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On the hormonal inhibition of moulting in decapod Crustacea II. The terminal anecdysis in crabs

Published online by Cambridge University Press:  11 May 2009

D. B. Carlisle
D. B. Carlisle
Affiliation:
The Plymouth Laboratory
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Extract

In many if not most species of crabs (but not quite all) there is a limit to growth, when no more moulting or ecdysis is possible in normal circumstances. This condition of permanent anecdysis is known as the terminal anecdysis. In the spider crab Maia squinado, the last moult is the moult of puberty, when the animal finally attains sexual maturity, and this moult has different biometrical characteristics from the others. In Carcinus maenas, in contrast, the moult of puberty takes place when the animal is quite small and may be succeeded by about ten further moults before the terminal anecdysis begins.

The immediate cause of the cessation of moulting in Maia squinado is shown to be the degeneration of the Y-organ, which secretes a moult-promoting hormone. In the absence of this gland and its secretion moulting can no longer continue. In Carcinus the Y-organ does not degenerate after the final ecdysis and the cause of the cessation of moulting is to be sought in the excessive production by the X-organ-sinus gland complex of the moultinhibiting hormone. This effectively prevents moulting from proceeding Removal of the X-organ-sinus gland complex in Carcinus allows ecdysis to continue, so that giant crabs can be produced in the laboratory by this means, and at the same time the life-span may be increased. The operation has no such effect on Maia. In either species injection of Y-organ extracts produces transiently the first signs of an approaching moult, in the form of a heightened blood-calcium level. In Carcinus repeated injection led to eventual ecdysis. The presence of the Y-organ is shown to be necessary for removal of the X-organ-sinus gland complex to stimulate moulting in Carcinus.

Two separate methods of producing terminal anecdysis exist in crabs, both involving the hormones which normally regulate the moult cycle, but no reason is known for the existence of the phenomenon.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 36 , Issue 2 , June 1957 , pp. 291 - 307
Copyright
Copyright © Marine Biological Association of the United Kingdom 1957

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References

Bliss, D. E., Durand, J. B. & Welsh, J. H., 1954. Neurosecretory systems in decapod Crustacea. Z. Zellforsch., Bd. 39, pp. 520–36.CrossRefGoogle Scholar
Brown, F. A. & Cunningham, O., 1939. Influence of the sinus-gland of crustaceans on normal viability and ecdysis. Biol. Bull, Woods Hole, Vol. 77, pp. 104–14.CrossRefGoogle Scholar
Carlisle, D. B., 1953. Moulting hormones in Leander (Crustacea Decapoda). J. mar. biol. Ass. U.K., Vol. 32, pp. 289–96.CrossRefGoogle Scholar
Carlisle, D. B., 1954. On the hormonal inhibition of moulting in decapod Crustacea. I. J. mar. biol. Ass. U.K., Vol. 33, pp. 61–3.CrossRefGoogle Scholar
Carlisle, D. B., 1955. On the hormonal control of water balance in Carcinus. Pubbl. Staz. zool. Napoli, Vol. 27, pp. 227–31.Google Scholar
Carlisle, D. B. & Dohrn, P. F. R., 1953. Studies on Lysmata seticaudata Risso (Crustacea Decapoda). II. Experimental evidence for a growth- and moult-accelerating factor obtainable from eyestalks. Pubbl. Staz. zool. Napoli, Vol. 24, pp. 69–83.Google Scholar
Cornubert, G., Démeusy, N. & Veillet, A., 1952. Effets de l'ablation des pédoncules oculaires sur le développement des caracteres sexuels externes des Décapodes Brachyoures Carcinus maenas Pennant et Pachygrapsus marmoratus Fabricius. C.R. Acad. Sci., Paris, T. 234, pp. 1405–7.Google Scholar
Démeusy, N., 1953. Comparaison biologique de deux populations de Carcinus maenas Pennant: mue de puberte. C. R. Acad. Sci., Paris, T. 236, pp. 1203–5.Google Scholar
Démeusy, N. & Veillet, A., 1953. Sur l'existence de deux populations de Carcinus maenas Pennant et sur les caracteres morphologiques qui les distinguent. C.R. Acad. Sci., Paris, T. 236, pp. 1088–90.Google Scholar
Echalier, G., 1954. Recherches experimentales sur le rôle de ‘l'organe Y’ dans la mue de Carcinus moenas (L.), Crustace ddcapode. C.R. Acad. Sci., Paris, T. 238, PP 523–5Google Scholar
Echalier, G., 1955. Role de l'organe Y dans le determinisme de la mue de Carcinides (Carcinus) moenas L. (Crustaces decapodes). Experiences d'implantation. C.R. Acad. Sci., Paris, T. 240, pp. 1581–3.Google Scholar
Finney, D. J., 1952. Statistical Method in Biological Assay. London, 661 pp.Google Scholar
Gabe, M., 1953. Sur l'existence, chez quelques Crustaces Malacostraces, d'un organe comparable a la glande de la mue des Insectes. C.R. Acad. Sci., Paris, T. 237, pp. 1111–13.Google Scholar
Hiatt, R. W., 1948. The biology of the lined shore crab, Pachygrapsus crassipes Randall. Pacif. Sci., Vol. 2, pp. 135–213.Google Scholar
Knowles, F. G. W. & Carlisle, D. B., 1956. Endocrine control in the Crustacea. Biol. Rev., Vol. 31, pp. 396–473.CrossRefGoogle Scholar
Passano, L. M., 1953. Neurosecretory control of moulting in crabs by the X organ-sinus gland complex. Physiol. comp., Vol. 3, pp. 155–89.Google Scholar
Richards, A. G., 1951. The Integument of Arthropods. Minneapolis, 411 pp.Google Scholar
Teissier, G., 1934. Differences sexuelles dans la croissance des appendices de Maia squinado (L.). C. R. Soc. Biol., Paris, T. 117, pp. 668–71.Google Scholar
Teissier, G., 1935. Croissance des variants sexuelles chez Maia squinado (L.). Trav. Sta. biol. Roscoff, Fasc. 13, pp. 93–130.Google Scholar
Teissier, G., 1937. Allométrie de taille et variabilité. C.R. Soc. Biol., Paris, T. 124, pp. 1071–3.Google Scholar
Teissier, G., 1955a. Sur la détermination de l'axe d'un nuage rectiligne de points. Biometrica, Vol. ii, pp. 344–56.CrossRefGoogle Scholar
Teissier, G., 1955 b. Allometrie de taille et variabilite chez Maia squinado. Arch. Zool. exp. gen., T. 92, pp. 221–64.Google Scholar