Thanks for your engagement with the report and this question! Our next report is now out, which addresses this to some extent. We found that mortality does decrease as farm intensity increases, but the data here is limited. I also did a quick BOTEC (numbers are rounded):
Details on data in the BOTEC:
Our first report found that 440 billion shrimp are slaughtered annually.
Proportion of production is reported by Boyd et al. (2022, p.33), who estimate that in 2018 it was 11.5% Extensive, 16.7% Semi-intensive, and 71.8% Intensive. They don’t report super-intensive, so we assume at the time it was <1%. But, because this source is ~6 years old and the industry has likely intensified since then, we put it at 1%, and reduce the other three farm types by 0.333…%.
Mortality rates from our new pre-slaughter mortality report (see Figure 6), I took the mean of the means reported for each farm type.
Hi Vasco,
This graph does include wild shrimp. I’ve made the change to the axes you suggested and updated the figure caption to note that wild shrimp are included. Thanks for your suggestions!