Induction of settlement of larvae of the sea urchin Holopneustes purpurascens by histamine from a host alga. From: The Biological Bulletin | Date: June 1, 2004| Author: Bucknall, Martin P.; De Nys, Rocky; Kumar, Naresh; Steinberg, Peter D.; Swanson, Rebecca L.; Williamson, Jane E. | COPYRIGHT 2004 Marine Biological Laboratory. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group.Copyright information

Larvae of the Australian sea urchin Holopneustes purpurascens are induced to settle and metamorphose (termed settlement herein) by a water-soluble compound produced by the red alga Delisea pulchra, the main host plant of new recruits. The settlement cue for H. purpurascens had previously been identified as a floridoside-isethionic acid complex, and this paper presents new evidence correcting that finding. The actual settlement cue produced by D. pulchra was isolated from the polar extract b...