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Divergence of Nematocysts in Two Colour Morphs of the Intertidal Beadlet Anemone Actinia Equina

Published online by Cambridge University Press:  11 May 2009

A. Louise Allcock ,
Phillip C. Watts  and
John P. Thorpe
Phillip C. Watts
Affiliation:
Port Erin Marine Laboratory, School of Biological Sciences, University of Liverpool, Port Erin, Isle of Man, IM9 6JA.
John P. Thorpe
Affiliation:
E-mail: [email protected]
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Extract

In the common intertidal sea anemone Actinia equina (Cnidaria: Actiniaria) the morphological plasticity and lack of hard parts has caused considerable debate as to what constitutes a species. Over the last several years genetic studies have indicated that this ‘species’ consists of various separate gene-pools which appear to function as cryptic biological species. Conventional taxonomy has often concentrated on the use of a cnidome, the type, structure and number of nematocysts ('stinging’ cells). However, the usefulness of nematocysts to distinguish among various morphs of A. equina and other anthozoan species has recently been questioned. Here we describe the first detailed study of nematocyst differences between two well characterized genetically differentiated morphs with different coloured pedal discs. Measurements were taken from each type of nematocyst in five different tissues. Contrary to expectations, clear and significant nematocyst differences were found between Actinia with red or pink pedal discs and others with green to grey pedal discs. These findings support previous electrophoretic studies and suggest that quantitative descriptions of the cnidome may accurately identify separate species within other genera of Anthozoa.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 78 , Issue 3 , August 1998 , pp. 821 - 828
Copyright
Copyright © Marine Biological Association of the United Kingdom 1998

