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  Interaction of conspecific cues in Balanus amphitrite Darwin (Cirripedia) settlement assays: Continued argument for the single-larva assay
 
 
Titel: Interaction of conspecific cues in Balanus amphitrite Darwin (Cirripedia) settlement assays: Continued argument for the single-larva assay
Auteur: Elbourne, Peter D.
Veater, Robert A.
Clare, Anthony S.
Verschenen in: Biofouling
Paginering: Jaargang 24 (2008) nr. 2 pagina's 87-96
Jaar: 2008
Inhoud: Gregariousness in marine invertebrate larvae is an important regulator of benthic community structure. Previous laboratory settlement assays employing Balanus amphitrite Darwin cyprids found gregarious effects with as few as 3 larvae well-1, together with modulation of such effects by chemical cues. Here, the relationship between settlement rate and larval density was rigorously tested through a fully randomised design. Seawater conditioned with adult B.amphitrite was tested alongside unconditioned seawater to determine the effect of a conspecific cue on gregarious interactions. Gregarious effects were detected in both conditioned and unconditioned seawater at ≤4 larvae well-1. In untreated seawater, settlement rate increased linearly with larval density, levelling off at densities of ≥10 larvae well-1. In conditioned seawater, settlement induction was observed at ≤4 larvae well-1, switching to inhibition at 6, 8 and 10 larvae well-1, before asymptoting at the highest densities tested. These results advocate the use of individual larvae in laboratory assays that investigate factors stimulating barnacle settlement.
Uitgever: Taylor & Francis
Bronbestand: Elektronische Wetenschappelijke Tijdschriften
 
 

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