What is the fine-grained topic of the following text: We investigated how a key behavioural trait, predator avoidance behaviour (PAB; percentage of long defensive spines that moved in response to shadow stimuli), was affected by elevated SST in 180 individuals from 2 contrasting Honduran reefs: Utila (flattened reef structure, dearth of predation refugia) and Banco Capiro (complex reef structure, abundant refugia). Only return the topic.
The effect of elevated Sea Surface Temperature (SST) on predator avoidance behaviour in reef organisms from two contrasting Honduran reefs.