Comparison of discharge mechanisms of Cnidarian cnidae and Myxozoan polar capsules

Reviews in Fisheries Science

Volumn 11, Issue 3, 2003, Pages 185-219

  Cannon, Quinn ^a   Wagner, Eric ^a  

^a UTAH DIVISION OF WILDLIFE RESOURCES   (United States)

Author keywords

Cnidae; Cnidaria; Eversion; Myxozoa; Nematocyst; Polar capsule; Polar filament

Indexed keywords

ANTHOZOA; CNIDARIA; COELENTERATA; EUKARYOTA; MYXOZOA;

EID: 2042492076     PISSN: 10641262     EISSN: None     Source Type: Journal    
DOI: 10.1080/10641260390244305     Document Type: Review

References (147)

1. Aerne, B.L., R.P. Stidwill, and P. Tardent. Nematocyst discharge in Hydra does not require the presence of nerve cells. J. Exp. Zool., 258: 137-141 (1991).
2. Anderson, P.A.V. and M.C. McKay. The electrophysiology of cnidocytes. J. Exp. Biol., 133: 215-230 (1987).
3. Ashcroft, F.M. Ion Channels and Disease. Academic Press, New York (2000).
4. Barnes, R.S.K., P. Calow, and P.J.W. Olive. The Invertebrates: A New Synthesis, 2nd Ed. Blackwell Scientific Publications, Cambridge, MA (1993).
5. Bernal, R.M., R. Tovar, J.I. Santos, and M. deLourdes Muñoz. Possible role of calmodulin in excystation of Giardia lamblia. Parasit. Res., 84: 687-693 (1998).
6. Blanquet, R.S. Ionic effects on discharge of the isolated and in situ nematocysts of the sea anemone, Aiptasia pallida: A possible role of calcium. Comp. Biochem. Physiol., 35: 451-461 (1970).
7. Blanquet, R.S. and H.M. Lenhoff. A disulfide-linked collagenous protein of nematocyst capsules. Science, 154: 152-153 (1966).
8. Brand, D.D., R.S. Blanquet, and M.A. Phelan. Collagenaceous, thiol-containing proteins of cnidarian nematocysts: a comparison of the chemistry and protein distribution patterns in two types of cnidae. Comp. Biochem. Physiol., 106b: 115-124 (1993).
9. Brinkman, M., D. Oliver, and U. Thurm. Mechanoelectric transduction in nematocytes of a hydropolyp (Corynidae). J. Comp. Physiol. A., 178: 125-138 (1996).
10. Brown, C.H. Keratins in invertebrates. Nature, 166: 439 (1950).
11. Burnett, J.W. and G.J. Gallon. Review article: the chemistry and toxicology of some venomous pelagic coelenterates. Toxicon, 15: 177-196 (1977).
12. Calder, D.R. Nematocysts of stages in the life cycle of Stomolophus meleagris, with keys to scyphistomae and ephyrae of some western Atlantic Scyphozoa. Can. J. Zool., 61: 1185-1192 (1982).
13. Carlgren, O. A contribution to the knowledge of the structure and distribution of cnidae in the Anthozoa. Lunds Univ. Arsskr. Avd. 2, 41: 1-24 (1940).
14. Carré, C. Hypothesis on the mechanism of cnidocyst discharge. Eur. J. Cell Biol., 20: 265-271 (1980).
15. Clark, S.D. and C.B. Cook. Inhibition of nematocyst discharge during feeding in the colonial hydroid Halocordyle disticha (= Pennaria tiarella): the role of previous prey-killing. Biol. Bull., 171: 405-416 (1986).
16. Cutress, C. An interpretation of the structure and distribution of cnidae in the Anthozoa. Syst. Zool., 4: 120-137 (1955).
