Principles of Regeneration by Richard J. Goss (Auth.)

By Richard J. Goss (Auth.)

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1957. The indestructible Hydra. Sci. Am. 197 (6): 118-125. BRIEN, P. 1960. The fresh-water Hydra. Am. Scientist 48: 461-475. BURNETT, A. L. 1961. The growth process in Hydra. /. Exptl. Tool. 146: 21-83. BURNETT, A. L. 1966. A model of growth and cell differentiation in Hydra. Am. Naturalist 100: 165-189. CAMPBELL, R. D. 1967. Tissue dynamics of steady state growth in Hydra littoralis. I. Patterns of cell division. Develop. Biol. 15: 487-502. CAMPBELL, R. D. 1967. Tissue dynamics of steady state growth in Hydra littoralis.

In the real hydra, only one head grows back, but each amputated head can reconstitute an entire organism. Hydras are capable of sexual reproduction, which they indulge in as a result of such adverse conditions as overcrowding, stagnant water, lowered temperatures and/or a rise in C 0 tension. In response to these conditions, gonads develop along the sides of the animal. Eggs are fertilized by sperm (usually from a different parent), and the zygote develops directly into a new polyp. Sexual reproduction may be permanently bypassed, however, by rearing hydras under constant optimal conditions, in which case they multiply indefinitely by asexual budding.

1953. The regression-replacement cycle of hydranths of Obelia and Campanularia. Physiol. Zool. 26: 319-327. CROWELL, S. 1961. Developmental problems in Campanularia. In "The Biology of Hydra and of Some Other Coelenterates" (H. M. Lenhoff and W. F. ), pp. 297-316. University of Miami Press, Coral Gables. DAVIS, L. V. 1966. Inhibition of growth and regeneration in Hydra by crowded culture water. Nature 212: 1215-1217. DAVIS, L. V. 1967. The source and identity of a regeneration-inhibiting factor in hydroid polyps.

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Principles of Regeneration by Richard J. Goss (Auth.)
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