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References

Brace, R.C. & Quicke, D.L.J., 1985. Further analysis of individual spacing within aggregations of the anemone Actinia equina. Journal of the Marine Biological Association of the United Kingdom, 65, 35–53.CrossRefGoogle Scholar
Brace, R.C. & Reynolds, H.A., 1989. Relative intraspecific aggression and pedal disc colour phenotypes of the beadlet anemone Actinia equina. Journal of the Marine Biological Association of the United Kingdom, 69, 273–278.CrossRefGoogle Scholar
Carlgren, O., 1900. Ostrafrikansche Actinien. Mitteilungen aus dem Naturhistorischen Museum in Hamburg, 17, 1–124.Google Scholar
Carlgren, O., 1940. A contribution to the knowledge of the structure and distribution of the cnidae in the Anthozoa. Lunds Universitets Årsskrift (N.F.), 36, 1–62.Google Scholar
Carter, M.A. & Thorpe, J.P., 1981. Reproductive, genetic and ecological evidence that Actinia equina var mesembryanthemum and var fragacea are not conspecific. Journal of the Marine Biological Association of the United Kingdom, 61, 71–93.CrossRefGoogle Scholar
Chia, F.S. & Koss, R., 1983. On the fine structure of the nematocysts in the planula larvae of a sea anemone, Anthopleura elegantissima. Biological Bulletin. Marine Biological Laboratory, Woods Hole, 12, 12–24.Google Scholar
Chintiroglou, C.C., 1996. Biometric study of Edwardsia claparedii (Panceri) cnidome (Actiniaria: Anthozoa). Belgian Journal of Zoology, 126, 177–180.Google Scholar
Chintiroglou, C.C. & Simsiridou, M., 1997. Biometric investigations on the cnidae of the sea anemone Actinia equina mediterranea from I sensu Schmidt, 1972. Israel Journal of Zoology, 43, 5–11.Google Scholar
Cutress, C.E., 1955. An interpretation of the structure and distribution of cnidae in the Anthozoa. Systematic Zoology, 4, 120–137.CrossRefGoogle Scholar
Dalyell, J.G., 1848. Rare and remarkable animals of Scotland represented from living subjects with practical observations on their nature. London: Van Voorst.Google Scholar
Donoghue, A.M., Quicke, D.L.J. & Brace, R.C., 1985. Biochemical genetic and acrorhagial characteristics of pedal disc colour phenotypes of Actinia equina. Journal of the Marine Biological Association of the United Kingdom, 65, 21–33.CrossRefGoogle Scholar
Doumenc, D., Chintiroglou, C.C. & Foubert, A., 1989. Variabilité du genre Telmatactis Gravier, 1918 (Actiniaria, Acontiaria, Isophelliidae). Bulletin du Muséum National d'Histoire Naturelle. Paris, 11A, 5–45.CrossRefGoogle Scholar
Fautin, D.G., 1988. Importance of nematocysts to Actinian taxonomy. In The biology of nematocysts (ed. D.A., Hessinger and H.M., Lenhoff), pp. 487–500. California: Academic Press.CrossRefGoogle Scholar
Godknecht, A. & Tardent, P., 1988. Discharge and mode of action of the tentacular nematocysts of Anemonia sulcata (Anthozoa: Cnidaria). Marine Biology, 100, 83–92.CrossRefGoogle Scholar
Gosse, P.H., 1860. Actinologia Britannica. A history of the British sea anemones and corals. London: Van Voorst.CrossRefGoogle Scholar
Johnston, G., 1847. A history of the British zoopyhtes. London: Van Voorst.Google Scholar
Lynch, S.M., 1996. Empirical studies of allozyme based ecological genetics of the genus Actinia (Anthozoa: Actiniaria) and other marine invertebrates. PhD thesis, University of Liverpool.Google Scholar
Manuel, R.L., 1988. British Anthozoa. London: Academic Press.Google Scholar
Minitab, 1991. MINITAB reference manual, Release 8. Rosemont, PA: Quickset Inc.Google Scholar
Perrin, M.C., 1993. Aspects of the ecology and genetics of Actinia colour morphs. PhD thesis, University of Liverpool.Google Scholar
Perrin, M.C., Thorpe, J.P. & Solé-Cava, A.M., in press. Actinia equina: a genetic role model and reproductive enigma. In Marine biology: a Port Erin perspective (centenary volume of the Port Erin marine laboratory) (ed. R.G., Hartnoll and S.J., Hawkins). London: Immel Publishing.Google Scholar
Quicke, D.L.J. & Brace, R.C., 1984. Evidence for the existence of a third ecologically distinct morph of the anemone Actinia equina. Journal of the Marine Biological Association of the United Kingdom, 64, 531–534.CrossRefGoogle Scholar
Quicke, D.L.J., Donoghue, A.M. & Brace, R.C., 1983. Biochemical genetic and ecological evidence that red/brown individuals of the anemone Actinia equina comprise two morphs in Britain. Marine Biology, 77, 29–37.CrossRefGoogle Scholar
Quicke, D.L.J., Donoghue, A.M., Keeling, T.F. & Brace, R.C., 1985. Littoral distributions and evidence for differential post-settlement selection on the morphs of Actinia equina. Journal of the Marine Biological Association of the United Kingdom, 65, 1–20.Google Scholar
Rice, W.R., 1989. Analyzing tables of statistical tests. Evolution, 43, 223–225.CrossRefGoogle ScholarPubMed
Schmidt, H., 1969. Die Nesselkapseln der Actinien und ihre differential diagnostiche Beudeutung. Helgoländer Wissenschaftliche Meeresuntersuchungen, 19, 284–317.CrossRefGoogle Scholar
Schmidt, H., 1971. Taxonomie, Verbreitung and variabilitat von Actinia equina Linné 1766 (Actiniaria; Anthozoa). Zeitschrift für die Zoologishe Systematik und Evolutionsforschung, 9, 16–19.Google Scholar
Schmidt, H., 1972. Prodromus zu einer Monographie der Mediterranen Aktinien. Zoologica, 121, 1–146.Google Scholar
Schmidt, H., 1982. Replacement of discharged cnidae in the tentacles of Ammonia sulcata. Journal of the Marine Biological Association of the United Kingdom, 62, 685–691.CrossRefGoogle Scholar
Shapiro, S.S. & Wilk, M.B., 1965. An analysis of variance test for normality (complete samples). Biometrika, 52, 730–737.CrossRefGoogle Scholar
Shick, J.M., 1991. A functional biology of sea anemones. London: Chapman & Hall.CrossRefGoogle Scholar
Solé-Cava, A.M., 1986. Studies of biochemical genetics and taxonomy in coelenterates and sponges. PhD thesis, University of Liverpool.Google Scholar
Solé-Cava, A.M. & Thorpe, J.P., 1987. Further genetic evidence for the reproductive isolation of the green sea-anemone Actinia prasina Gosse from the common intertidal beadlet anemone Actinia equina [L]. Marine Ecology Progress Series, 38, 225–229.Google Scholar
Solé-Cava, A.M. & Thorpe, J.P., 1992. Genetic divergence between colour morphs in populations of the common intertidal sea anemones Actinia equina and Actinia prasina (Anthozoa: Actiniaria) in the Isle of Man. Marine Biology, 112, 243–252.CrossRefGoogle Scholar
Solé-Cava, A.M., Thorpe, J.P. & Kaye, J.G., 1985. Reproductive isolation with little genetic divergence between Urticina (=Tealia) felina and U. eques (Anthozoa: Actiniaria). Marine Biology, 85, 279–284.Google Scholar
Stephensen, T.A., 1935. The British sea anemones. London: The Ray Society.Google Scholar
Tugwell, G., 1856. A manual of sea anemones commonly found on the English coast. London: Van Voorst.Google Scholar
Weill, R., 1934. Contribution a l'étude des cnidaires et de leurs nématocystes. Travaux de la Station Zoologique de Wimereux, 10, 1–701.Google Scholar
Williams, R.B., 1996. Measurements of cnidae from sea anemones (Cnidaria: Actiniaria): statistical parameters and taxonomie relevance. Scientia Marina, 60, 339–351.Google Scholar
Zar, J.H., 1984. Biostatistical analysis. New Jersey: Prentice Hall Inc.Google Scholar