"Does it take into account the additional co2 that fishing boats emit?"
Yes.
"Unlike previous studies that have largely overlooked the downstream processing activities associated with Alaskan pollock, this study examined all the components of the supply chain, from fishing through the retail display case." [https://news.ucsc.edu/2020/01/mckuin-fish.html]
Yes.
"Unlike previous studies that have largely overlooked the downstream processing activities associated with Alaskan pollock, this study examined all the components of the supply chain, from fishing through the retail display case." [https://news.ucsc.edu/2020/01/mckuin-fish.html]