The skin and hair of the southern elephant seal, Mirounga leonina (Linn.). IV. Annual cycle of pelage follicle activity and moult
John K. Ling
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- Author Affiliations
4 Links Road, Novar Gardens, Adelaide, SA 5040, Australia. Email: jpling@sa.chariot.net.au
Australian Journal of Zoology 60(4) 259-271 https://doi.org/10.1071/ZO12049
Submitted: 15 May 2012 Accepted: 13 November 2012 Published: 2 January 2013
Abstract
Hair growth stages, anagen, catagen and telogen, were diagnosed histologically in skin samples taken at Macquarie Island from 103 southern elephant seals – 11 pups, 56 immatures, 23 adult females and 13 adult males – in order to correlate hair follicle activity with field observations of this species’ unusual type of moult. The duration of the hair growth cycle in fully developed follicles is ~12 weeks. Hair follicles are active for 2–3 months before, during and after the moult haul-out and are resting at other times of the year. A high proportion of adult females appear to commence hair growth between 4 January and 2 February. While implantation of the blastocyst may be triggered by some astral event, such as daylength, it does not depend on completion of the moult, as suggested by previous authors. The pelage cycle is possibly controlled by an endogenous rhythm established during follicle development and subsequent growth and shedding of the natal coat, but the timing and duration of the moult haul-out may depend on the nutritional status of seals within each particular age–sex class. In adult seals this will be governed by terrestrial activities that involve fasting during the breeding and moulting seasons, whereas immature seals haul out and fast, not only to moult but some also come ashore and rest during winter. There may also be metabolic demands for materials for the complete replacement of the pelage, and much of the stratum corneum.
Additional keywords: control of hair growth, pelage cycles, reproductive status.
References
Arnould, J. P. Y. (2009). Southern fur seals Arctocephalus spp. In ‘Encyclopedia of Marine Mammals’. 2nd edn (Eds W. F. Perrin, B. Wursig and J. G. M. Thewissen.) pp. 1079–1084. (Academic Press: San Diego, CA).Boyd, I., Arnbom, T., and Fedak, M. (1993). Water flux, body composition, and metabolic rate during molt in female southern elephant seals (Mirounga leonina). Physiological Zoology 66, 43–60.
Carrick, R., and Ingham, S. E. (1962). Studies on the southern elephant seal, Mirounga leonina (L.). I. Introduction to the series. CSIRO Wildlife Research 7, 89–101.
| Studies on the southern elephant seal, Mirounga leonina (L.). I. Introduction to the series.Crossref | GoogleScholarGoogle Scholar |
Carrick, R., Csordas, S. E., and Ingham, S. E. (1962a). Studies on the southern elephant seal, Mirounga leonina (L.). IV. Breeding and development. CSIRO Wildlife Research 7, 161–197.
| Studies on the southern elephant seal, Mirounga leonina (L.). IV. Breeding and development.Crossref | GoogleScholarGoogle Scholar |
Carrick, R., Csordas, S. E., Ingham, S. E., and Keith, K. (1962b). Studies on the southern elephant seal, Mirounga leonina (L.). III. The annual cycle in relation to age and sex. CSIRO Wildlife Research 7, 119–160.
| Studies on the southern elephant seal, Mirounga leonina (L.). III. The annual cycle in relation to age and sex.Crossref | GoogleScholarGoogle Scholar |
Carter, H. B., and Clarke, W. H. (1957). The hair follicle group and skin follicle population of Australian Merino sheep. Australian Journal of Agricultural Research 8, 91–108.
| The hair follicle group and skin follicle population of Australian Merino sheep.Crossref | GoogleScholarGoogle Scholar |
Chase, H. B. (1954). Growth of the hair. Physiological Reviews 34, 113–126.
| 1:CAS:528:DyaG2cXhvFWqtQ%3D%3D&md5=b810d5d2695b7f220fc5b546d9aa0939CAS |
Ching, P. (1994). ‘The Hawaiian Monk Seal.’ (University of Hawaii Press: Honolulu.)
Corbett, J. L. (1964). Effect of lactation on wool growth of Merino sheep. Proceedings of the Australian Society of Animal Production 5, 138–140.
Craig, A. M. (1964). Histology of reproduction and the estrus cycle in the female fur seal, Callorhinus ursinus. Journal of the Fisheries Research Board of Canada 21, 773–811.
| Histology of reproduction and the estrus cycle in the female fur seal, Callorhinus ursinus.Crossref | GoogleScholarGoogle Scholar |
Dolnick, E. H., Warner, R. G., and Bassett, C. F. (1960). Influence of diet on fur growth. National Fur News 32, 12–13.
