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RE: MRs OF SLOTHS etc



<<Even megamammals can breed fast and young and produce populations that
cannot then be
supported by their environment (hence the proposed 'boom and bust' model for
elephant populations).>>

Well, "fast" is a relative term.  I suggest you check out the following
paper:

Janis, C. M. & M. Carrano. 1992. Scaling of reproductive turnover in
archosaurs and mammals: Why are large terrestrial mammals so rare? In: M.
Fortelius, L. Werdelin and A. Forst?n (eds.), Bjorn Kurten Memorial Volume,
Acta Zoologica Fennica 28: 201-216