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Further studies on the biology of the deep-sea spider crab Dorhynchus thomsoni: instar sequence and the annual cycle
Hartnoll, R.G.; Rice, A. (1985). Further studies on the biology of the deep-sea spider crab Dorhynchus thomsoni: instar sequence and the annual cycle, in: Gibbs, P.E. (Ed.) Proceedings of the 19th European Marine Biology Symposium, Plymouth, Devon, UK, 16-21 September 1984. pp. 231-243
In: Gibbs, P.E. (Ed.) (1985). Proceedings of the Nineteenth European Marine Biology Symposium, Plymouth, Devon, UK, 16-21 September 1984. European Marine Biology Symposia, 19. Cambridge University Press: Cambridge. ISBN 0-521-30294-3. 541 pp., meer
In: European Marine Biology Symposia., meer
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Documenttype: Congresbijdrage
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  • Hartnoll, R.G.
  • Rice, A.
Abstract
    The growth and reproduction of the small spider crab Dorhynchus thomsoni is described from specimens taken at 1200m depth in the Porcupine Seabight. The species has the normal spider crab growth in that it does not moult after sexual maturity. Most individuals become mature in the third post-larval instar, but a few do so in the fourth or fifth instar. Mature instars are morphologically distinct in both sexes. Eggs are laid in summer and autumn, and hatch in the following spring and early summer. The majority pass through the larval and immature instars to moult to the mature instar a year after hatching. Most females lay for the first time in the year they become mature, and then in each succeeding year.
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