We conducted Internet searches to identify government
websites, reports, and peer-reviewed papers that document the
quantity of seafood and fraction lost at various steps of the seafood
supply chain and at the consumer level. We did not conduct a
systematic review of seafood loss, but instead used a type of chain
sampling approach where we explored the references listed in
prominent reports and peer-reviewed papers and followed those
reference to new references, and so on to identify pertinent
literature. Only English-language reports were considered, which
included data sources from other countries. Next, we cataloged all
data sources and discrete data elements in Excel (Microsoft). The
Supporting information (SI) document contains a detailed
description of each data element reviewed for this study. In
Table S1, we report all data elements used in the study, the units,
available date range, data collection methods, and text description.
We describe data limitations, and score data quality and
generalizability on a scale (low, medium, high) based on our
assessment. In Table S2, we describe all data reviewed but
ultimately not used, and the reasons for not using these sources.
Table S3 presents US National Marine Fisheries Service (NOAA,
2013a) raw data for annual aquaculture and
fisheries production
and trade and the US seafood supply by product form (fresh and
frozen, canned, cured). Tables S4 and S5 report the loss fractions
used in calculations and references for each loss fraction. After
reviewing the available data on seafood supply and loss we