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Re: lizard growth [egg] question



Thank you!

Answers are coming in both ways, larger clutches and larger eggs, including one C-section reply. Evidently there are some taxa in which the clutch size is invariant. I suppose that includes (at least) those that lay but one or two eggs max.

David Peters




On Mar 17, 2008, at 1:51 AM, John Scanlon wrote:

Hi David,

For info on lizard (& snake) reproduction, I suggest a couple of places
worth looking at:
http://www.bio.usyd.edu.au/Shinelab/publications/publ.html
and
http://www.austmus.gov.au/herpetology/research/index.htm#encyclopedia


Generally small and large females within a species tend to differ in clutch
size rather than offspring size, though there may be exceptions. Closely
related species may differ considerably in clutch size, offspring size and
adult size; e.g. Shine (1980) found a specimen of Demansia 'atra' with much
larger oviducal eggs than others, allowing reidentification as the similar
but larger species D. papuensis.


Cheers,
John

-----------------------------------------------
Dr John D. Scanlon, FCD
Riversleigh Fossil Centre, Outback at Isa
riversleigh@outbackatisa.com.au
http://tinyurl.com/f2rby

"Get this $%#@* python off me!", said Tom laocoonically.

-----Original Message-----
From: David Peters [mailto:davidrpeters@earthlink.net]
Sent: 16 March, 2008 5:02 AM
To: Dinosaur Mailing List
Subject: lizard growth question

If lizards, such as Iguana, are sexually mature at half their final
size, are the juveniles and eggs of small mothers different in size
from those of large mothers? Or are Iguana eggs pretty much the same
size no matter the age and size of the mother?

References?

David Peters
new email address:
davidpeters@att.net