17. Davies, E.H. Myxosporidian parasites from the fish of the River Lugg. J. Protozool., 15: 471-480 (1968).
18. Deroux, G. Un nouveau type de nématocystes rhopaloïdes (R. Weill, 1934): les eurytéles microbasiques (hétérotriches) semiophores. Compt. Rend. Acad. Sci., 263: 760-763 (1966).
19. Dujardin, F. Mémoire sur le développement des polypes hydraires et méduses. Ann. Sci Nat., 4: 257-281 (1845).
20. Ebran, N., S. Julien, N. Orange, B. Auperin, and G. Molle. Isolation and characterization of novel glycoproteins from fish epidermal mucus: correlation between their pore-forming properties and their antibacterial activities. Biochim. Biophys Acta, 1467: 271-280 (2000).
21. El-Matbouli, M., R.W. Hoffman, H. Schoel, T.S. McDowell, and R.P. Hedrick. Whirling disease: host specificity and interaction between the actinospore stage of Myxobolus cerebralis and rainbow trout Oncorhynchus mykiss. Dis. Aquat. Org., 35: 1-12 (1999).
22. Fänge, R. and D. Grove. Digestion, pp. 161-260. In: Fish Physiology Volume VIII: Bioenergetics and Growth. (Hoar, W.S., D.J. Randall, and J.R. Brett, Eds.). Academic Press, New York (1979).
23. Fantham, H.B., A. Porter, and L.R. Richardson. Some Myxosporidia found in certain freshwater fishes in Quebec Province, Canada. Parasitol., 31: 1-77 (1939).
24. Gitter, A.H., D. Oliver, and U. Thurm. Streptomycin inhibits nematocyte discharge in Hydra vulgaris by blockage of mechanosensitivity. Naturwissen., 80: 273-276 (1993).
25. Glaser, O.C. and C.M. Sparrow. The physiology of nematocysts. J. Exp. Biol., 6: 361-382 (1909).
26. Godknecht, A. and P. Tardent. Discharge and mode of action of the tentacular nematocysts of Anemonia sulcata (Anthozoa: Cnidaria). Marine Bio., 100: 83-92 (1988).
27. Goldberg, W.M. and G.T. Taylor. Coelenterate cnidae capsules: disulfide linkages revealed by silver cytochemistry and their differential responses to thiol reagents. Biol. Bull., 192: 1-16 (1997).
28. Golz, R. Apical surface of hydrozoan nematocytes: structural adaptations to mechanosensory and exocytotic functions. J. Morph., 222: 49-59 (1994).
29. Grosvenor, W. and G. Kass-Simon. Feeding behavior in Hydra. I. Effects of Artemia homogenate on nematocyst discharge. Biol. Bull., 173: 527-538 (1987).
30. Guilford, H.G. New species of Myxosporidia found in percid fishes from Green Bay (Lake Michigan). J. Parasitol., 49: 474-478 (1963).
31. Gupta, B.L. and T.A. Hall. Role of high concentrations of Ca, Cu and Zn in the maturation and discharge in situ of sea anemone nematocysts as shown by x-ray microanalysis of cryosection. pp. 77-95. In: Toxins, Drugs and Pollutants in Marine Animals. (Bolis, L., J. Zadunaisky, and R. Gilles, Eds.). Springer-Verlag, Heidelberg (1984).
32. Gurley, R.R. The Myxosporidia, or psorosperms of fishes, and the epidemics produced by them. U.S. Fish Commission Rep. 26: 65-304 (1894).
33. Hand, C. Present state of nematocyst research: types, structure and function, pp. 187-202. In: The Biology of Hydra. (Lenhoff, H.M. and W.F. Loomis, Eds.). University of Miami Press, Coral Gables, FL (1961).
34. Herrick, J.A. Two new species of Myxobolus from fishes of Lake Erie. Trans. Amer. Microscop. Soc., 55: 194-198 (1936).
