Cumulative particle count heat maps for 2014 and 2015 datasets (ENSO years).

Final (day 60) particle counts are shown for spawning seasons 1 (A) and 2 (B) for 2014, and seasons 1 (C) and 2 (D) for 2015. Black circles denote the positions of spat collector deployments described by Kishore et al. [22]. The colour legend indicates the cumulative particle visit count within individual 10Km² grid cells. Numbers denote the following localities: Viti Levu (1), Vanua Levu (2), Kadavu (3), Yasawa archipelago (4), Lau archipelago (5) and the Kingdom of Tonga (6).