Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/75521
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dc.contributor.authorHansen, B. W.en_US
dc.contributor.authorJakobsen, H. H.en_US
dc.contributor.authorAndersen, A.en_US
dc.contributor.authorAlmeda García, Rodrigoen_US
dc.contributor.authorPedersen, T. M.en_US
dc.contributor.authorChristensen, A. M.en_US
dc.contributor.authorNilsson, B.en_US
dc.date.accessioned2020-11-13T13:53:14Z-
dc.date.available2020-11-13T13:53:14Z-
dc.date.issued2010en_US
dc.identifier.issn0022-0949en_US
dc.identifier.urihttp://hdl.handle.net/10553/75521-
dc.description.abstractThe behavior of the ubiquitous estuarine planktotrophic spionid polychaete larvae Polydora ciliata was studied. We describe ontogenetic changes in morphology, swimming speed and feeding rates and have developed a simple swimming model using low Reynolds number hydrodynamics. In the model we assumed that the ciliary swimming apparatus is primarily composed of the prototroch and secondarily by the telotroch. The model predicted swimming speeds and feeding rates that corresponded well with the measured speeds and rates. Applying empirical data to the model, we were able to explain the profound decrease in specific feeding rates and the observed increase in the difference between upward and downward swimming speeds with larval size. We estimated a critical larval length above which the buoyancy-corrected weight of the larva exceeds the propulsion force generated by the ciliary swimming apparatus and thus forces the larva to the bottom. This modeled critical larval length corresponded to approximately 1 mm, at which, according to the literature, competence for metamorphosis and no more length increase is observed. These findings may have general implications for all planktivorous polychaete larvae that feed without trailing threads. We observed bell shaped particle retention spectra with a minimum prey size of approximately 4 μm equivalent spherical diameter, and we found that an ontogenetic increase in maximum prey size add to a reduction in intra-specific food competition in the various larval stages. In a grazing experiment using natural seawater, ciliates were cleared approximately 50% more efficiently than similar sized dinoflagellates. The prey sizes retainable for P. ciliata larvae covers the microplankton fraction and includes non-motile as well as motile prey items, which is why the larvae are trophically positioned among the copepods and dinoflagellates. Not only do larval morphology and behavior govern larval feeding, prey behavior also influences the feeding efficiency of Polydora ciliata.en_US
dc.languageengen_US
dc.relationMICROROL - Role of microzooplankton in marine food webs dynamics: functional diversity, relevance in C, N and P cycles and trophic impact on primary producers (CTM2004-02575/MAR)en_US
dc.relation.ispartofJournal of Experimental Biologyen_US
dc.sourceJournal of Experimental Biology [ISSN 0022-0949], v. 213, n. 18, p. 3237-3246en_US
dc.subject251001 Oceanografía biológicaen_US
dc.subject.otherPolydora ciliataen_US
dc.subject.otherLow Reynolds number hydrodynamicsen_US
dc.subject.otherSwimming behavioren_US
dc.subject.otherPrey selectionen_US
dc.titleSwimming behavior and prey retention of the polychaete larvae Polydora ciliata (Johnston)en_US
dc.typeinfo:eu-repo/semantics/articleen_US
dc.typeArticleen_US
dc.identifier.doi10.1242/jeb.038810en_US
dc.description.lastpage3246en_US
dc.identifier.issue18-
dc.description.firstpage3237en_US
dc.relation.volume213en_US
dc.investigacionCienciasen_US
dc.type2Artículoen_US
dc.description.numberofpages10en_US
dc.utils.revisionen_US
dc.identifier.ulpgcNoen_US
dc.contributor.buulpgcBU-BASen_US
dc.description.jcr3,04
dc.description.jcrqQ1
dc.description.scieSCIE
item.grantfulltextopen-
item.fulltextCon texto completo-
crisitem.author.deptGIR ECOAQUA: Ecofisiología de Organismos Marinos-
crisitem.author.deptIU de Investigación en Acuicultura Sostenible y Ec-
crisitem.author.parentorgIU de Investigación en Acuicultura Sostenible y Ec-
crisitem.author.fullNameAlmeda García, Rodrigo-
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