achieved soon, allocation choices should be clearly defined
and justified. Inventory results with regard to the allocation
method adopted should also be supported by thorough
sensitivity analysis, as advocated by ISO. Databases and
software should, moreover, simplify the application of
alternative allocation decisions to enable more extensive
sensitivity analyses.
All studies had adopted the IPCC recommendations for
global warming, as it represents a highly resourceful
centralized scientific body. Similar developments should
be encouraged for other impact categories, following
initiatives by ILCD and UNEP-SETAC. However, inventories
of the characterized environmental flows need to be made
available to allow alternative characterization factors to be
implemented. Toxicological implications should also be given
more attention as they have historical importance in the aquaculture
sector (e.g., Malachite green). New characterization
factors and standardized protocols need to be developed to
address more aquaculture-specific concerns (e.g., seafloor
disturbance and biotic resource use). A distinction between
terrestrial and aquatic eutrophication may also have to be
made, as these emissions usually have distinctly different
origins.