Summary
The fine structure of seminiferous tubules from 5 crabeater, 2 leopard and 2 Ross seals showed that during the nonbreeding season the tubules were essentially similar in possessing spermatogenic and Sertoli cells. However, the tubules of leopard and Ross seals had more primary and secondary spermatocytes and spermatids than the crabeater seals. In general, the tubules were devoid of spermatozoa. The spermatids showed stages of maturation such as Golgi phase of acrosome formation, acrosomal cap formation and condensation of nuclei. Some spermatids degenerated in tubules. Both maturing and degenerating spermatids were closely associated with Sertoli cells. Junctional complexes with plaques of filaments were observed between Sertoli cells and the spermatogenic cells. Sertoli cells, irregular and polygonal, contained highly convoluted nuclei, strands of rough endoplasmic reticulum, smooth endoplasmic reticulum, Golgi complexes, small mitochondria, variable amounts of lipid droplets, lysosomes, lipofuscin granules and highly plicated plasma membranes. In brief, the spermatogenic activity had practically ceased in the testes and the animals probably secreted low levels of testosterone during the nonbreeding season.
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References
Bertram, G.C.L.: The biology of the Weddell and crabeater seals, with a study of the comparative behavior of the Pinnipedia. Sci. Rep. Graham Land Exped. 1934–1937. Br. Mus. Nat. Hist. Lond. 1, 1–139 (1940)
Bryan, J.H.D., Wolosewick, J.J.: Spermatogenesis revisited. II. Ultrastructural studies of spermiogenesis in multinucleate spermatids of the mouse. Z. Zellforsch. 138, 155–169 (1973)
Erickson, A.W., Mossman, H.W., Hensel, R.J., Troyer, W.A.: The breeding biology of the male brown bear (Ursus arctos). Zoologica Sci. Contri., N.Y. Zool. Soc. 53, 85–105 (1968)
Fawcett, D.W.: Ultrastructure and function of the Sertoli cell. In: Handbook of physiology, male reproductive system, Vol. 5, Sect. 7, Chap. 2, pp. 21–55 (eds. D.W. Hamilton and R.O. Greep). Washington, D.C.: American Physiological Society 1975
Harrison, R.J., Matthews, L.H., Roberts, J.M.: Reproduction in some Pinnipedia. Trans. Zool. Soc. Lond. 27, 437–540 (1952)
Joffre, J., Joffre, M.: Seasonal changes in the testicular blood flow of seasonally breeding mammals: Dormouse, Glis glis, ferret, Mustella furo, and fox, Vulpes vulpes. J. Reprod. Fertil. 34, 227–233 (1973)
Kenyon, K.W., Scheffer, U.B., Chapman, D.G.: A population study of the Alaska fur seal herd. Spec. Sci. Rep. U.S. Fish Wildl. Serv. 12, 1–77 (1954)
Laws, R.M.: The elephant seal (Mirounga leonina Linn). 2. General, social and reproductive behavior. Sci. Rep. Falkld. Isl. Depend. Surv. 13, 1–88 (1956)
Mansfield, A.W.: The breeding behaviour and reproductive cycle of the Weddell seal: (Leptonychotes weddelli Lesson). Sci. Rep. Falkld. Isl. Depend. Surv. 18, 1–41 (1958)
McLaren, J.A.: Some aspects of growth and reproduction of the bearded seal, Erignathus barbatus Erxleben. J. Fish. Res. Bd. Canada 15, 219–227 (1958a)
McLaren, J.A.: The biology of ringed seal, Phoca hispida Schreber, in the eastern Canadian Arctic. Bull. Fish. Res. Bd. Canada 118, 1–97 (1958b)
McMillin, J.M., Seal, U.S., Keenlyne, K.D., Erickson, A.W., Jones, J.E.: Annual testosterone rhythm in the adult white-tailed deer (Odocoileus virginianus borealis). Endocrinology 94, 1034–1040 (1974)
Oritsland, T.: Sealing and seals research in the Southwest Antarctic pack ice, September–October 1964. In: Antarctic Ecology 1, 367–376 (ed. M.W. Holdgate). New York: Academic Press 1970.
Roosen-Runge, E.C.: Comparative aspects of spermatogenesis. Biol. Reprod. 1, 24–39 (1969)
Short, R.V., Mann, T.: The sexual cycle of a seasonally breeding mammal, the roebuck (Capreolus capreolus). J. Reprod. Fertil. 12, 337–351 (1966)
Sinha, A.A., Erickson, A.W., Seal, U.S.: Fine structure of Leydig cells in crabeater, leopard and Ross seals. J. Reprod. Fertil. 49 (1977)
Smith, M.S.R.: Studies on the Weddell seal in McMurdo Sound, Antarctica. Ph.D. Thesis, pp. 1–161, University of Canterbury (1966)
Steinberger, E., Steinberger, A.: Spermatogenic function of the testis. In: Handbook of physiology, male reproductive system, Vol. 5, Sect. 7, Chap. 1, pp. 1–19 (eds. D.W. Hamilton and R.O. Greep). Washington, D.C.: American physiological Society 1975
Stirling, I.: Population dynamics of the Weddell seal (Leptonychotes weddelli) in McMurdo Sound, Antarctica, 1966–1968. Antarctic Res. 18, 141–161 (1971)
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This research was supported in part by National Science Foundation Grants G.U. 30270 and G.U. 29829X from the Office of Polar Program and by NIH Grant 5 R01 AM11-376
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Sinha, A.A., Erickson, A.W. & Seal, U.S. Fine structure of seminiferous tubules in antarctic seals. Cell Tissue Res. 178, 183–188 (1977). https://doi.org/10.1007/BF00219046
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DOI: https://doi.org/10.1007/BF00219046