Fig. 2.

Association between environmental heat stress (WBGT) and seed cutter productivity, stratified by sex, accounting for age, month, acclimatization and harvest. The x-axis display modeled estimates in an 18–30 year old seed cutter, in the baseline year (January, 2017–2018), having worked more than 14 days (thus acclimatized). The solid black dots [●] and lines describe the heat-productivity association on a Monday, i.e. after a rest day, and the crosses [X] and horizontal dash lines describe the heat-work association on a day preceded by a non-Monday in the same WBGT category, i.e. the accumulated effect of 2 days of equal heat exposure.