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Nematocyst composition of the cubomedusan Chiropsalmus quadrigatuschanges with growth

Abstract

The nematocysts of Chiropsalmus quadrigatus (Cubozoa; Cubomedusa; Chirodropidae) were examined to determine if their composition changes with an increase in body size. Fixed tentacles of specimens collected in Okinawa, Japan, were homogenized and their nematocysts were observed under a differential interference contrast microscope. Six nematocyst types were observed in medusae of all sizes microbasic mastigophores (MM), large and small trirhopaloids (lTR and sTR), holotrichous isorhizas (HI), ellipsoidal isorhizas (eI), and ovoid isorhizas (oI). Two other nematocysts, large ovoid isorhizas (loI) and microbasic euryteles (ME), were observed only in small individuals. There was also marked difference in proportion of tentacular nematocysts between small and large individuals. HI was the dominant type in small specimens, while MM and eI were predominant in large specimens. Nematocyst composition in the bell and pedalia also differed between small and large individuals. Bells of small medusae contained oI and sTR, while only oI were observed in most large individuals. The pedalia of small medusae had clusters of MM, ME, sTR, and oI. Such single clusters on pedalium bases were characteristic of small individuals. The pedalia of large individuals contained scattered oI. Tentacles of medusae are used for prey capture, so the changes in the major type of nematocysts in tentacles may reflect changes in prey type.

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References

  • A.C. Arneson (1976) Life History of Carybdea alata Reynaud, 1830. Master of Science thesis, Department of Marine Sciences University of Puerto Rico Mayaguez

    Google Scholar 

  • A.C. Arneson C.E. Cutress (1976) Life history of Carybdea alata Reynaud, 1830 (Cubomedusae) G.O. Mackie (Eds) Coelenterate Ecology and Behavior Plenum Press New York and London 227–236

    Google Scholar 

  • D.R. Calder (1983) ArticleTitleNematocysts of stages in the life cycle of Stomolophus meleagris, with keys to scyphistomae and ephyrae of some western Atlantic Scyphozoa Canadian Journal of Zoology 61 1185–1192 Occurrence Handle10.1139/z83-161

    Article  Google Scholar 

  • D.R. Calder E.C. Peters (1975) ArticleTitleNematocysts of Chiropsalmus quadrumanus with comments on the systematic status of the Cubomedusae Helgoländer Wissenschaftliche Meeresuntersuchungen 27 364–369

    Google Scholar 

  • T. Carrette P. Alderslade J. Seymour (2002) ArticleTitleNematocyst␣ratio and prey in two Australian cubomedusans, Chironex fleckeri and Chiropsalmus sp Toxicon 40 1547–1551 Occurrence Handle10.1016/S0041-0101(02)00168-X Occurrence Handle12419505 Occurrence Handle1:CAS:528:DC%2BD38XotlKhs7c%3D

    Article  PubMed  CAS  Google Scholar 

  • D.G. Fautin (1988) Importance of nematocysts to actinian taxonomy D.A. Hessinger H.M. Lenhoff (Eds) The Biology of Nematocysts Academic Press San Diego 487–500

    Google Scholar 

  • J. Rifkin R. Endean (1983) ArticleTitleThe structure and function of the nematocysts of Chironex fleckeri Southcott, 1956 Cell and Tissue Research 233 563–577 Occurrence Handle10.1007/BF00212225 Occurrence Handle6138157 Occurrence Handle1:STN:280:DyaL2c%2Fis1CjsA%3D%3D

    Article  PubMed  CAS  Google Scholar 

  • J.P. Studebaker (1972) Development of the Cubozoa, Carybdea marsupialis, Master of Science thesis, Department of Marine Sciences University of Puerto Rico College of Agriculture and Mechanical Arts Mayagues

    Google Scholar 

  • B. Werner C.E. Cutress J.P. Studebaker (1971) ArticleTitleLife cycle of Tripedalia cystophora Conant (Cubomedusae) Nature 5312 582–583

    Google Scholar 

  • J.A. Williamson P.J. Fenner J.W. Burnett J.F. Rifkin (Eds) (1996) Venomous and Poisonous Marine Animals–A Medical and Biological Handbook University of New South Wales Press Sydney

    Google Scholar 

  • Yamaguchi, M. & R. Hartwick, 1980. Early life history of the sea wasp, Chironex fleckeri (class Cubozoa). In Tardent, P. & R. Tardent (eds), Development and Cellular Biology of Coelenterates. Elsevier/North-Holland Biomedical Press: 11–16.

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Oba, A., Hidaka, M. & Iwanaga, S. Nematocyst composition of the cubomedusan Chiropsalmus quadrigatuschanges with growth. Hydrobiologia 530, 173–177 (2004). https://doi.org/10.1007/s10750-004-2692-2

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  • DOI: https://doi.org/10.1007/s10750-004-2692-2

Keywords

  • cnidae
  • ontogeny
  • acubomedusa