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The Autecology of Cyathura Carinata (Crustacea: Isopoda) in a Cooling Water Discharge Lagoon

  • R. N. Bamber (a1)

Cyathura is a genus of Anthurid isopods represented by some fourteen estuarine species around the world (Miller & Burbanck, 1961). They are unusual amongst the isopods in that the majority of individuals in a population show protogynous hermaphroditism, adults breeding as females in their first year, then changing to males over the following winter (Legrand & Juchault, 1963; Burbanck & Burbanck, 1974). The adults are tubicolous, virtually incapable of swimming, and have limited mobility, resulting in disjunct, stable populations, some of which, in the case of C. polita (Stimpson), are known to have maintained the same locations and densities over a period of 20 years (Burbanck & Burbanck, 1975). The embryos develop within a marsupium or brood pouch on the thoracic somites of the female, and are released as interstitial juveniles 1 mm or more in length. With populations averaging 200 to 400 individuals per square metre, these animals are convenient for autecological studies. Indeed, Burbanck & Burbanck (1979) considered that as hardy, euryokous animals, consistent in their tolerance to fluctuating environmental conditions, and convenient for study, Cyathura species are ideal ‘indicator organisms’ in estuaries.

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M. Amanieu , 1969. Variations saisonniéres de la taille et cycle reproducteur à Arcachon de Cyathura carinata (Kröyer). Journal of Experimental Marine Biology and Ecology, 4, 7989.

R. N. Bamber , 1982. Sodium hexametaphosphate as an aid in benthic sample sorting. Marine Environmental Research, 7, 251255.

C. R. Boyden & C. Little , 1973. Faunal distributions in soft sediments of the Severn Estuary. Estuarine and Coastal Marine Science, 1, 203223.

M. P. Burbanck & W. D. Burbanck , 1974. Sex reversal of female Cyathura polita (Stimpson, 1855) (Isopoda, Anthuridae). Crustaceana, 26, 110112.

W. R. Howells , 1964. The macrofauna of the intertidal soils of the Towy Estuary, Carmarthen-shire. Annals and Magazine of Natural History, 7, 577607.

W. L. Kruczynski & C. B. Subrahmanyan , 1978. Distribution and breeding cycle of Cyathura polita (Isopoda: Anthuridae) in a Juncus roemerianus marsh of northern Florida. Estuaries, 1, 93100.

M. A. Miller & W. D. Burbanck , 1961. Systematics and distribution of an estuarine isopod crustacean, Cyathura polita (Stimpson, 1855), new comb., from the Gulf and Atlantic seaboard of the United States. Biological Bulletin. Marine Biological Laboratory, Woods Hole, Mass., 120, 6284.

D. H. Steele & V. J. Steele , 1975. The biology of Gammarus (Crustacea, Amphipoda) in the northwestern Atlantic. XI. Comparison and discussion. Canadian Journal of Zoology, 53, 11161126.

J. W. Wagele , 1979. Der Fortpflanzungszyklus von Cyathura carinata (Isopoda, Anthuridea) im Nord-Ostsee-Kanal. Helgoländer wissenschaftliche Meeresuntersuchungen, 32, 295304.

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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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