[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Fwd: Meter-wide "dinosaur" eggs reportedly found in Chechnya
- To: DINOSAUR Mailing List <DINOSAUR@usc.edu>
- Subject: Fwd: Meter-wide "dinosaur" eggs reportedly found in Chechnya
- From: John Bois <firstname.lastname@example.org>
- Date: Mon, 16 Apr 2012 18:13:38 -0400
- Authentication-results: msg-ip2.usc.edu; dkim=neutral (message not signed) header.i=none
- In-reply-to: <CALxBXrSY+GgV-v4bCv=j0_DdYifkx0m8jb9ngSBwXRDSUCcLGw@mail.gmail.com>
- References: <CAMR9O1LE1tkrf2C1GfxCiK4=F0gc4EWn9DugeANzX=v+prHfzA@mail.gmail.com> <f2da0075-6c15-4630-a36d-8c59d84b4533@pallando>
- Reply-to: email@example.com
- Sender: owner-DINOSAUR@usc.edu
On Mon, Apr 16, 2012 at 7:00 AM, Dr Ronald Orenstein
> Another point should be reproductive strategy. Even in a large animal egg
> size relates at some level to clutch size. The kiwi, of course, has a clutch
> size of one, but faces (or at least faced before we got to New Zealand with a
> bunch if exotics in tow) no really serious predation risk.
There is a study that compares Australian birds with close relatives
that are geologically-recent immigrants to NZ. This appears to be a
general trend...low predation leads to small clutch size and larger
egg...the luxury (due to low predation pressure) of being able to pour
more parental investment into fewer children.
>As I recall ostrich eggs are actually on the small side as bird eggs go in
>relation to the size of the adult.
Yes...and as a rule of thumb in birds (and probably non-avian
dinosaurs as well), the larger the parent, the smaller the egg in
relation to the parent.