Fig. 3. (A) Unsettled cypris larvae and (B) a recently settled juvenile, as observed in the settlement assays. Scale bars, 0.5 mm. (C) Percentage of settled B. amphitrite larvae when exposed to B. amphitrite larval extract (equivalent to products from 1000 cyprids well^–1) and B. amphitrite adult extract (equivalent to products from 0.5 adults well^–1). Effect of varying concentrations of (D) hepoxilin A₃ and (E) PBT-3 on the percentage of larval settlement. Values represent arithmetic means + 1 S.E.M., for 10 day-0 cyprids after 48 h (N=3–19). Significant differences ^*P<0.05 from the methanol controls (open bars).

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