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Aquaculture, particularly marine‐based production, is one of the fastest growing industries in Indonesia. Indonesia's competitiveness in the trade of aquaculture products is constrained by a lack of research and development (R&D) of new aquaculture species candidates. Mariculture has the greatest potential due to Indonesia's vast marine resources and archipelagic geography. Although there are over 3,000 species of marine fish in Indonesia, only 14 species have been widely cultured, largely finfish. Production is dominated by shrimp, groupers and milkfish. Traditionally, candidate species for mariculture in Indonesia and elsewhere have often been selected on their market value before their biological suitability for culture has been established leading to partially successful R&D efforts or even failure. The present study developed a framework for selecting marine fish species to support mariculture R&D in Indonesia based on an improved analytic hierarchy process (AHP). The approach combined various quantitative and qualitative data and involved different R&D stakeholder groups in the selection process. Ten species that had not been previously researched for their aquaculture potential were identified. The modified approach addressed the interaction complexity of criteria and different preferences across the stakeholders. The involvement of different stakeholders in the selection process not only ensured acceptance of the selected species for further research, but also tested the validity and consistency of the method used in this study. The methodology has relevance for mariculture globally given that efficient candidate selection can help focus efforts and investment in mariculture R&D.

The study of Pb, Cd, Cu, Hg, and As and Fe in ABSTRAKPenelitian Pb, Cd, Cu, As, Hg dan Fe di perairan Pulau Natuna, Kepulauan Riau telah dilakukan. Pengambilan sampel air dan sedimen dilakukan. Sampel air dan sedimen diambil pada 35 stasiun pengamatan dengan metode purposive sampling pada Bulan November 2012. Analisa logam berat dan logam Fe permukaan dan sedimen menggunakan Spektofotometer Serapan Atom tipe nyala (FAAS). Hasil penelitian menunjukkan kadar logam berat Pb, Cd, Cu, Hg, dan As permukaan perairan Natuna sangat kecil, dibawah deteksi analisa dan memenuhi baku mutu yang ditetapkan oleh Kementerian Lingkungan Hidup Indonesia. Limit deteksi alat AAS untuk logam tersebut adalah 2µg/L untuk logam Pb, Cd, Cu, dan 0,02 µg/L utnuk Hg dan As. Konsentrasi Fe permukaan berkisar 0,021-0,054 mg/L. Kandungan logam berat Pb dan Cu dalam sedimen berturut-turut adalah 0,05-22,67 mg/kg dan 3,77-11,00 mg/kg dimana konsentrasi tertinggi dijumpai pada daerah sekitar Muara Binjai. Namun kondisi logam tersebut masih berada dibawah baku mutu CCME (2002) I. PENDAHULUANLaut Natuna memiliki sumber daya minyak dan gas alam yang berpeluang menyebabkan pencemaran akibat proses eksplorasi, transportasi ataupun