influence of dietary natural zeolite (Clinoptilolite) on growth, body composition, some blood parameters and gut morphology in common carp (Cyprinus carpio L.), pp. 1758.
[23] Kause, A., Nousiainen, A., Koskinen, H. (2022): Improvement in feed efficiency and reduction in nutrient loading from rainbow trout farms: the role of selective breeding. Journal of Animal Science, Volume 100, Issue 8, skac 214. https://doi.org/10.1093/jas/skac214
[24] Mordhorst, C. A. (2022): Factors Influencing Mortality of Stocked Rainbow Trout in Black Hills Reservoirs, Electronic theses and dissertations. 452.https://openprairie.sdstate.edu/etd2/452.
[25] Mumpton, F. A. (1999): La roca magica: uses of natural zeolites in agriculture and industry. Proc Natl Acad Sci U S A, 96 (7), pp. 3463–3470. DOI: 10.1073/pnas.96.7.3463
[26] Öz, M., Şahin, D., Aral, O. (2016): The effect of zeolite Clinoptilolite as a feed additive and filter material for freshwater aquariums, Hacettepe Journal of Biology and Chemistry 2 (44), 203–203, DOI:10.15671/HJBC.20164418130
[27] Oz, M. (2023): The effect of zeolite (Clinoptilolite) as a feed additive and filter material for freshwater aquariums, Journal of Agricultural Production, 4 (1), 39–46. https://doi.org/10.56430/japro.1255407
[28] Roberts, R. J., Shepherd, C. (2001): Handbook of Trout and Salmon Diseases. Academy-UGURER Publication, Kayseri.
[29] Sidoruk, M., Cymes, I. (2018): Effect of water management technology used in trout culture on water quality in fish ponds, Water, Vol. 10 (9), 1264. https://doi.org/10.3390/w10091264
[30] Vandepute, M., Clota, F., Corraze, G., Terrier, F., Horat, M., Haffray, P., Skiba-Cassy, S., Enez, F., Larroquet, L., Petit, V., Dupont-Nivet, M. (2022): Realised genetic gains on growth, survival, feed conversion ratio and quality traits after ten generations of multi-trait selection in rainbow trout Oncorhynchus mykiss, fed a standard diet or a “future” fish-free and soy-free diet, Vol. 27, Art No 101363.
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