35. Herrick, J.A. Some myxosporidian parasites of Lake Erie fishes. Trans. Amer. Microscop. Soc., 60: 163-170 (1941).
36. Hidaka, M. and R.N. Mariscal. Effects of ions on nematocysts isolated from acontia of the sea anemone Calliactis tricolor by different methods. J. Exp. Biol., 136: 23-34 (1988).
37. Hoffman, G.L., R.E. Putz, and C.E. Dunbar. Studies on Myxosoma cartilaginis n. sp. (Protozoa: Myxosporidea) of centrarchid fish and a synopsis of the Myxosoma of North American freshwater fishes. J. Protozool., 12: 319-332 (1965).
38. Holsltein, T. and P. Tardent. An ultrahigh-speed analysis of exocytosis: nematocyst discharge. Sci., 223: 230 (1984).
39. Hufnagel, L.A. and G. Kass-Simon. Functional anatomy of nematocyte innervation in battery cell complexes of the Hydra tentacle. pp. 519-529. In: The Biology of Nematocysts. (Hessinger, D.A. and H.M. Lenhoff, Eds.). Academic Press, New York (1988).
40. Iversen, E.S. A new Myxosporidian, Myxosoma squamalis, parasite of some salmonoid fishes. J. Parasitol., 40: 397-404 (1954).
41. Iwanzoff, N. Ueber den Bau, die Wirkungsweise un die Entwicklung der Nesselkapseln der Coelenteraten. Bull. Imp. Soc. Nat. Moscou, 10: 95 (1896).
42. Jensen, H.M. and S.R. Wellings. Development of the polar filament-polaroplast complex in a microsporidian parasite. J. Protozool., 19: 297-305 (1972).
43. Jones, C.S. The control and discharge of nematocysts in Hydra. J. Exp. Zool., 105: 25-57 (1947).
44. Kawaii, S., K. Yamashita, N. Nakai, and N. Fusetani. Intracellular calcium transients during nematocyst discharge in Actinulae of the hydroid, Tubularia mesembryanthemum. J. Exp. Zool., 278: 299-307 (1997).
45. Kepner, W.A., B.D. Reynolds, L. Goldstein, G. Britt, E. Atcheson, Q. Zielinski, and M.B. Rhodes. The discharge of nematocysts of Hydra, with special reference to the penetrant. J. Morph., 88: 23-47 (1951).
46. Kudo, R. Experiments on the extrusion of polar filaments of cnidosporidian spores. J. Parasitol., 4: 143-147 (1918).
47. Kudo, R.R. Myxosporidia. pp. 303-324. In: Problems and Methods of Research in Protozoology. (Hegner, R. and J. Andrews, Eds.). MacMillan Company, New York (1930).
48. Lacassagne, M. Deux nouveaux types de nématocystes astomocnides chez les Actinulides (Hydrozoaires): Les euryteloides spiroteles et aspiroteles. Comptes Rendus Acad. Sci., 266: 892-894 (1968a).
49. Lacassagne, M. Les anisorhizes atriches, nouveau type de nématocystes stomocnides presents chez deux formes d' Halammohydra (Hydrozoaires, Actinulides). Comptes Rendus Acad. Sci., 266: 2090-2092 (1968b).
50. Lentz, T.L. The Cell Biology of Hydra. North-Holland Publishing Company, Amsterdam (1966).
51. Lewis, W.M. and R.C. Summerfelt. A Myxosporidian, Myxobolus notemigoni sp. n., parasite of the golden shiner. J. Parasitol., 50: 386-389 (1964).
52. Lom, J. Notes on the extrusion and some other features of myxosporidian spores. Acta Protozool., 2: 321-327 (1964).
53. Lom, J. Notes on the ultrastructure and sporoblast development in fish parasitizing Myxosporidian of the genus Sphaeromyxa. Z. Zellforsch., 97: 416-437 (1969).
