Fig. 3From: Evolution, phylogenetic distribution and functional ecology of division of labour in trematodesRelative numbers of reproductive and soldier rediae in colonies of the trematode Philophthalmus sp. inside their snail host Zeacumantus subcarinatus. Each panel contrasts control colonies with those exposed to a different stressor: interspecific competition from Maritrema novaezealandense (a), ocean acidification (b) and a drilled snail shell allowing pathogen invasion (c). Numbers of colonies in each group are shown in parentheses. Data from [33, 43, 44]Back to article page