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Seasonal reproductive activity in the pterobranch hemichordate Rhabdopleura compacta

  • Atsuko Sato (a1)
Abstract

Pterobranchs are small marine filter feeders in the phylum Hemichordata. Their phylogenetic position and anatomical structure has resulted in pterobranchs featuring in many scenarios concerning the evolution of chordates. Despite this interest, the basic reproductive biology of pterobranchs is still poorly known. To address this issue, the reproductive season of Rhabdopleura compacta was investigated by collecting specimens in 2004–2007 from a population growing on disarticulated bivalve shells off the south coast of Devon, UK. I analysed reproductive status by categorizing shells according to the condition of the colonies growing on them. The frequency of shells having mature females was almost constant from spring to autumn among shells with active colonies. However, it was apparent that: (a) shells having mature females were more likely to be incubating embryos or larvae in June and July than other months; and (b) the production of embryos was high in June, and then decreased by July. Thus, despite the previous speculation that the species is capable of successful sexual reproduction throughout the year, the present study shows seasonality in reproduction of R. compacta, with at least a peak season during summer.

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Corresponding author
Correspondence should be addressed to: Atsuko Sato Department of Zoology, University of OxfordSouth Parks Road, Oxford OX1 4JDUK email: atsuko.sato@zoo.ox.ac.uk
References
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Allman G.J. (1869) On Rhabdopleura, a new form of Polyzoa, from deep sea dredging in Shetland. Quarterly Journal of Microscopic Science 9, 5763.
Anderson K. (1903) Ein Weiterentdeckung von Cephalodiscus. Zooologische Anzeiger 26, 368369.
Barnes R.D. (1977) New record of a pterobranch hemichordate from the western hemisphere. Bulletin of Marine Science 27, 340343.
Bateson W. (1885) The late stages in the development of Balanoglossus Kowalevskii; with a suggestion on the affinities of the Enteropneusta. Quarterly Journal of Microscopic Science 25, 81122.
Bateson W. (1886) The ancestry of the Chordata. Quarterly Journal of Microscopic Science 26, 535571.
Boalch G.T. (2003) Local phytoplankton. MBA Annual Report, 2003, r3.
Boalch G.T. (2004) Local phytoplankton. MBA Annual Report, 2004, r5.
Boolootian R.A. (1963) Response of the testes of purple sea urchins to variations in temperature and light. Nature 197, 403.
Boulat S.J., Nielsen C., Lockyer A.E., Littlewood D.T.J. and Telford M.J. (2003) Xenoturbella is a deuterostome that eats molluscs. Nature 424, 925928.
Burdon-Jones C. (1957) The biology of Rhabdopleura normani Allman. Report of the Challenger Society 3, 9.
Cameron C.B., Garey J.R. and Swalla B.J. (2000) Evolution of the chordate body plan: new insights from phylogenetic analyses of deuterostome phyla. Proceedings of the National Academy of the United States of America 97, 4469–74.
Coma R., Ribes M., Gili J.M. and Zabala M. (2000) Seasonality in coastal benthic ecosystems. Trends in Ecology and Evolution 15, 448453.
Crisp D.J. and Spencer C.P. (1957) The control of the hatching process in barnacles. Proceedings of Royal Society of London, Series B 148, 278299.
Dilly P.N. (1973) The larva of Rhabdopleura compacta (Hemichordata). Marine Biology 18, 6986.
Eggleston D. (1972) Patterns of reproduction in the marine Ectoprocta of the Isle of Man. Journal of Natural History 6, 3138.
Emig C.C. (1979) British and other phoronids. London: Academic Press.
Fowler H.G. (1892) The morphology of Rhabdopleura normani Allman. Leipzig: Verlag von Wilhelm Engelmann.
Fowler H.G. (1904) Notes on Rhabdopleura normani, Allman. Quarterly Journal of Microscopic Science 48, 2331.
Gerhart J., Lowe C.J. and Kirschner M. (2005) Hemichordates and the origin of chordates. Current Opinions in Genetics and Development 15, 461467.
Giese A.C. and Pearse J.S. (1974) Reproduction of marine invertebrates, Volume 1. New York: Academic Press.
Gilchrist J.D.F. (1915) Observation on the Cape Cephalodiscus (C. gilchristi, Ridewood) and some of its early stages. Annals and Magazine of Natural History Series 8 16, 233243.
