Swimming behavior and prey retention of the polychaete larvae Polydora ciliata (Johnston)

Benni Winding Hansen, Hans Henrik Jacobsen, Anders Andersen, Rodrigo Almeda, Troels Møller Pedersen, Anette M. Christensen, Birgitte Nilsson

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    Resumé

    The 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 microm 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.
    OriginalsprogEngelsk
    TidsskriftJournal of Experimental Biology
    Vol/bind213
    Udgave nummer18
    Sider (fra-til)3237-3246
    ISSN0022-0949
    StatusUdgivet - 2010

    Citer dette

    Hansen, B. W., Jacobsen, H. H., Andersen, A., Almeda, R., Pedersen, T. M., Christensen, A. M., & Nilsson, B. (2010). Swimming behavior and prey retention of the polychaete larvae Polydora ciliata (Johnston). Journal of Experimental Biology, 213(18), 3237-3246.
    Hansen, Benni Winding ; Jacobsen, Hans Henrik ; Andersen, Anders ; Almeda, Rodrigo ; Pedersen, Troels Møller ; Christensen, Anette M. ; Nilsson, Birgitte. / Swimming behavior and prey retention of the polychaete larvae Polydora ciliata (Johnston). I: Journal of Experimental Biology. 2010 ; Bind 213, Nr. 18. s. 3237-3246.
    @article{cef3271fb0274da682082ecd174582c5,
    title = "Swimming behavior and prey retention of the polychaete larvae Polydora ciliata (Johnston)",
    abstract = "The 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",
    author = "Hansen, {Benni Winding} and Jacobsen, {Hans Henrik} and Anders Andersen and Rodrigo Almeda and Pedersen, {Troels M{\o}ller} and Christensen, {Anette M.} and Birgitte Nilsson",
    year = "2010",
    language = "English",
    volume = "213",
    pages = "3237--3246",
    journal = "Journal of Experimental Biology",
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    Hansen, BW, Jacobsen, HH, Andersen, A, Almeda, R, Pedersen, TM, Christensen, AM & Nilsson, B 2010, 'Swimming behavior and prey retention of the polychaete larvae Polydora ciliata (Johnston)', Journal of Experimental Biology, bind 213, nr. 18, s. 3237-3246.

    Swimming behavior and prey retention of the polychaete larvae Polydora ciliata (Johnston). / Hansen, Benni Winding; Jacobsen, Hans Henrik; Andersen, Anders; Almeda, Rodrigo; Pedersen, Troels Møller; Christensen, Anette M.; Nilsson, Birgitte.

    I: Journal of Experimental Biology, Bind 213, Nr. 18, 2010, s. 3237-3246.

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    TY - JOUR

    T1 - Swimming behavior and prey retention of the polychaete larvae Polydora ciliata (Johnston)

    AU - Hansen, Benni Winding

    AU - Jacobsen, Hans Henrik

    AU - Andersen, Anders

    AU - Almeda, Rodrigo

    AU - Pedersen, Troels Møller

    AU - Christensen, Anette M.

    AU - Nilsson, Birgitte

    PY - 2010

    Y1 - 2010

    N2 - The 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

    AB - The 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

    UR - http://dx.doi.org/10.1242/jeb.038810

    M3 - Journal article

    VL - 213

    SP - 3237

    EP - 3246

    JO - Journal of Experimental Biology

    JF - Journal of Experimental Biology

    SN - 0022-0949

    IS - 18

    ER -

    Hansen BW, Jacobsen HH, Andersen A, Almeda R, Pedersen TM, Christensen AM et al. Swimming behavior and prey retention of the polychaete larvae Polydora ciliata (Johnston). Journal of Experimental Biology. 2010;213(18):3237-3246.