Phorbol ester-induced metamorphosis in the parasitic barnacle, Loxothylacus panopaei

摘要

In order to in duce metamorphosis in cyprids of the parasitc barnacle Loxothylacus panopaei (Gissler) (Cirripedia: Rhizocephala: Kentrogonida), we tested a number of com- pounds (ZR-512, 20-hydroxyecdysone, 3-isobutyl-1-methylxanthine and pohorbol-12, 13-dibutyrate) all known to cause metamorphosis in thoracican barnacles. Only one agent, phorbol-12, 13-dibutyrate, had an effect and induced cypris larvae to complete metamor- phosis without previous attachment.