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Re: Tyrannosaur age-population distributions

> Because their selected prey is generally smaller inhabitants of the
> ecosystem than the mature adults are hunting, there is not a significant
> overlap in prey competition.
> After the 20 year "milestone", the rigors of life and competition begin to
> take an their toll. Injuries, old age and environmental stresses make it
> increasingly harder to survive. Scavenging and kleptophagy become MORE
> dominant strategies in securing food than hunting live prey did in their
> youth ( works both ways, old individuals chase the very young from kills,
> while virile 20 year olds drive off old bulls from carcasses ) as both
> intraspecific behaviour within species and between other competing
> ( i.e. Gorgosaurs / Daspletosaurs, DP formation, Alberta ). . . prove to
> more and more of a disadvantage to older individuals.
> Eventually the oldest die off, either through starvation as inability to
> find accessible food sources depletes their energy reserves, or they are
> themselves preyed upon by other more ambitious adults (in times when
> scarcity of alternate food resource occurs in a particular geographic
> etc. . .)
> In terms of EQ, intellligence, etc. . . you only have to be smarter than
> your intended prey. . . everything is relative. . .

Dear Mike and List,

    I have noticed an almost identical predatory lifestyle in the North
American lawyer species Litigious maximus.

Please make sure to tip your waitress Cliff