Preprint volume - SIBM
Preprint volume - SIBM
Preprint volume - SIBM
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Pre-print Volume – Oral presentations<br />
Topic 3: INTEGRATED COASTAL ZONE MANAGEMENT<br />
E. CECERE, M. ACQUAVIVA, M. BELMONTE, F. BIANDOLINO, R.A. CAVALLO, R. LO NOCE,<br />
M. NARRACCI, A. PETROCELLI, P. RICCI, L. STABILI, G. ALABISO<br />
Istituto per l’Ambiente Marino Costiero (IAMC) – CNR, Via Roma, 3 – 74100 Taranto, Italia.<br />
ester.cecere@iamc.cnr.it<br />
SEAWEEDS AND AQUACULTURE: AN INDISPENSABLE ALLIANCE<br />
FOR THE INTEGRATED MANAGEMENT OF COASTAL ZONE<br />
LE MACROALGHE MARINE E L’ACQUACOLTURA: UN CONNUBIO<br />
STRATEGICO NELLA GESTIONE INTEGRATA DELLA FASCIA COSTIERA<br />
Abstract – Seaweed cultivation in aquaculture plant effluents can reduce the impact of farming activities on<br />
coastal waters so making aquaculture an eco-sustainable activity. In this respect, the capability of nitrogen<br />
uptake, the fatty acid composition and the antimicrobial activity of six seaweeds from the Apulian coasts<br />
were investigated. They proved to be good bioremediators as well as a suitable feed for reared species due<br />
to the presence of essential fatty acids and the antimicrobial activity of their lipidic extracts.<br />
Key-words: ammonium uptake, antimicrobial activity, bioremediation, fatty acids, seaweeds.<br />
Introduction – Marine macroalgae can be successfully used to reduce the impact of<br />
aquaculture activities on the coastal zone; indeed, due to their capability to uptake<br />
phosphorus and nitrogen salts, these last even as ammonium, seaweeds can strongly<br />
reduce these salts concentrations in the fish farm effluents, where they are usually very<br />
high (Hernández et al., 2002). These wastes, when discharged into coastal waters,<br />
cause their eutrophication and the consequent undesirable well known phenomena (e.g.<br />
algal blooms, ipoxia, etc.). Moreover, macroalgal biomass resulting from the<br />
bioremediation process could be used for the preparation of innovative feeds (Valente<br />
et al., 2006), drugs and fertilizers thus resulting in an added value. Therefore, seaweeds<br />
could increase and diversify the income of aquaculture farms, making aquaculture an<br />
eco-sustainable activity (Neori, 2009). Despite this, abroad seaweeds were usually<br />
cultivated to this aim at a pilot plant level and, only rarely, at industrial scale in<br />
aquaculture plants (Hernández et al., 2002). In Italy, the interest for this kind of<br />
research has always been scarce (Cecere, 2006) and is still scarce even though at the<br />
end of the ‘70s, some researchers realized the potential importance of seaweeds as<br />
bioremediators (Giaccone et al., 1979). In this paper, we present the ongoing studies in<br />
the frame of a large multidisciplinary project for the exploitation of the macroalgae<br />
present along the Apulian coasts. One of the aim of the project is to realize integrated<br />
polyculture farms in order to make aquaculture a friendly environmental activity in the<br />
view of the integrated management of coastal zone.<br />
Materials and methods – The following 6 species: Gracilaria dura (C. Agardh) J.<br />
Agardh, G. gracilis (Stackhouse) Steentoft, L.M. Irvine et Farnham and Gracilariopsis<br />
longissima (S.G. Gmelin) Steentoft, L.M. Irvine et Farnham (Gracilariales,<br />
Rhodophyta), Cystoseira barbata (Stackhouse) C. Agardh (Cystoseiraceae,<br />
Ochrophyta), Cladophora rupestris (Linnaeus) Kützing and Chaetomorpha linum (O.F.<br />
Müller) Kützing (Cladophorales, Chlorophyta) from the Apulian coasts were examined<br />
to detect the: 1) ammonium uptake capability both in N-limited and N-replete status in<br />
lab tests (for methods see Alabiso et al., 2007, 2008); 2) lipidic and fatty acids<br />
composition of both winter and summer thalli to test suitability for feed (for methods<br />
41 st S.I.B.M. CONGRESS Rapallo (GE), 7-11 June 2010<br />
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