Life cycle assessment of seabass and meagre in marine cage farming: From feeding plant to harvesting
Published:
Feb 22, 2021
Keywords:
Life Cycle Assessment seabass meagre feed granulation aquaculture.
Abstract
Aquaculture is related to environmental impacts locally and globally. The purpose of this study was to identify environmental hotspots in fish feeds of various granulations in seabass and meagre farming, by using Life Cycle Assessment (LCA), given that recent studies suggested fish feed as the predominant factor affecting environmental impacts in marine fish farming. This, in turn enabled a detailed comparison of the environmental performance throughout the rearing cycle, in both species. LCA was applied on the production process of fish feeds taking into account the amount of raw materials, heat and energy needed for the production of feed. Similarly, LCA was applied in cage farms in Greece, involving the amount of feeds per size class, energy and fuel needed for the production of one tonne of seabass and meagre, respectively. The smaller size feed (SSF) class distributed to the fry, performed better compared to medium (MSF) and large size feed (LSF) classes provided to juveniles/adults, in relation to various environmental impact indicators. In medium and large size feeds, the main negative contributor was the use of sunflower meal, while small size feed affected these indicators through higher electricity demands and the inclusion of higher fishmeal level. The comparison between seabass and meagre revealed that meagre had significantly lower impact in all eighteen environmental impact indicators. This should be attributed to the reduced feed conversion ratio and the lower fry requirements compared to seabass. Improvements in cultivation methods of raw materials, optimized reductions in the inclusion of marine origin raw materials and improved feeding management could contribute to the overall ecological sustainability of the sector.
Article Details
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KONSTANTINIDIS, E., PERDIKARIS, C., & GANIAS, K. (2021). Life cycle assessment of seabass and meagre in marine cage farming: From feeding plant to harvesting. Mediterranean Marine Science, 22(1), 125–136. https://doi.org/10.12681/mms.25052
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- Vol. 22 No. 1 (2021)
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- Research Article
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