54. Lom, J. Phylum Myxozoa. pp. 36-52. In: Handbook of Protoctista: the Structure, Cultivation, Habitats and Life Histories of the Eukaryotic Microorganisms and Their Descendants Exclusive of Animals, Plants, and Fungi: A Guide to the Algae, Ciliates, Foraminifera, Sporozoa, Water Molds, Slime Molds and the Other Protoctists. (Margulis, L., J.O. Corliss, M. Melkonian, and D.J. Chapman, Eds.). Jones and Bartlett Publishers, Boston, MA (1989).
55. Lom, J. and I. Dyková. Sporogenesis and spore structure in Kudoa lunata (Myxosporea, Multivalvulida). Parasit. Res., 74: 521-530 (1988).
56. Lom, J. and I. Dyková. Protozoan Parasites of Fishes. Elsevier, Amsterdam (1992).
57. Lom, J. and P. de Puytorac. Studies on the myxosporidian ultrastructure and polar capsule development. Protistologica 1: 53-65 (1965).
58. Lom, J. and J. Vávra. Notes on the morphogenesis of the polar filament in Henneguya (Protozoa, Cnidosporidia). Acta Protozool., 3: 57-70 (1965).
59. Loomis, W.F. and H.M. Lenhoff. Growth and sexual defferentiation of Hydra in mass culture. J. Exp. Zool., 132: 555-574 (1956).
60. Lubbock, R. and W.B. Amos. Removal of bound calcium from nematocyst contents causes discharge. Nature, 290: 500-501 (1981).
61. Lubbock, R., B.L. Gupta, and T.A. Hall. Novel role of calcium in exocytosis: mechanism of nematocyst discharge as shown by x-ray microanalysis. Proc. Nat. Acad. Sci., USA 78: 3624-3628 (1981).
62. Lubbock, R. and G.A.B. Shelton. Electrical activity following cellular recognition of self and non-self in a sea anemone. Nature, 289: 59-60 (1981).
63. Mackie, G.O. and G.V. Mackie. Systematic and biological notes on living Hydromedusae from Puget Sound. Natl. Mus. Can. Bull., 199: 63-84 (1963).
64. Mariscal, R.N. The nature of the adhesion to shells of the symbiotic sea anemone Calliactis tricolor Leseur. J. Exp. Mar. Biol. Ecol., 8: 217-224 (1972).
65. Mariscal, R.N. Nematocysts. pp. 129-178. In: Coelenterate Biology. (Muscatine, L. and H.M. Lenhoff, Eds.). Academic Press, New York (1974).
66. Mariscal, R.N. Cnidaria: Cnidae: pp. 57-68. In: Biology of the Integument. I. Invertebrates. (Bereiter-Hahn, J., A.G. Maltowsky, and K.S. Richards, Eds.). Springer-Verlag, Berlin (1984).
67. Mariscal, R.N., C.H. Bigger, and R.B. McLean. The form and function of cnidarian spirocysts. 1. Ultra structure of the capsule exterior and relationship to the tentacle sensory surface. Cell Tissue Res., 168: 465-474 (1976).
68. Mariscal, R.N., E.J. Conklin, and C.H. Bigger. The ptychocyst, a major new category of cnida used in tube construction by a cerianthid anemone. Biol. Bull., 152: 392-405 (1977a).
69. Mariscal, R.N., E.J. Conklin, and C.H. Bigger. The putative sensory receptors associated with the cnidae of cnidarians. Scan. Electron. Microsc., 2: 959-963 (1978).
70. Mariscal, R.N., R.B. McLean, and C. Hand. The form and function of cnidarian spirocysts. III. Ultrastructure of the thread and the function of spirocysts. Cell Tissue Res., 178: 427-433 (1977b).
71. McKay, M.C. and P.A.V. Anderson. Preparation and properties of cnidocytes from the sea anemone Anthopleura elegantissima. Biol. Bull., 174: 47-53 (1988).
