Potential of metal contamination to affect the food safety of seaweed (Caulerpa spp.) cultured in coastal ponds in Sulawesi, Indonesia

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aquaculture-reports-2016This study evaluated metal concentrations in Caulerpa spp. cultured in ‘traditional’ coastal ponds in South Sulawesi and consumed locally as food. Although Caulerpa spp. are a rich source of supplemental dietarynutrients, like many macroalgal species they are also capable of bioaccumulating potentially toxic metals.We measured the metal concentrations of Caulerpa spp. from several locations in South Sulawesi todetermine (1) whether cultivated Caulerpa spp. posed a potential risk to consumers, (2) whether Caulerpa spp. from cultivated ponds had different metal content that varied between localities and (3) whetherthere was any evidence for increased concentrations of heavy metals in Caulerpa spp. cultivated in pondswith known acid sulfate soils (ASS). Of the metals studied only As (0.7 mg kg−1) and Pb (0.35 mg kg−1)were recorded at concentrations approaching the national food safety (BSN) limits of Indonesia (1.0 and0.5 mg kg−1respectively). Locality differences were observed between samples that could be explained bythe background geography of sites. There was some indication that ASS conditions could lead to elevatedlevels of heavy metals. Consequently, we propose that the potential acidity of pond soil is consideredwhen cultivating Caulerpa.

Peneliti: Shane E. Perryman(a), Imran Lapong(b), Akhmad Mustafa(c), Rosiana Sabang(c),Michael A. Rimmer(b),(d),

(a) Makassar Independent School, Makassar, South Sulawesi, Indonesia

(b) ACIAR Field Support Office, Makassar, South Sulawesi, Indonesia

(c) Research Institute for Coastal Aquaculture, Maros, South Sulawesi, Indonesia

(d) University of Sydney, Faculty of Veterinary Science, Camden, New South Wales, Australia

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