Sustainable development of fresh water (FW) aquaculture requires minimal environmental impact, by reducing the waste discharged into the surrounding waters. To assess the water quality status and impact of flow-through trout farming in the Louros river (NW Greece), a seasonal evaluation of the trout production in the river was performed. Seasonal samples of river water entering and discharged were obtained to monitor some water quality parameters. The parameters were temperature, pH, ammonium, phosphate, dissolved oxygen (DO), biochemical oxygen demand (BOD5), electrical conductivity (EC), total dissolved solids (TDS), total nitrogen (TN), and total phosphorus (TP) of flow-through trout farms alongside the river. All monitored parameters indicated minimal environmental impact of the fish farms; pH ranged from 7.57 to 8.03, TDS ranged from 151.43 to 242.56 mg/L, DO ranged from 6.28 to 9.16 mg O2/L, BOD ranged from 0 to 2 mg O2/L. As for the nutrients, mean values were below each limit set for freshwater systems. NH4-N ranged from 0 to 0.28 mg/L, and PO4-P ranged from 0.15 to 0.42 mg/L. Based on the comparison of water quality parameters in the outlets and on the Environmental Impacts and Environmental Quality Standards (EQS), it can be concluded that trout fish farms had no significant environmental impact on the river water quality during any of the tested seasons. All parameters presented strong increasing trends during spring and summer and low decreasing trends in autumn and winter. In conclusion, the results indicated minimal aquaculture impact on river Louros water quality.
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Ackerman, D., & Weisberg, S. B. (2003). Relationship between rainfall and beach bacterial concentrations on Santa Monica bays. Journal of Water and Health, 1, 85–89.
Allan, J. D., & Castillo, M. M. (2007). Stream ecology: Structure and function of running waters. Springer.
Asir, U., & Pulatsü, S. (2008). Estimation of the nitrogen-phosphorus load caused by rainbow trout (Oncorhynchus mykiss Walbaum, 1792) Cage-Culture Farms in Kesikkopru Dam Lake: A Comparison of Pelleted and Extruded Feed. Turkish Journal of Veterinary and Animal Sciences., 32, 417–422.
Bergheim, A., & Brinker, A. (2003). Effluent treatment for flow through systems and European environmental regulations. Aquaculture Engineer, 27, 61–77.
Beveridge, M. C. (2004). Cage aquaculture (3rd ed., p. 234). Fishing News Books.
Black, K. D. (2001). Environmental impacts of aquaculture. Sheffield Biological Sciences, 6 Sheffield. Sheffield: Academic Press.
Boaventura, R., Pedro, A. M., Coimbra, J., & Lencastre, E. (1997). Trout farm effluents: Characterization and impact on the receiving streams. Environmental Pollution, 95(3), 379–387.
Bunting, S. W. (2012). Principles of sustainable aquaculture: Promoting social, economic and environmental resilience (1st ed.). Routledge. https://doi.org/10.4324/9780203127438
Chapman, D. (Ed.) (1996). Water quality assessments: a guide to the use of biota, sediments and water in environmental monitoring. (2nd ed). World Health Organization, UNESCO & United Nations Environment Programme. London: E & FN Spon. https://apps.who.int/iris/handle/10665/41850
Coldebella, A., Godoy, A. C., Gentelini, A. L., Piana, P. A., Coldebella, P. F., Boscolo, W. R., & Feiden, A. (2020). Nitrogen and phosphorus dynamics in Nile tilapia farming in excavated rearing ponds. Research, Society and Development, 9(11), e1319119699.
Commission, O. S. P. A. R. (2000). HARP-NUT Guideline 2: Quantification and Reporting of Nitrogen and Phosphorus Discharges/Losses from Aquaculture Plants. OSPAR Agreement.
Cromey, C. J., Black, K. D., Edwards, A., & Jack, I. A. (1998). Modelling the deposition and biological effects of organic carbon from marine sewage discharges. Estuarine. Coastal and Shelf Science., 47(3), 295–308.
