Figure 1. Mean (± s.e.) proportion of the number of damselfish per reef per fish size class for two species.

Lemon damselfish Pomacentrus moluccensis are from the Lagoon (a) and Casuarina Beach (b) sites and ambon damselfish P. amboinensis are from the Lagoon (c) and Casuarina Beach (d) sites on reefs with cleaner wrasse Labroides dimidiatus present (dark grey bars) and absent (light grey bars). Data were analysed as number of fish per size class (total length) per reef but are presented here as proportions for ease of comparison between cleaner fish treatments. Number of reefs sampled according to L. dimidiatus presence. P. moluccensis: Lagoon n = 6 present, n = 5 absent; Casuarina Beach n = 3 present, n = 2 absent. P. amboinensis: Two reefs with small sample sizes were omitted (see results for details). Lagoon n = 6 present, n = 4 absent; Casuarina Beach n = 2 present, n = 2 absent.