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Do barnacle larvae respond to multiple settlement cues over a range of spatial scales? Hills, J.M.; Thomason, J.C.; Milligan, J.L.; Richardson, M. (1998). Do barnacle larvae respond to multiple settlement cues over a range of spatial scales?, in: Baden, S. et al. Recruitment, colonization, and physical-chemical forcing in marine biological systems: Proceedings of the 32nd European Marine Biology Symposium, held in Lysekil, Sweden, 16-22 August 1997. Developments in Hydrobiology, 132: pp. 101-111. https://dx.doi.org/10.1007/978-94-017-2864-5_9 In: Baden, S. et al. (1998). Recruitment, colonization, and physical-chemical forcing in marine biological systems: Proceedings of the 32nd European Marine Biology Symposium, held in Lysekil, Sweden, 16-22 August 1997. European Marine Biology Symposia, 32. Developments in Hydrobiology, 132. ISBN 978-0-7923-5273-0; e-ISBN 978-94-017-2864-5. IX, 380 pp. https://dx.doi.org/10.1007/978-94-017-2864-5 In: European Marine Biology Symposia. Is gerelateerd aan: Hills, J.M.; Thomason, J.C.; Milligan, J.L.; Richardson, M. (1998). Do barnacle larvae respond to multiple settlement cues over a range of spatial scales? Hydrobiologia 375: 101-111. https://dx.doi.org/10.1023/A:1017029627006, meer

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Beschikbaar in	Auteurs
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Documenttype: Congresbijdrage

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Trefwoorden

Biological settlement > Larval settlement Developmental stages > Larvae > Invertebrate larvae > Crustacean larvae Stimuli > Chemical stimuli Stimuli > Mechanical stimuli Substrate preferences Cyprinidae Rafinesque, 1815 [WoRMS] Marien/Kust

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Auteurs		Top
Hills, J.M. Thomason, J.C. Milligan, J.L. Richardson, M.

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Abstract

Numerous physical and biological factors have been identified which affect the probability of larvae settling on hard substrata. The spatial scale at which these factors operate ranges from km’s to sub-mm’s. The wide variety of cues that barnacle larvae respond to coupled with the subtleties of cue response to factors like surface roughness, suggests that larvae are fastidious in their choice of settlement sites and thus, (i) settlement is not rapid and, (ii) larvae carry out search behaviour to sample settlement cues. An experimental frame with settlement pits untreated or with either barnacle settlement factor, or cyprid settlement factor, or a squashed cyprid larvae were exposed for a duration of 10 minutes during the Semibalanus balanoides settlement season in the Clyde Sea, UK. A total of 102 of the 240 pits were settled within the 10 minutes. More settlement occurred in the chemically treated pits than the untreated pits suggesting that settlement can be both selective and rapid. Video-photography was carried out in the laboratory of the tracks of S. balanoides cyprids prior to settlement in pits. With untreated pits little search behaviour was identified, cyprids tended to encounter the pit and then settle. Pits treated with squashed cyprid showed a chemical cue-mediated behaviour with cyprids tending to slow down and carryout antennular crawling in the vicinity of the pit. The mean time from entering a 40 × 40 mm window around the pit and settlement was 24.9 s (n=11, SE=5.4). Within the last 1.25 s prior to settlement, cyprids settling in untreated pits moved faster than cyprids settling in CL treated pits (P < 0.01), with a 4 times difference between the mean speeds These data suggest that settlement can be rapid and the pre-settlement track does not necessarily display search behaviour.

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