72. Millot, N. The dermal light sense. Symp. Zool. Soc. Lond. 23: 1-36 (1968).
73. Mire-Thibodeaux, P. and G.M. Watson. Direct monitoring of intracellular calcium ions in sea anemone tentacles suggests regulation of nematocyst discharge by remote, rare epidermal cells. Biol. Bull., 185: 335-345 (1993).
74. Mire-Thibodeaux, P. and G.M. Watson. Morphodynamic hair bundles arising from sensory cell/supporting cell complexes frequency-tune nematocyst discharge in sea anemones. J. Exp. Zool., 268: 282-292 (1994).
75. Palaniappan, S. and S.K. Sastry. Effects of electricity on microorganisms: a review. J. Food Processing Preserv. 14: 393-414 (1990).
76. Pantin, C.F.A. The excitation of nematocysts. J. Exp. Biol., 19: 294-310 (1942).
77. Parker, G.H. The reversal of ciliary movement in metazoans. Amer. J. Physiol., 13: 1-16 (1905).
78. Parker, G.H. The effector systems of actinians. J. Exp. Zool., 21: 461-484 (1916).
79. Parker, G.H. and M.A. Van Alstyne. The control and discharge of nematocysts, especially in Metridium and Physalia. J. Exp. Zool., 63: 329-344 (1932).
80. Peteya, D.J. The ciliary-cone sensory cell of anemones and cerianthids. Tissue Cell, 7: 243-252 (1975).
81. Phelan, M.A. and R.S. Blanquet. Characterization of nematocyst proteins from the sea anemones Aiptasia pallida and Pachycerianthus torreyi (Cnidaria: Anthozoa). Comp. Biochem. Physiol., 81b: 661-666 (1985).
82. Picken, L.E.R. A note on the nematocysts of Corynactis viridis. Quart. J. Microsc. Sci., 94: 203-227 (1953).
83. Picken, L.E.R. and R.J. Skaer. A review of researches on nematocysts. Symp. Zool. Soc. Lond., 16: 19-50 (1966).
84. Plehn, M. Uber die drehkrankheit der salmoniden Lentospora cerebralis (Hofer) Plehn. Arch. Protistenkd., 5: 145-166 (1904).
85. Robson, E.A. Nematocysts of Corynactis: the activity of the filament during discharge. Quart. J. Microsc. Sci., 94: 229-235 (1953).
86. Ruch, R.J. and C.B. Cook. Nematocyst inactivation during feeding in Hydra littoralis. J. Exp. Biol., 111: 31-42 (1984).
87. Russell, T.J. and G.M. Watson. Evidence for intracellular stores of calcium ions involved in regulating nematocyst discharge. J. Exp. Zool., 273: 175-185 (1995).
88. 2+. Mol. Physiol., 3: 89-97 (1983a).
89. Salleo, A., G. La Spada, G. Falzea, and M.G. Denaro. Discharging effectiveness of lyotropic anions on nematocysts of Pelagia noctiluca. Mol. Physiol., 6: 19-26 (1983b).
90. Salleo, A., G. La Spada, G. Falzea, and M.G. Denaro. Discharging effect of anions and inhibitory effect of divalent cations on isolated nematocysts of Pelagia noctiluca. Mol. Physiol., 5: 25-34 (1984).
91. Salleo, A., G. La Spada, M.G. Denaro, and G. Falzea. Effects produced by SCN- and thiglycolate on isolated nematocysts of Pelagia noctiluca. Cell. Mol. Biol., 32: 661-666 (1986).
92. Salleo, A., G. La Spada, and E.A. Robson. Discharge characteristics of nematocysts isolated from acontia of Calliactis parasitica. Marine Biol., 104: 459-464 (1990).
93. Salleo, A., G. La Spada, and R. Barbera. Gadolinium is a powerful blocker of the activation of nematocytes of Pelagia noctiluca. J. Exp. Biol., 187: 201-206 (1994).