Gilchrist J.D.F. (1917) On the development of the Cape Cephalodiscus (C. gilchristi, Ridewood). Quarterly Journal of Microscopic Science 62, 189212.
Halanych K.M. (1995) The phylogenetic position of the pterobranch hemichordates based on 18S rDNA sequence data. Molecular Phylogenetics and Evolution 4, 72–6.
Harmer S.F. (1887) Appendix to ‘Report on Cephalodiscus dodecalophys’ by W.C. McIntosh. Report on the scientific results of the Voyage of H. M. S. Challenger during the years 1873–76 20, 3947.
Harmer S.F. (1905) The Pteronranchia of the Siboga Expedition. Siboga Expedition Monograph 26, 131.
Harmer S.F. (1915) Observations on the Cape Cephalodiscus (C. gilchristi, Ridewood) and some of its early stages. Annals and Magazine of Natural History Series 8, xvi 233247.
Harmer S.F. and Ridewood W.G. (1913) The Pterobranchia of the Scottish National Antarctic Expedition (1902–1904). Transactions of the Royal Society of Edinburgh 49, 531565.
Lankester E. (1884) Contribution to the knowledge of Rhabdopleura. Quarterly Journal of Microscopic Science 24, 622647.
Lester S.M. (1985) Cephalodiscus sp. (Hemichordata: Pterobranchia): observations of functional morphology, behavior and occurrence in shallow water around Bermuda. Marine Biology 85, 263268.
Lester S.M. (1988a) Settlement and metamorphosis of Rhabdopleura normani (Hemichordata: Pterobranchia). Acta Zoologica (Stockholm) 69, 111120.
Lester S.M. (1988b) Ultrastructure of adult gonads and development and structure of the larva of Rhabdopleura normani. Acta Zoologica (Stockholm) 69, 95109.
Lowe C.J., Wu M., Salic A., Evas L., Lander E., Stange-Thomann N., Gruber C.E., Gerhart J. and Kirschner M. (2003) Anterior–posterior patterning in hemichordates and the origin of the chordate nervous system. Cell 113, 853–65.
Lowe C., Terasaki M., Wu M., Freeman R.M., Runft L., Kwan K., Haigo S., Aribiwicz J., Lander E., Gruber C., Smith M., Krischner M. and Gerhart J. (2006) Dorsoventral patterning in hemichordates: insights into early chordate evolution. PLoS Biology 4, e291.
Masterman A.T. (1900) On the further anatomy and budding processes of Cephalodiscus dodecalophus (McIntosh). Transactions of the Royal Society of Edinburgh 39, 507527.
M'Intosh W.C. (1887) Report on Cephalodiscus dodecalophus. Report on the scientific results of the Voyage of H. M. S. Challenger during the years 1873–76 20, 137.
Millar R.H. (1970) British ascidians. London: Academic Press.
Rychel A.L., Smith S.E., Echimamoto H.T. and Swalla B.J. (2006) Evolution and development of chordates: collagen and pharyngeal cartilage. Molecular Biology and Evolution 23, 541549.
Sars O. (1874) On Rhabdopleura mirabilis (M. Sars). Quarterly Journal of Microscopic Science 14, 2344.
Schepotieff A. (1907) Die Pterobranchier. 1. Teil. 1. Abschnitt. Die Anatomie von Rhabdopleura. Zoologische Jahrbucher Abteilung für Anatomie und Ontogenie der Tiere 23, 463534.
Schepotieff A. (1909) Die Pterobranchier der indischen Ozean. Zoologische Jahrbucher Abteilung für Anatomie und Ontogenie der Tiere 28, 429448.
Starr M., Himmelman J.H. and Therrianlt J.-C. (1990) Direct coupling of marine invertebrate spawning with phytoplankton blooms. Science 247, 10711074.
Stebbing A.R.D. (1968) Discovery of Rhabdopleura (Hemichordata) at Plymouth. Nature 217, 1284.
Stebbing A.R.D. (1970a) Aspects of the reproduction and life cycle of Rhabdopleura compacta (Hemichordata). Marine Biology 5, 205212.
Stebbing A.R.D. (1970b) The status and ecology of Rhabdopleura compacta (Hemichordata) from Plymouth. Journal of the Marine Biological Association of the United Kingdom 50, 209221.
Stebbing A.R.D. and Dilly P.N. (1972) Some observations on living Rhabdopleura compacta (Hemichordata). Journal of the Marine Biological Association of the United Kingdom 52, 443448.
Wickstead J.H. (1976) Marine zooplankton. London: Edward Arnold.
Winchell C.J., Sullivan J., Cameron C.B., Swalla B.J. and Mallatt J. (2002) Evaluating hypothesis of deuterostome phylogeny and chordate evolution with new LSU and SSU ribosomal DNA data. Molecular Biology and Evolution 19, 762776.
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Journal of the Marine Biological Association of the United Kingdom
  • ISSN: 0025-3154
  • EISSN: 1469-7769
  • URL: /core/journals/journal-of-the-marine-biological-association-of-the-united-kingdom
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