Department of Fisheries and Oceans Canada, Canadian Science Advisory Secretariat. (2015). Freshwater cage aquaculture: ecosystems impacts from dissolved and particulate waste phosphorus. DFO Can. Sci. Advis. Sec. Sci. Advis. Rep. 2015/051.
Environmental Protection Agency of United States. (2000). Nutrient criteria technical guidance manual: rivers and streams. 2000, July, 1–253. EPA-822-B-00-002, Office of water, Office of Science and Technology, Washington DC 20460.
Federation of Greek Maricultures. (2017). The Greek Aquaculture Annual Report for 2017. www.fgm.com.gr. Accessed Nov 2019.
Food and Agriculture Organization of the United Nations. (2020). FAO Fisheries and Aquaculture Department for the aquaculture sector in Greece http://www.fao.org/fishery/countrysector/naso_greece/en. Accessed 2021.
Henriksson, P. J., Rico, A., Zhang, W., Ahmad-Al-Nahid, S., Newton, R., Phan, L. T., Zhang, Z., Jaithiang, J., et al. (2015). Comparison of Asian aquaculture products by use of statistically supported life cycle assessment. Environmental Science & Technology, 49(24), 14176–14183.
Karakassis, I., Pitta, P., & Krom, M. D. (2005). Contribution of fish farming to the nutrient loading of the Mediterranean. Scientia Marina Barcelona, 69, 313–321.
Klaoudatos, S. D. (2001). Environmental impact of aquaculture in Greece. Practical experiences. National Centre for Marine Research, Aghios Kosmas, 16604 Athens, Greece. 2001.
Koçer, M., Kanyılmaz, M., Adil, Y., & Sevgili, H. (2013). Waste loading into a regulated stream from land-based trout farms. Aquaculture Environment Interactions., 3, 187. https://doi.org/10.3354/aei00059
Konstantinidis, E., Perdikaris, C., Gouva, E., Nathanalides, C., Bartzanas, T., Anestis, V., & Skoufos, I. (2020). Assessing Environmental Impacts of Sea Bass Cage Farms in Greece and Albania Using Life Cycle Assessment. International Journal of Environmental Research., 14, 693–704.
Lazzari, R., & Baldisserotto, B. (2008). Nitrogen and phosphorus waste in fish farming. Boletim Do Instituto De Pesca, 34, 591–600.
Mavraganis, T., Choremi, C., Kolygas, M., Vidalis, K., & Nathanailides, C. (2020). Environmental issues of aquaculture development. Egyptian Journal of Aquatic Biology and Fisheries., 24(2), 441–450.
Mavraganis, T., Thorarensen, H., Tsoumani, M., & Nathanailides, C. (2017). On the environmental impact of freshwater fish farms in Greece and in Iceland. Annual Research and Review in Biology., 13(1), 1–7.
Miao, S., Jian, S., Liu, Y., Li, C., Guan, H., Li, K., Wang, G., & Wang, Z. (2020). Long-term and longitudinal nutrient stoichiometry changes in oligotrophic cascade reservoirs with trout cage aquaculture. Scientific Reports., 10(1), 1–10.
Moraes, M. A. B., Carmo, C. F., Tabata, Y. A., Vazdos Santos, A. M., & Mercante, C. T. J. (2016). Environmental indicators in effluent assessment of rainbow trout (Oncorhynchus mykiss) reared in raceway system through phosphorus and nitrogen. Brazilian Journal of Biology., 76(4), 1021–1028.
Mpeza, P., Mavraganis, T., & Nathanailides, C. (2013). Dispersal and variability of chemical and biological indices of aquaculture pollution in Igoumenitsa Bay. Annual Review and Research in Biology., 3(4), 873–880.
