title: Biomass, lipid and fatty acid production in large-scale cultures of the marine macroalga Derbesia tenuissima (Chlorophyta).
abstract: Biomass productivity was quantified for the marine macroalga Derbesia tenuissima cultivated outdoors at seven stocking densities from 0.25 to 8 g L(-1) for 5 weeks. Total lipids and fatty acid quantity and quality was measured from samples that were freeze-dried, dried by oven (75 °C), food dehydrator (60 °C), or outdoor in the sun (40 °C) or shade (38 °C). Stocking densities of 0.25 to 2 g L(-1) yielded the highest biomass productivities (>20 g dry weight m(-2) day(-1)) with no effect on total lipid quantity (11 %), or fatty acid quantity (5.3 %) or quality at any density tested. However, there was an interactive effect of stocking density and drying technique, with a decrease of up to 40 % in polyunsaturated fatty acids in sun-dried compared to freeze-dried biomass. Notably, while fatty acid and biomass productivity may be inseparable in macroalgae, cultivation conditions have a significant carryover effect in the post-harvest delivery of high-quality bio-oils.
authors: MACRO - the Centre for Macroalgal Resources and Biotechnology, and School of Marine & Tropical Biology, James Cook University, Townsville, Queensland, 4811, Australia, marie.magnusson@jcu.edu.au.
authors: Marie
authors: M
authors: Magnusson
authors: Leonardo
authors: L
authors: Mata
authors: Rocky
authors: R
authors: de Nys
authors: Nicholas A
authors: NA
authors: Paul
mesh_terms: D061249:Batch Cell Culture Techniques / Q000379:methods*; D056804:Biofuels / Q000382:microbiology*; D019149:Bioreactors / Q000382:microbiology*; D049109:Cell Proliferation / Q000502:physiology; D000460:Chlorophyta / Q000166:cytology / Q000502:physiology; D005227:Fatty Acids / Q000378:metabolism*; D050356:Lipid Metabolism / Q000502:physiology*; D012624:Seaweed / Q000166:cytology / Q000502:physiology*
chemical_list: D056804:Biofuels; D005227:Fatty Acids