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Mariculture for bacterial and organic waste removal: a field study of sponge filtering activity in experimental farming

Ledda, Fabio D. and Pronzato, Roberto and Manconi, Renata (2014) Mariculture for bacterial and organic waste removal: a field study of sponge filtering activity in experimental farming. Aquaculture Research, Vol. 45 (8), p. 1389-1401. eISSN 1365-2109. Article.

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DOI: 10.1111/are.12084

Abstract

Culture experiments in the field were performed on western Mediterranean populations of Ircinia variabilis and Agelas oroides. To evaluate culture and filtering performances among polluted and unpolluted sites in shallow waters, farming experiments were carried out in a harbour, a small tourist nautical base and a pristine biotope. Sponge explants were cultured onto nylon ropes, and in situ clearance rate tests were performed on farmed sponges to assess filtering ability under diverse farming conditions. At the harbour site, sponge survival and growth were similar to that observed in the two unpolluted sites until early summer, when a rapid increase in explant mortality occurred in response to extreme variations in environmental conditions. Filtering experiments revealed high retention and clearance rates of I. variabilis and A. oroides at all sites. The highest rates were observed at the polluted site, reflecting the optimal metabolic performance of explants in the first phase of culture under stressful conditions. Our results highlight the feasibility of sponge microcosms and the ability of I. variabilis and A. oroides to clear large volumes of water of organic and bacterial loads in polluted sites.

Item Type:Article
ID Code:8551
Status:Published
Refereed:Yes
Uncontrolled Keywords:Biofilters, bioremediation, sponge culture, Ircinia variabilis, Agelas oroides
Subjects:Area 05 - Scienze biologiche > BIO/05 Zoologia
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Scienze della Natura e del Territorio
Publisher:Wiley
eISSN:1365-2109
Deposited On:25 Jan 2013 12:34

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