Abstract:
Three species of diatom: Chaetoceros calcitrans, Tetrasellmis chull, Isochrysis galbana, two species of blue green algae: BG1, BG2 and four species of zooplankton: mysid, artemia with HUFA, artemia larvae and copepod were analysed for nutrient composition. C. calcitrans were found having the highest crude protein 25.26 percent.
Protein composition in T. chuii and I. galbana 24.92 and 2.53 percent while fatty acid composition in BG1 and BG2 were 0.99 and 0.77 percent respectively. In zooplankton, mysid was found to have highest the protein composition, 30.87 percent. In other zooplankton, adult artemia mixed with cod liver oil, artemia larvae and copepod protein composition were 26.16, 22.69 and 5.24 percent respectively.
The growth rate in green mussels (Perna viridis L.) two-month fed with Thallassiosira sp., C. calcitrans and Lithodesmium sp. were found significantly discrimination of (P<0.05). And the three-gram artemia fed the three species of algae, T chuii, C. calcitrans and BG1 could increase weight up to 48.4+-0.53, 10.1+-0.12 and 0.4+-0.01 grams, respectively. While the average number in 9 d culture of ten copepods, Apocyclops sp. fed with I. galbana, C. calcitrans, C. sp. and T. chuii were 4255, 977, 877 and 833 individuals/I. And the suitable temperature to preserve Apocyclops sp. was 20 ' C, the survival rate within 10 days 83.25 percent