Hostname: page-component-6d856f89d9-26vmc Total loading time: 0 Render date: 2024-07-16T07:22:06.789Z Has data issue: false hasContentIssue false
  • English
  • Français

V.—Experiments and Observations on Crustacea: Part II. Moulting of Isopods

Published online by Cambridge University Press:  15 September 2014

John Tait
John Tait
Affiliation:
Laboratory of Physiology, Edinburgh University
Get access

Summary

(1) Ligia, like other iposods, moults in two stages. First the coverin of the abdomen with that of the posterior three thoracic segments is es uviated. About four days later the anterior covering is thrown off. Th external changes that occur in the cuticle as it ages, and the behaviou of the animal during moult, are described.

(2) At the moult the cuticle splits in two main directions: (i) transvers between the fourth and fifth (free) thoracic segments; (ii) longitudina at the coxotergal junctions of (free) thoracic segments 2 to 7, there being no coxotergal split in segment 1. Coxotergal splitting is an arthrostracai if not a peracaridan, feature.

(3) Ligiæ that have fasted for many weeks in sea-water may still moult normally. It follows that onset of the moult is determined by an underlying cyclic change, not as Réaumur suggested by simple growth of the animal. A second moult during the period of fast was not observed.

Type
Proceedings
Information
Proceedings of the Royal Society of Edinburgh , Volume 37 , 1918 , pp. 59 - 68
Copyright
Copyright © Royal Society of Edinburgh 1918

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES TO LITERATURE

Allee, W. C., Jour. Exper. Zool., vol. xv, 1913, pp. 283–289.Google Scholar
Aubin, P. A., Journ. Econ. Biol., vol. ix, 1914, pp. 15–20.Google Scholar
Calman, W. T., “Crustacea,” Lankester's Treatise on Zoology, pt. vii, 3rd fase, 1909, pp. 202, 203.Google Scholar
Friedrich, H., Ztschr. f. Naturw., Halle, vol. lvi, 1883, pp. 468, 469.Google Scholar
Hankó, B., Arch. f. Entw.-Mech., vol. xxxiv, 1912, p. 479.Google Scholar
Hansen, H. J., Ann. Mag. Nat. Hist., 6th ser., vol. xii, 1893, p. 424.Google Scholar
Herold, W., Zool. Jahrb., Abt. f. Anat. f. Ontog., vol. xxxv, 1913, pp. 446–481.Google Scholar
Leichmann, G., Biblioth. Zool., Heft 10, 1881, passim.Google Scholar
Lockwood, , Amer. Nat., vol. iv, 1870–1871, p. 261. (Ref. fr. Shipley, Camb. Nat. Hist., vol. iv, p. 275.)Google Scholar
Neměc, B., Sitzb. d. Böhm. Ges. d. Wiss., math.-nat. Cl., Nr. 45. 1895, p. 38.Google Scholar
Paul, J. H., and Sharpe, J. S., Jour. Physiol., vol. 1, 1916, p. 181.Google Scholar
Pierce, , U.S. Dept. Agric., Bur. of Entom., Bull. No. 64, pt. ii, 1907, pp. 15–22. (Ref. fromGoogle Scholar
Collinge, W. E., Scottish Naturalist, Oct. 1915, p. 302.)Google Scholar
Potts, F. A., Quart. Jour. Micr. Sc., vol. 1, 1906, p. 599.Google Scholar
Réaumur, R. A. F. De, Hist. (= Mem.) de l'Acad. Roy. des Sc., 1712, pp. 223–241; Reaumur, R. A. F. De, Hist. (= Mem.) de l'Acad. Roy. des Sc., 1718, pp. 263–274, esp. p. 271.Google Scholar
Robson, G., Quart. Jour. Mier. Sc., vol. lvii, 1912, p. 267.Google Scholar
Schöbl, J., Arch. f. mikr. Anat., vol. xvii, 1880, pp. 131, 132.Google Scholar
Schönichen, W., Ztschr. f. wiss. Zool., vol. lxv, 1898, pp. 169, 170.Google Scholar
Sexton, E. W., and Matthews, A., Jour. Mar. Biol. Ass., vol. ix, No. 4, 1913, p. 546.CrossRefGoogle Scholar
Smith, G., Quart. Jour. Micr. Sc., vol. lvii, 1912, pp. 251–265;Google Scholar
Smith, G., Quart. Jour. Micr. Sc., vol. lix, 1913, pp. 267–295.Google Scholar
Tait, J., Proc. Physiol. Soc., p. xl, Jour. Physiol., vol. xl, 1910.Google Scholar
Tait, J., Jour. Mar. Biol. Ass., vol. ix, No. 2, 1911, p. 195.Google Scholar
Tait, J., Proc. Roy. Soc. Edin., vol. xxxvii, 1917, pp. 50–58.Google Scholar
Verhoeff, K. W., Berlin. Entomol. Ztschr., vol. xlvi, 1901, pp. 19, 20.Google Scholar
Webb, W. M., and Sillem, C., The British Woodlice, London, 1906, pp. 13, 14.Google Scholar
Weber, M., Arch. f. mikr. Anat., vol. xix, 1881, pp. 598, 599.Google Scholar
Wege, W., Zool. Jahrb., Abt. f. alig. Zool. u. Physiol., vol. xxx, 1911, pp. 270–274.Google Scholar
Zuelzer, M., Arch. f. Entw.-Mech., vol. xxv, 1907, pp. 263 ff.Google Scholar