94. Salleo, A., G. Musci, P.F.A. Barra, and L. Calabrese. The discharge mechanism of acontial nematocytes involves the release of nitric oxide. J. Exp. Biol., 199: 1261-1267 (1996).
95. Sandberg, D.M., P. Kanciruk, and R.N. Mariscal. Inhibition of nematocyst discharge correlated with feeding in a sea anemone, Calliactis tricolor (Leseur). Nature (London), 232: 263-264 (1971).
96. 2+-induced response. J. Exp. Biol., 156: 173-185 (1991).
97. Siddall, M.E., D.S. Martin, D. Bridge, S.S. Desser, and D.K. Cone. The demise of a phylum of protists: phylogeny of Myxozoa and other parasitic Cnidaria. J. Parasit., 81: 961-967 (1995).
98. Skaer, R.J. The secretion and development of nematocysts in a siphonophore. J. Cell Sci., 13: 371-393 (1973).
99. Skaer, R.J. and L.E.R. Picken. The structure of the nematocyst thread and the geometry of discharge in Corynactis viridis Allman. Phil. Trans. Roy. Soc. Lond. B., 250: 131-164 (1965).
100. Slautterback, D.B. Cytoplasmic microtubules. I. Hydra. J. Cell Biol., 18: 367-388 (1963).
101. Slautterback, D.B. and D.W. Fawcett. The development of the cnidoblasts of Hydra: an electron microscopic study of cell differentiation. J. Biophys. Biochem. Cytol., 5: 411-430 (1959).
102. Smith, S., J. Oshida, and H. Bode. Inhibition of nematocyst discharge in Hydra fed to repletion. Biol. Bull., 147: 186-202 (1974).
103. Smothers, J.F., C.D. von Dohlen, L.H. Smith, Jr., and R.D. Spall. Molecular evidence that the myxozoan protists are metazoans. Sci., 265: 1719-1721 (1994).
104. Stehr, C. Sporogenesis of the myxosporean Kudoa paniformis Kabata & Whitaker, 1981 infecting the muscle of the Pacific whiting, Merluccius productus (Ayres). J. Fish Dis., 9: 493-504 (1986).
105. Stidwell, R.P., T.G. Honegger, and P. Tardent. Polymerized actin in the apical region of hydra nematocysts. pp. 567-574. In: The Biology of Nematocysts (Hessinger, D.A. and H.M. Lenhoff, Eds.). Academic Press, New York (1988).
106. Storer, T.I., R.L. Usinger, R.C. Stebbins, and J.W. Nybakken. General Zoology, 15th Ed. McGraw-Hill, New York (1972).
107. Székely, C., A. El-Mansy, K. Molnar, and F. Baska. Development of Thelohanellus bovorkai and Thelohanellus nikolskii (Myxosporea: Myxozoa) in oligochaete alternate hosts. Fish Pathol., 33: 107-114 (1998).
108. Tardent, P. History and current state of knowledge concerning discharge of cnidae. pp. 309-333. In: The Biology of Nematocysts (Hessinger, D.A. and H.M. Lenhoff, Eds.). Academic Press, New York (1988).
109. Tardent, P. The cnidarian cnidocyte, a high-tech cellular weaponry. BioEssays, 17: 351-362 (1995).
110. Thorington, G.U. and D.A. Hessinger. Control of discharge: factors affecting discharge of cnidae. pp. 233-253. In: The Biology of Nematocysts (Hessinger, D.A. and H.M. Lenhoff, Eds.). Academic Press, New York (1988).
111. Thorington, G.U. and D.A. Hessinger. Control of cnidae discharge: III. Spirocysts are regulated by three classes of chemoreceptors. Biol. Bull., 178: 74-83 (1990).
112. Thorington, G.U. and D.A. Hessinger. Efferent mechanisms of discharging cnidae: II. A nematocyst release response in the sea anemone tentacle. Biol. Bull., 195: 145-155 (1998).
