TY - JOUR ID - 117035 TI - Effect of light and nitrogen concentration on the growth and lipid content of marine diatom, Chaetoceros calcitrans JO - Iranian Journal of Fisheries Sciences JA - IJFS LA - en SN - 1562-2916 AU - Akbarnejad, Mahsa AU - Rajabi Islami, Houman AU - Mehran Javaheri, Mehran Javaheri AU - Shamsaie Mehrgan, Mehdi AU - Filizadeh, Yousef AD - science and research branch, islamic azad university, tehran, iran AD - Department of Fisheries, Science and Research Branch, Islamic Azad University, P.O. Box:14515-775, Tehran, Iran. AD - AD - IAU Y1 - 2020 PY - 2020 VL - 19 IS - 2 SP - 986 EP - 993 KW - Keywords: Chaetoceros calcitrans KW - light KW - Nutrient levels KW - Experimental conditions DO - 10.22092/ijfs.2018.117035 N2 - Abstract The effects of light intensity (µ mol m-2 s-1) and different levels of Nitrogen was made on the biomass and lipid of microalgae Chaetoceros calcitrans under  laboratory conditions in the north of Iran in 2016. The pure strand of C. calcitrans with F/2 media (8 sets of 3 flasks) were placed in front of the light source at values of 80, 160, and 240 µ mol m-2 s-1. The cell count was collected in lasted 7 days. Every day cells were counted recorded. Maximum cell densities were approximately 279, 299, 395 and 402×106 cells ml−1in 25, 50, 75 and 100 % nutrient levels respectively, up to the 20th day of media enrichment, also maximum cell density was 98×106 cells ml−1 in 100% nutrient level and 240 µ mol m-2 s-1 up to the 20th day. Results showed that the lipid yield decreased significantly with increasing light levels. The total lipid was significantly higher (14.41%) in control compare with 25, 50, 75 and 100% nutrient levels. The total lipid at 80, 160, and 240 µ mol m-2 s-1 were 13.31, 12.09 and 10.17% respectively. The production and storage of lipids by microalgae in response to variations in environmental factors are specific for each microalgae species. UR - https://jifro.areeo.ac.ir/article_117035.html L1 - https://jifro.areeo.ac.ir/article_117035_2817b14b2367d51be31ccf2d3572fd45.pdf ER -