Osti, J. A. S., Moraes, M. A. B., Carmo, C. F., & Mercante, C. T. J. (2017). Nitrogen and phosphorus flux from the production of Nile tilapia through the application of environmental indicators. Brazilian Journal of Biology., 78(1), 25–31.
Pejman, A. H., NabiBidhendi, G. R., Karbassi, A. R., Mehrdadi, N., & EsmaeliBidhendi, M. (2009). Evaluation of spatial and seasonal variations in surface water quality using multivariate statistical techniques. International Journal of Environmental Science Technology., 6(3), 467–476.
Pillay, T. V. R. (2004). Aquaculture and the environment (2nd ed.). Blackwell and Publisher.
Rosenthal, H. (1994). Fish farm effluents and their control in EC countries: Summary of a workshop. Journal of Applied Ichthyology., 10(4), 215–224.
Tahar, A., Kennedy, A. M., Fitzgerald, R. D., Clifford, E., & Rowan, N. (2018). Longitudinal evaluation of the impact of traditional rainbow trout farming on receiving water quality in Ireland. PeerJ, 6, e5281. https://doi.org/10.7717/peerj.5281
Tavakol, M., Shayeghi, M., Monavari, S. M., & Karbasi, A. (2020). Assessment of Pollution from Trout Farms (Case Study: Haraz River). Journal of Environmental Science and Technology, 22(5), 327–348.
Telfer, T. C., Beveridge, M. C. M. (2001). Monitoring environmental effects of marine fish aquaculture. In: Uriarte A. (ed.), Basurco B. (ed.). Environmental impact assessment of Mediterranean aquaculture farms. Zaragoza: CIHEAM, 2001. p. 75–83. (Cahiers Options Méditerranéennes; n. 55). TECAM Seminar on Environmental Impact Assessment of Mediterranean Aquaculture Farms, 2000/01/17–21, Zaragoza (Spain). http://om.ciheam.org/om/pdf/c55/01600222.pdf
Timmons, M. B., Ebeling, J. M., Wheaton, F. W., Summerfelt, S. T., Vinci, B. J. (2002). Recirculating Aquaculture Systems, 2nd edition. Northeastern Regional Aquaculture Center. Publication No. 01-002. Cayuga Aqua Ventures. Ithaca, NY.
Turner, K., Lenzen, M., Wiedmann, T., & Barrett, J. (2007). A technical note on combining input-output Examining the Global Environmental Impact of Regional Consumption Activities. Ecological Economics., 62(1), 37–44.
Varol, M. (2020). Use of water quality index and multivariate statistical methods for the evaluation of water quality of a stream affected by multiple stressors: A case study. Environmental Pollution, 266, 1154–1217.
Varol, M., & Balci, M. (2020). Characteristics of effluents from trout farms and their impact on water quality and benthic algal assemblages of the receiving stream. Environmental Pollution, 266, 115101.
Wallace, J. (1993). Environmental considerations in Salmon aquaculture (pp. 127–144). Fishing News.
White, P. (2013). Environmental consequences of poor feed quality and feed management. In M.R. Hasan and M.B. New, eds. On-farm feeding and feed management in aquaculture. FAO Fisheries and Aquaculture Technical Paper No. 583. Rome, FAO. pp. 553–564.
Yeo, S. E., Binkowski, F. P., Morris, J. E. (2004). Aquaculture effluents and waste by-products characteristics, potential recovery and beneficial reuse. NCRAC Technical Bulletins 6. 45pp. Avaliable at http://lib.dr.iastate.edu/ncrac_techbulletins/6. Accessed 18 Feb 2020
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Mavraganis, T., Tsoumani, M., Kolygas, M. et al. Using seasonal variability of water quality parameters to assess the risk of aquatic pollution from rainbow trout fish farms in Greece. Int J Energ Water Res (2021). https://doi.org/10.1007/s42108-021-00141-5
- Freshwater aquaculture
- Water quality
- Environmental impact
- Rainbow trout