113. Undeen, A. Spore-hatching processes in some Nosema species with particular reference to N. algerae Vavra and Undeen. Misc. Publ. Entomol. Soc. Am., 11: 29-49 (1978).
114. Uspenskaya, A.V. The ecology and spreading of the pathogen of Myxosoma cerebralis (Hofer, 1903; Plehn, 1905) of trout in the fish ponds of the Soviet Union, pp. 47-55. In: Parasites and Diseases of Fish. Bulletin USSR Scientific Institute of Freshwater Fisheries 42. English translation. No. 60-51169. (Petrusheveski, G.K., Ed.). Office of Technical Services, U.S. Department of Commerce, Washington (1957).
115. Uspenskaya, A.V. New data on the life cycle and biology of Myxosporidia. Arch. Protistenkd., 126: 309-338 (1982).
116. Uspenskaya, A.V. Alternation of actinosporean and myxosporean phases in the life cycle of Zschokkella nova (Myxozoa). J. Euk. Microbiol., 42: 665-668 (1995).
117. Wagner, E.J., Q. Cannon, M. Smith, R. Hillyard, and R. Arndt. Extrusion of polar filaments of the Myxobolus cerebralis triactinomyxon by salts, electricity, and other agents, pp. 61-76. In: Whirling Disease: Reviews and Current Topics (Bartholomew, J.L. and J.C. Wilson, Eds.). American Fisheries Society, Symposium 29, Bethesda, MD (2002).
118. Wagner, G. On some movements and reactions of Hydra. Quart. J. Microsc. Sci. [N.S.], 48: 585-622 (1905).
119. Ward, H.B. Notes on North American Myxosporidia. J. Parasitol., 6. 49-64 (1919).
120. Watson, G.M. and D.A. Hessinger. Receptor-mediated endocytosis of a chemoreceptor involved in triggering the discharge of cnidae in a sea anemone tentacle. Tissue Cell, 19: 747-755 (1987).
121. Watson, G.M. and D.A. Hessinger. Localization of a purported chemoreceptor involved in triggering cnida discharge in sea anemone. pp. 255-272. In: The Biology of Nematocysts (Hessinger, D.A. and H.M. Lenhoff, Eds.). Academic Press, New York (1988).
122. Watson, G.M. and D.A. Hessinger. Cnidocyte mechanoreceptors are tuned to the movements of swimming prey by chemoreceptors. Sci., 243: 1589-1591 (1989a).
123. Watson, G.M. and D.A. Hessinger. Cnidocytes and adjacent supporting cells form receptor-effector complexes in anemone tentacles. Tissue Cell, 21: 17-24 (1989b).
124. Watson, G.M. and D.A. Hessinger. Chemoreceptor-mediated elongation of stereocilium bundles tunes vibration-sensitive mechanoreceptors on cnidocyte-supporting cell complexes to lower frequencies. J. Cell Sci., 99: 307-316 (1991a).
125. Watson, G.M. and D.A. Hessinger. Hair-bundles on anemone tentacles are tuned to higher frequencies by very low concentrations of exogenous proline. J. Cell Biol., 115: 250a (abstract) (1991b).
126. Watson, G.M. and D.A. Hessinger. Receptors for N-acetylated sugars may stimulate adenylate cyclase to sensitize and tune mechanoreceptors involved in triggering nematocyst discharge. Exp. Cell Res., 198: 8-16 (1992).
127. Watson, G.M. and D.A. Hessinger. Evidence for calcium channels involved in regulating nematocyst discharge. Comp. Biochem. Physiol., 107a: 473-481 (1994).
128. Watson, G.M. and R.R. Hudson. Frequency and amplitude tuning of nematocyst discharge by proline. J. Exp. Zool., 268: 177-185 (1994).
129. Watson, G.M. and R.N. Mariscal. Ultrastructure of nematocyst discharge in catch tentacles of the sea anemone Haliplanella luciae (Cnidaria: Anthozoa). Tissue Cell, 17: 199-213 (1985).
