GREEN MUSSELS CULTURE (Perna viridis L.) IN THE MANGROVE AREA POTENTIALLY IMPACTED BY HEAVY METAL

suyono, Suyono and Shapawi, Rossita and Narto, Narto GREEN MUSSELS CULTURE (Perna viridis L.) IN THE MANGROVE AREA POTENTIALLY IMPACTED BY HEAVY METAL. Indonesian Journal Of Marine Sciences. ISSN 0853-7291

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Abstract

The purposes of this study are: 1) to investigate the types of different collectors and their most effective height of installation in the green mussels cultination (Perna viridie L.) impacted by heavy metal pollution in mangrove and non-mangrove waters; 2) to determine the content of heavy metals, especially Plumbum (Pb), Cuprum (Cu), Cadmium (Cd), and Hydragyrum (Hg) in green mussels cultivation. This research was conducted for 6 months from April to September 2018 in the coastal area of Karangdempel, Losari Sub District, Brebes Regency. The method used in this research was experimental. The results showed that: 1) the growth of green mussels after 6 months period of maintenance reached 7-9 cm long, weighing 10-13 grams per head and yielded 23-30 heads per collector. The most effective mussel collector was made from net sacks installed at a height of 30 cm from the bottom of the water. The number of green mussels per collector was more in mangrove location compared to those in the non-mangrove location, whi8their growth in length and weight were relatively the same in both locations; 2) in general, the heavy metal content in seawater and in the green mussel meat are still within the permissible limits of the Indonesian National Standard, except for the Cu content in the green mussel meat exceeding the allowable limit; but it was relatively still safe acconng to the Decree of the Director General of Drug Control and Food, Indonesian Ministry of Health, No. 03725 /B/SK/1989. Pb content in sediments in both location of green mussels cultivation and the Cisanggarung River basin is still within the safe limits. The content of Cd, Cu, and Hg in sediments tends to be high at the maximum permissible limit, even the Cu content m the Cisanggarung RiveOached twice the maximum allowable value. The heavy metal content in the research areas, both in mangrove and non-mangrove areas, was relatively not different as a result of mangrove reforestation dominated br seedlings and saplings with little influence on the quality of the water ecologically and economically.

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