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Re: Dinosaur egg-laying contributed to extinction?



Doesn't Erickson's growth series in Albertosaurus rank along these lines too?

On Thu, Apr 19, 2012 at 11:37 AM, Thomas R. Holtz, Jr. <tholtz@umd.edu> wrote:
>> From: owner-DINOSAUR@usc.edu [mailto:owner-DINOSAUR@usc.edu]
>> On Behalf Of Henrique Niza
>> Sent: Thursday, April 19, 2012 10:40 AM
>> To: dinosaur@usc.edu
>> Subject: Re: Dinosaur egg-laying contributed to extinction?
>>
>> On Wed, Apr 18, 2012 at 10:49 AM, Erik Boehm
>> <erikboehm07@yahoo.com> wrote:
>> > So I guess the question is: how much evidence is there that
>> adolescent dinosaurs occupied different niches from the
>> mature adults in each of the major dino lineages?
>>
>> Such evidence exists for sauropods as shown in "Evidence for
>> gregarious behavior and age segregation in sauropod dinosaurs Timothy"
>> by S. Myersa & Anthony R. Fiorillob. There is also the idea
>> that juvenile/subadults Tyrannosaurus Rex occupied a
>> different niche than the larger and presumably slower adults.
>> But I believe nothing was yet published about this supposed
>> hypothesis.
>
> While it is true I have not yet published (in the formal literature) my work 
> on the ontogenetic shift of tyrannosaurids, Currie
> speculated on this phenomenon in Albertosaurus in:
>
> Currie, P.J. 2000. Possible evidence of gregarious behavior in 
> tyrannosaurids. Gaia 15: 271-277.
>
> Thomas R. Holtz, Jr.
> Email: tholtz@umd.edu   Phone: 301-405-4084
> Office: Centreville 1216
> Senior Lecturer, Vertebrate Paleontology
> Dept. of Geology, University of Maryland
> http://www.geol.umd.edu/~tholtz/
> Fax: 301-314-9661
>
> Faculty Director, Science & Global Change Program, College Park Scholars
> http://www.geol.umd.edu/sgc
> Fax: 301-314-9843
>
> Mailing Address:        Thomas R. Holtz, Jr.
>                        Department of Geology
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>



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