Key points are not available for this paper at this time.
I.L. Boyd, J.P. Croxall, N.J. Lunn, K. Reid, Population Demography of Antarctic Fur Seals: The Costs of Reproduction and Implications for Life-Histories, Journal of Animal Ecology, Vol. 64, No. 4 (Jul., 1995), pp. 505-518
Boyd et al. (Sat,) studied this question.