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And another one, bit more directly relevant:
Carbone et al 2011: Intra-guild competition and its implications for
one of the biggest terrestrial predators, Tyrannosaurus rex
On 19 April 2011 03:39, Vivian Allen <firstname.lastname@example.org> wrote:
> Here we go: published arguments for discussion
> Ruxton & Houston 2004: Obligate vertebrate scavengers must be large
> soaring fliers.
> Can't get the full pdf because I'm in a hotel. Looks pretty good though?
> On 19 April 2011 03:30, Augusto Haro <email@example.com> wrote:
>> 2011/4/18 Tim Williams <firstname.lastname@example.org>:
>>> When it comes to feeding on a carcass, the alvarezsaurs might well
>>> have been the last to arrive at the scene.
>> Yes, but in this case the specialized morphology of the forelimb seems
>> not so important for hide-cutting or breaking if carrion-eating.
>>> Having high visual and/or
>>> olfactory acuity may not have been so important, because (a) many
>>> carcasses would have been huge and (b) alvarezsaurs could be your
>>> typical camp-followers, and trailed larger predatory theropods with a
>>> view to a kill.
>> If large dinosaurs had low population densities, finding one by itself
>> would be difficult, more making a living of these. In addition, for
>> visual animals, it depends on how much exposed the corpse was. The
>> possibility of finding one also would depend on how fast animals with
>> greater acuity ingested the carcass after coming before. This does not
>> count if following animals with better senses, or if not living
>> primarily on corpses.
>>> I'm not suggesting that alvarezsaurs were obligate scavengers.
>>> However, as noted by Longrich & Currie (2008), ant nests were likely
>>> rare in the Mesozoic, and termitaria possibly absent altogether -
>>> leaving wood-nesting termites as the only common social insect
>>> contemporary with alvarezsaurs. So there would seem to be slim
>>> pickings indeed for a theropod that relied solely on ants and termites
>>> as its food source.
>> Agreed on the need to eat more than social insects, but it seems to me
>> more likely for they to pick small animals, seeds, or not though
>> plants, than carrion-eating, because of not having recurved beaks or
>> teeth. I think following large herbivores and searching for its
>> droppings may provide many seeds, and perhaps also insects if waiting
>> a time.