Downes, A. M., and Sharry, L. F. (1970). Measurement of wool growth and the response to nutritional changes. Australian Journal of Biological Sciences 24, 117–130.
Dry, F. W. (1926). Coat of the mouse (Mus musculus). Journal of Genetics 16, 287–340.
| Coat of the mouse (Mus musculus).Crossref | GoogleScholarGoogle Scholar |
Duby, R., and Travis, H. F. (1972). Photoperidic control of fur growth and reproduction in the mink (Mustela vison). The Journal of Experimental Zoology 182, 217–225.
| Photoperidic control of fur growth and reproduction in the mink (Mustela vison).Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DyaE3s%2FitlCisQ%3D%3D&md5=76fbd0610b6da7c3f99d1ff31007d600CAS |
Hammond, J., Jr (1953). ‘Effects of Artificial Lighting on the Reproductive and Pelt Cycles of Mink.’ (Hefner and Sons Ltd: Cambridge.)
Henderson, A. E. (1953). Fleece development and wool growth in the Romney lamb. The Journal of Agricultural Science 43, 12–53.
| Fleece development and wool growth in the Romney lamb.Crossref | GoogleScholarGoogle Scholar |
Kenyon, K. W. (1981). Monk seals – Monachus. In ‘Handbook of Marine Mammals. Vol. 2: Seals.’ (Eds S. H. Ridgway and R. J. Harrison.) pp. 195–220. (Academic Press: London.)
Kenyon, K. W., and Rice, D. W. (1959). Life history of the Hawaiian monk seal. Pacific Science 13, 215–252.
Kirkman, S. P., Bester, M. N., Pistorius, P. A., Hofmeyr, G. J. C., Jonker, F. C., Owen, R., and Strydom, N. (2003). Variation in the timing of moult in elephant seals at Marion Island. South African Journal of Wildlife Research 33, 79–84.
Laws, R. M. (1956). The elephant seal (Mirounga leonina, Linn.). III. The physiology of reproduction. Falkland Islands Dependency Survey, Scientific Report No.15.
Lightbody, H. D., and Lewis, H. B. (1929). The metabolism of sulfur. XV. The relationship of the protein and cystine content of the diet to the growth of hair in the white rat. The Journal of Biological Chemistry 82, 485–497.
| 1:CAS:528:DyaB1MXjtlKitQ%3D%3D&md5=674dd012aa3b9f222a2b17088f240de0CAS |
Lincoln, G. A., and Guiness, F. E. (1972). Effect of altered photoperiod on delayed implantation and moulting in roe deer. Journal of Reproduction and Fertility 31, 455–457.
| Effect of altered photoperiod on delayed implantation and moulting in roe deer.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DyaE3s%2FotlWrsQ%3D%3D&md5=ea4a9ed0860ad784a7d0c3c53dec8010CAS |
Ling, J. K. (1965a). Functional significance of sweat glands and sebaceous glands in seals. Nature 208, 560–562.
| Functional significance of sweat glands and sebaceous glands in seals.Crossref | GoogleScholarGoogle Scholar |
Ling, J. K. (1965b). Hair growth and moulting in the southern elephant seal, Mirounga leonina (Linn.). In ‘Biology of the Skin and Hair Growth’. (Eds A. G. Lyne and B. F. Short.) pp. 525–544. (Angus and Robertson: Sydney.)
Ling, J. K. (1966). The skin and hair of the southern elephant seal, Mirounga leonina (Linn.). I. The facial vibrissae. Australian Journal of Zoology 14, 855–866.
| The skin and hair of the southern elephant seal, Mirounga leonina (Linn.). I. The facial vibrissae.Crossref | GoogleScholarGoogle Scholar |
Ling, J. K. (1968). The skin and hair of the southern elephant seal, Mirounga leonina (Linn.). III. Morphology of the adult integument. Australian Journal of Zoology 16, 629–645.
| The skin and hair of the southern elephant seal, Mirounga leonina (Linn.). III. Morphology of the adult integument.Crossref | GoogleScholarGoogle Scholar |
Ling, J. K. (1970). Pelage and molting in wild mammals with special reference to aquatic forms. The Quarterly Review of Biology 45, 16–54.
| Pelage and molting in wild mammals with special reference to aquatic forms.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DyaE3c7ptFWqtQ%3D%3D&md5=0e6e6d5238dcfc155ea85b8be6568bbfCAS |
Ling, J. K. (1974). The integument of marine mammals. In ‘Functional Anatomy of Marine Mammals. Vol. 2’. (Ed. R. J. Harrison.) pp. 1–44. (Academic Press: London.)
