RE: Dinosaur egg-laying contributed to extinction?

["Thomas R. Holtz, Jr." <tholtz@umd.edu>]

> 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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                        University of Maryland
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