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Re: Dromeosaurid behavior........Pack hunting! (long)
"Thomas R. Holtz, Jr." wrote:
> At 04:10 PM 4/28/99 -0500, "Megaraptor" wrote:
> >I'm glad someone agrees with me. There are no real disadvantages to the
> >pack hunting life style.
> How about:
> 1. Competition with your siblings for food resources and mates.
> 2. Large necessary "home range" than an individual.
Wouldn't these actually be advantages instead of disadvantages? I mean,
strongest do survive, especially in carnivorous animals such as most
> for a couple?
> >In a pack you have:
> > 1.A close knit family that helps in the care of the young
> > 2.Several eyes on the look out for danger.
> > 3.You are able to bring down larger prey and able to feed better.
> >The discovery of the Tenontosaur skeleton and the several D.antirrhopus
> >skeletons only proves that at least on species of dromeosaurids hunted
> >in packs.
> Unfortunately, it doesn't prove it. It *could* be consistant with a Komodo
> dragon-model: one or two individuals bring down a prey item, then others
> (who were not involved with the kill nor are associated with killers by
> bloodline) come by to scavenge at the carcass.
I wouldn't think it would be consistent with the Komodo Dragon-model.
animals were built to kill in small, well organized packs.. These were
to be some of the most intelligent dinosaur at that time. With
comes organization, am I right?
> Also, I think that the site (where the babies were feeding on bones on large
> individuals) to which you refer is *NOT* a dromaeosaur site: it is Bakker's
> allosaur ("Wyomingraptor") site. Different dinosaur entirely.
I don't think it was the Allosaur "Wyoningraptor", I saw an episode of
Paleoworld that dealt with dromeosaurids and their life style. Bakker
showed a Tenontosaur bone with wounds from large and small dromeosaurid
> Yes, there are advantages to pack hunting. However, there are disadvantages
> being a solitary hunter, too. Or an "opportunistic gang hunter" (not an
> organized pack of close kin, but random members of a population who converge
> on a kill site: sharks, for instance).
It doesn't make sense to me that being opportunistic while hunting is a
advantage, it's more like a disadvantage. During the times of the year
most of the herds moved south for the dry season the dromeosaurids would
likely followed them.
> In Nature it is very rare for a single strategy to be "The Best". That is
> one of the reasons for the vast diversity of life now and in the past.
I don't know what you meant by "a single strategy being 'the best'"
> Incidentally, I think that Ostrom & Maxwell's work does show that
> _Deinonychus_ was a pack hunter.
Thank you, it was most likely only D.antirrhopus that was a pack hunter,
cannot rule out the rest of the dromeosaurids.
> However, demonstration of pack hunting in one species of dromaeosaur by no
> means shows that *all* dromaeosaurids were pack hunters: after all,
> _Panthera leo_ is a pack hunter par excellence, but its very close relative
> _Panthera tigris_ is a solitary or pair hunter for the most part.
True, maybe one or two species were solitary hunters and not pack
> Pack hunting is a specialized behavior, and it is contingent on the person
> proposing pack hunting for a particular fossil species to show some sort of
> evidence (taphonomic, for instance) supporting that hypothesis. Otherwise,
> the more common behaviors of solitary or "gang" hunting should be considered
> more likely.
"Gang hunting" isn't really hunting, it's more like an ambush. No
> Hope this helps.
Actually it does help a little.