Fig. 5. Calanus helgolandicus embryos produced by females fed for 8 days with liposomes encapsulating decadienal at a concentration of 3.6 ng ml^–1 (LipoDD Cal; A) and blank liposomes at a lipid concentration of 6.3 µg ml^–1 lipid (Lipo Cal; B) and supplied with Prorocentrum minimum at a concentration of 8000 cells ml^–1. Embryos were stained with the vital fluorescent probe Annexin V-FITC. Green fluorescence indicates that nuclei were apoptotic (asterisks). Magnification: x200.