Figure 4.

(a) Thrust power (W) of right whales swimming at 1.23 m/s when not entangled (P _T,n) and when entangled in fishing gear (P _T,e), as well as the additional thrust power (P _T,a = P _T,e − P _T,n) required when entangled. Red dots represent whales that died from their entanglement; black represents cases that survived. (b and c) Additional work (W _a, J) required for entangled right whales over their minimum (b) and maximum (c) entanglement durations, separated for whales who survived their entanglements (white) and those who died (red). The dashed line in panel B indicates the 0.75 quantile “critical additional energy” threshold used to estimate survival