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Water 2016, 8(10), 423; doi:10.3390/w8100423

Evaluation of Dicentrarchus labrax Meats and the Vegetable Quality of Beta vulgaris var. cicla Farmed in Freshwater and Saltwater Aquaponic Systems

1
Department of Life and Environmental Science, Università Politecnica delle Marche, via Brecce Bianche, Ancona 60131, Italy
2
Department of Agri-Food Production and Environmental Sciences, Animal Sciences Section, Università di Firenze, Via delle Cascine 5, Florence 50144, Italy
3
Aquaguide S.a.s. di Davide Di Crescenzo & C., Via IV Novembre 8, Falconara Marittima (AN) 60015, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: M. Haïssam Jijakli
Received: 10 August 2016 / Revised: 20 September 2016 / Accepted: 20 September 2016 / Published: 26 September 2016
(This article belongs to the Special Issue Aquaponics: Toward a Sustainable Water-Based Production System?)
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Abstract

The purpose of this study is to exploit the euryhaline nature of commercially attractive species for their cultivation in freshwater aquaponic systems. This approach may increase the profitability of aquaponic production in coastal countries where the consumption of marine fish is traditional and of commercial relevance. For this purpose, juvenile European sea bass (Dicentrarchus labrax) were reared in an aquaponic freshwater (AFW) system and an aquaponic saltwater (ASW) system (salinity 20 ppt), in combination with chard (Beta vulgaris var. cicla) seedlings, a salt tolerant plant. At the end of the trial, nitrate and phosphate concentration in water significantly increased in the ASW system, suggesting that the ability of B. vulgaris to absorb these substances was limited by salinity. Total reflection X-ray fluorescence spectrometry revealed that the concentration of some oligoelements such as Fe remained lower with respect to the concentration in the freshwater hydroponic solution, in both AFW and ASW. FTIR-Fourier transform infrared spectroscopy on plants showed that growth at high salinity affected their lipid content. In the case of fish, freshwater had no effects on mono- and poly-unsaturated fatty acid profiles, although saturated fatty acids were significantly decreased in D. labrax reared in AFW. Our results demonstrates that it is possible to increase aquaponic profitability by farming D. labrax juveniles in an aquaponic freshwater system together with Beta vulgaris, obtaining good quality products. View Full-Text
Keywords: aquaponics; marine aquaponic; saltwater; chard; fatty acid; European sea bass aquaponics; marine aquaponic; saltwater; chard; fatty acid; European sea bass
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Nozzi, V.; Parisi, G.; Di Crescenzo, D.; Giordano, M.; Carnevali, O. Evaluation of Dicentrarchus labrax Meats and the Vegetable Quality of Beta vulgaris var. cicla Farmed in Freshwater and Saltwater Aquaponic Systems. Water 2016, 8, 423.

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