Article: Controlled Field Release of a Waterborne Chemical Signal Stimulates Planktonic Larvae to Settle.(Statistical Data Included)

RICHARD K. ZIMMER [*]

Settlement rates and distributions of planktonic larvae are critical determinants of population dynamics in marine and freshwater benthic communities. On the basis of the principles of solute diffusion from a porous material, chemical-releasing collectors (CRCs) were engineered and tested in an estuary. Significantly more barnacle larvae (Balanus amphitrite) were found to colonize collectors emitting trace amounts of the synthetic peptide analog, glycyl-glycyl-L-arginine (5 x [10.sup.-8] M), than those emitting either seawater or an organic enrichment (glycyl-glycyl-L-histidine) control. The inductive compound is similar in structure to ...

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