@inproceedings{fdi:010093225,
  title = {{B}enefits of growing {U}lva in land-based partially recirculated {IMTA} systems},
  author = {{M}acey, {B}.{M}. and {B}rink-{H}ull, {M}. and de {V}os, {B}. and {C}heca, {D}.  and {S}ánchez, {I}. and {D}arias, {M}aria {J}. and {C}yrus, {M}.{D}. and {B}olton, {J}.{J}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}s part of the {A}ll-{A}tlantic {O}cean {S}ustainable, {P}rofitable and {R}esilient {A}quaculture ({ASTRAL}) project, we have investigated the benefits of growing the green seaweed {U}lva lacinulata in land-based, partially







recirculated aquaculture systems with either abalone, {H}aliotis midae or sea urchin, {T}ripneustes gratilla. {W}e demonstrated that integrated multitrophic aquaculture ({IMTA}) grown {U}lva is an excellent source of







minerals, vitamins, {AA}'s, {FA}'s, protein, complex polysaccharides, and other bioactive compounds. {W}hen used as a feed or a feed component, {U}lva enhanced the chemosensory properties of formulated feeds







and significantly improved feed consumption, reducing reliance on harvesting of natural seaweeds and dependence on the use of protein-rich formulated feeds. {T}he nutrient uptake efficiency of {U}lva was







shown to be ~60% in the abalone-{U}lva {IMTA} with 50% recirculation, and ~80% in the urchin-{U}lva {IMTA} with 90% recirculation. {W}hen recirculation rates were increased from 0-50% for the abalone and 0-90%







for the urchin {IMTA} systems, energy consumption was reduced from 10.35-6.80 k{W}h per ton abalone and 12.45-3.54 k{W}h per ton urchin biomass harvested. {A} perceived risk of growing {U}lva in abalone







effluent and utilizing it as a supplementary feed is biosecurity. {H}owever, our comprehensive microbiome studies have revealed high microbial diversity in all compartments of the {IMTA}, indicative of a healthy system,







and {U}lva exhibited a modulatory effect on the microbiome, reducing the abundance of opportunistic pathogens (e.g., {V}ibrio spp.). {C}ollectively, our studies revealed several benefits associated with the cultivation of {U}lva







in {IMTA} systems and high potential for {IMTA} to support sustainable aquaculture and a circular bioeconomy},
  keywords = {},
  numero = {},
  pages = {13},
  booktitle = {{A}quaculture {A}ssociation of {S}outhern {A}frica {C}onference [book of abstracts]},
  year = {2024},
  URL = {https://www.documentation.ird.fr/hor/fdi:010093225},
}