Agar Production by Macroalga Gracilariaopsis persica in the Coastal Waters of the Persian Gulf

摘要: Production of agar from marine macroalga Gracilaria, makes it important for local enterprise coastal communities. The aim this study is to gather basic technical data the development G. opsis persica mariculture in Persian Gulf Iran. Monoline and net methods were applied determine biomass productivity. Biological parameters chlorophyll, thallus length, position along thallus, color; environmental temperature, pH, salinity, TDS TSS measured during cultivation. changes NO2 - , NO3 PO4 3- SiO4 2- ions monitored daily. STATISTICA 10 Software was used statistical analyze data. experiments performed May through June 2010 Qeshm Island. Biomass values increased experiment period reached maximum 5890-g Fw m -1 (30 th day) 5300-g (36 monoline methods, respectively. Mean growth rate (GR) relative (RGR) mono 4.4-% d (4.0 ± 0.30) 4.3-% (3.0 0.25), Positive correlations found between (r = 0.59; p < 0.001) GR 0.61; 0.001). During period, temperature changed range 25.35 30.75°C (Mean: 28.03 1.23), pH 7.9 8.4 8.2 1.14), salinity 41.2 49.75 46.13 2.11) PSU. Extracted yield cultivation ranged 40.4 15-%. These results demonstrated great potential system its economic use production by