Ling, J. K. (1977). Vibrissae of marine mammals. In ‘Functional Anatomy of Marine Mammals. Vol. 3’. (Ed. R. J. Harrison.) pp. 387–415. (Academic Press: London.)
Ling, J. K., and Bryden, M. M. (1981). Southern elephant seal Mirounga leonina (Linnaeus), 1758. In ‘Handbook of Marine Mammals. Vol. 2: Seals’. (Eds S. H. Ridgway and R. J. Harrison.) pp. 297–327. (Academic Press: London.)
Ling, J. K., and Button, C. E. (1975). The skin and pelage of grey seal pups (Halichoerus grypus Fabricius): with a comparative study of foetal and neonatal moulting in the pinnipedia. Rapports et Proces -Verbaux des Reunions. Conseil International pour L’Exploration de la Mer 169, 112–132. [Proceedings of a symposium held in Guelph, Canada, 14–17 August 1972 on ‘Biology of the Seal’ (Eds K. Ronald and A. W. Mansfield)].
Ling, J. K., and Thomas, C. D. B. (1967). The skin and hair of the southern elephant seal, Mirounga leonina (Linn.). II. Pre-natal and early post-natal development and moulting. Australian Journal of Zoology 15, 349–365.
| The skin and hair of the southern elephant seal, Mirounga leonina (Linn.). II. Pre-natal and early post-natal development and moulting.Crossref | GoogleScholarGoogle Scholar |
Ling, J. K., Nicholls, D. G., and Thomas, C. D. B. (1967). Immobilization of southern elephant seals with succinylchlorine chloride. Journal of Wildlife Management 31, 468–479.
| Immobilization of southern elephant seals with succinylchlorine chloride.Crossref | GoogleScholarGoogle Scholar |
Mohn, M. P. (1958). The effects of different hormonal states on the growth of hair in rats. In ‘The Biology of Hair Growth’. (Eds W. Montagna and R. A. Ellis.) pp. 335–398. (Academic Press: New York.)
Rand, R. W. (1955). Reproduction in the Cape fur seal (Arctocephalus pusillus). Proceedings of the Zoological Society of London 124, 717–740.
| Reproduction in the Cape fur seal (Arctocephalus pusillus).Crossref | GoogleScholarGoogle Scholar |
Rand, R. W. (1956). The Cape fur seal Arctocephalus pusillus (Schreber): its general characteristics and moult. South African Division of Fisheries Investigational Report No. 21, 52 pp.
Scheffer, V. B. (1962). Pelage and surface topography of the northern fur seal. North American Fauna No. 64, 206 pp.
Scheffer, V. B., and Johnson, A. M. (1963). Molt in the northern fur seal. US Fish and Wildlife Service Special Scientific Report, Fisheries No. 450, Washington, DC. 34 pp.
Spearman, R. I. C. (1968). A histochemical examination of the epidermis of the southern elephant seal (Mirounga leonina L.) during the telogen stage of hair growth. Australian Journal of Zoology 16, 17–26.
| A histochemical examination of the epidermis of the southern elephant seal (Mirounga leonina L.) during the telogen stage of hair growth.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaF1cXkt1Gnsrk%3D&md5=7ecda2f2852637aa704e6101848f3912CAS |
Temte, J. L. (1985). Photoperiod and delayed implantation in the northern fur seal (Callorhinus ursinus). Journal of Reproduction and Fertility 73, 127–131.
| Photoperiod and delayed implantation in the northern fur seal (Callorhinus ursinus).Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DyaL2M7gslOqug%3D%3D&md5=6543d16836e513b40f0de2e6af697041CAS |
Temte, J. L. (1991). Precise birth timing in captive harbour seals (Phoca vitulina) and Californian sea lions (Zalophus californianus). Marine Mammal Science 7, 145–156.
| Precise birth timing in captive harbour seals (Phoca vitulina) and Californian sea lions (Zalophus californianus).Crossref | GoogleScholarGoogle Scholar |
Temte, J. L. (1993). Latitudinal variation in the birth timing of captive California sea lions and other captive North Pacific pinnipeds. Fish Bulletin 91, 710–717.
Temte, J. L. (1994). Photoperiod control of birth timing in the harbour seal (Phoca vitulina). Journal of Zoology 233, 369–384.
| Photoperiod control of birth timing in the harbour seal (Phoca vitulina).Crossref | GoogleScholarGoogle Scholar |
Worthy, G. A., Morris, P. A., Costa, D. P., and Le Bouef, B. J. (1992). Molt energetics of the northern elephant seal (Mirounga angustirostris). Journal of Zoology 227, 257–265.
| Molt energetics of the northern elephant seal (Mirounga angustirostris).Crossref | GoogleScholarGoogle Scholar |