130. Watson, G.M. and J. Roberts. Localization of proline receptors involved in regulating nematocyst discharge. J. Exp. Zool., 270: 527-537 (1994).
131. Watson, G.M. and R.L. Wood. Colloquium on terminology. pp. 233-253. In: The Biology of Nematocysts (Hessinger, D.A. and H.M. Lenhoff, Eds.). Academic Press, New York (1988).
132. Weill, R. Contribution a l'étude des cnidaires et de leurs nématocystes: I. Recherches sur les nématocystes. Trav. Sta. Zool. Wimereux, 10-11: 1-701 (1934).
133. Weill, R. Une nouvelle catégorie de nématocystes: existence, chez Apolemia uvaria Eschh., de nématocystes birhopaloïdes. Comptes Rendus Acad. Sci., 258: 4343-4344 (1964).
134. Werner, B. Die nesselkapseln der Cnidaria, mit besonderer berucksichtigung der Hydroida. I. Klassification und bedeutung für die systematik und evolution. Helgol. Wiss. Meeresunters., 12: 1-39 (1965).
135. Westfall, J.A. Nematocysts of the sea anemone Metridium. Amer. Zool., 5: 377-393 (1965).
136. Williams, R.B. Control of the discharge of cnidae in Diadumene luciae (Verrill). Nature, 219: 959 (1968).
137. Wolf, K. and M.E. Markiw. Biology contravenes taxonomy in the Myxozoa: new discoveries show alternation of invertebrate and vertebrate hosts. Sci., 225: 1449-1452 (1984).
138. Xiao, C. and S.S. Desser. Actinosporean stages of myxozoan parasites of oligochaetes from Lake Sasajewun, Algonquin Park, Ontario: new forms of triactinomyxon and raabeia. J. Parasitol., 84: 998-1009 (1998).
139. Xiao, C., and S.S. Desser. The longevity of actinosporean spores from oligochaetes of Lake Sasajewun, Algonquin Park, Ontario, and their reaction to fish mucus. J. Parasitol., 86: 193-195 (2000).
140. Yanagita, T.M. Physiological mechanism of nematocyst responses in sea anemone II. Effects of electrolyte ions upon the isolated cnidae. J. Fac. Sci. Univ. Tokyo Sect. IV., 8: 381-400 (1959a).
141. Yanagita, T.M. Physiological mechanism of nematocyst responses in sea-anemone. VII. Extrusion of resting cnidae- its nature and its possible bearing on the normal settling response. J. Exp. Biol., 36: 478-494 (1959b).
142. Yanagita, T.M. Physiological mechanism of nematocyst responses in sea-anemone III. Excitation and anaesthetization of the nettling response system. Comp. Biochem. Physiol., 1: 123-139 (1960a).
143. Yanagita, T.M. Physiological mechanism of nematocyst responses in sea-anemone IV. Effects of surface-active agents on the cnidae in situ and in isolation. Comp. Biochem. Physiol., 1: 140-154 (1960b).
144. Yanagita, T.M. and T. Wada. Discharge-inducing concentrations of acids and bases for the nematocysts of sea-anemone. Natural Sci. Rep. Ochanomizu University, 4(1): 112-118 (1953).
145. Yanagita, T.M. and T. Wada. Effects of trypsin and thioglycollate upon the nematocysts of the sea anemone. Nature, 173: 171 (1954).
146. Yasutake, W.T. and E.M. Wood. Some Myxosporidia found in Pacific Northwest salmonids. J. Parasitol., 43: 633-642 (1957).
147. Yokoyama, H., K. Ogawa, and H. Wakabayashi. Chemoresponse of actinosporean spores of Myxobolus cultus to skin mucus of goldfish Carassius auratus. Dis. Aquat. Org., 21: 7-11 (1995).