References
- Emery, K. O. 1941: Transportation of rock particles by sea mammals. J. Sediment. Petrol. 11, 92–93.
- Gjertz, I. & Wiig, O. 1992: Feeding of walrus Odobenus rosmarus in Svalbard. Polar Rec. 28, 57–59.
- Härkönen, T. 1989: Guide to the otoliths of the bony fishes of the northeast Atlantic. Danbiu, ApS, Hellerup, Denmark.
- Hamilton, J. E. 1933: The southern sea lion, Otaria byronia (De Blainville). Discovery Rep. 8, 269–318.
- Haug, T., Kroyer, A. B., Nilssen, K. T., Ugland, K. I. & Aspholni, P. E. 1991: Harp seal (Phoca groenlandica) invasions in Norwegian coastal waters: age composition and feeding habits. ICES J. Mar. Sci. 48. 363–371.
- King, J. E. 1983: Seals of the world. Oxford: Oxford University Press.
- Laws, R. M. 1956: The elephant seal (Mirounga leonina, Linn.) II. General, social and reproductive behaviour. Falkl. Isl. Depend. Surv., Lond. Scient. Rep. 13, 1–88.
- Ling, J. K. & Bryden, M. M. 1981: Southern elephant seal Mirounga leonina Linnaeus, 1758. Pp. 297-327 in: Ridgway, S. H. & Harrison, R. J. (eds): Handbook of Marine Mammals. Vol. 2: Seals. Academic Press, London.
- Lydersen, C., Angantyr, L. A., Wiig, O & Oritsland, T. 1991: Feeding habits of northeast Atlantic harp seals (Phoca groenlandica) along the summer ice edge of the Barents Sea. Can. J. Zool. 48, 2180-2183.
- Kumlien, L. 1879. Contributions to the natural history of Arctic America made in connection with the Howgate Polar Expedition, 1877-78. Bull. United States National Museum, No. 15. Government Printing Office. Washington.
- Mathews. L. H. 1929: The natural history of the elephant seal. with notes on other seals found at South Georgia. Discovery Rep. 1, 233–256.
- Mårtensson. P.-E., Nordoy. E. S. & Blix. A. S. 1994: Digestibility of crustaceans and capelin in harp seals (Phoca groenlandica). Mar. Mamm. Set. 10, 325–331.
- Nilssen. K. T., Haug, T., Potelov, V. & Timoshenko, Y. I992a: Preliminary data on feeding and condition of Barents Sea harp seals (Phoca groenlandica) throughout the year. ICES, CM 1992/N:5. 23 pp.
- Nilssen. K. T., Grotnes, P. E. & Haug. T. 1992b: The effect of invading harp seals (Phoca groenlandica) on local fish stocks of North Norway. Fish. Res. 13, 25–37.
- Ølen. N. & Øritsland. T. 1991: Recaptures of harp seals (Phoca groenlandica) tagged as pups in the Greenland Sea, pup production and dispersion patterns. Unpublished paper no. WP SEA-33 presented to the Joint ICES/NAFO Working Group on harp and hooded seals, Copenhagen, 14-18 October 1991. 21 pp.
- Riedman, M. 1990: The Pinnipeds. Seals, sea lions, and walruses. University of California Press, Los Angeles.
- Schmidt-Nielsen, K. 1984: Animal physiology: adaptation and environment. Cambridge University Press, Cambridge, UK.
- Sivertsen, E. 1941: On the biology of the harp seal Phoca groenlandica Erxl. Investigations carried out in the White Sea 1925-1937. Hvalradets, Skr. 26, 1–164.
- Spalding. D. J. 1964: Comparative feeding habits of the fur seal, sea lion, and harbour seal on the British Colombia coast. Bull. Fish. Res. Board Can. 146,1–52.