----- Forwarded message from andrea cardini -----
Date: Thu, 3 Jan 2013 07:05:55 -0500
From: andrea cardini
Reply-To: andrea cardini
Subject: RE: A little help IDing best landmarks?
To: [email protected]
I guess that the answer to what the 'best' landmark configuration is really
depends on the study question (see papers by Oxnard & O'Higgins, 2009, and
Klingenberg, 2008, both on homology and the links between morphometrics and
biology - full citations in Viscosi & Cardini, 2011, Plos One:
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0025630 ).
I am not sure what the issues might be, for instance, in terms of
generalizability of the results, if one keeps trying different
configurations but I would seriously think about it.
If you work on fragmented material, semilandmarks approaches might be
interesting. There's a very nice paper by Hublin, Gunz et al. (my apologies
if I am mis-citing the authors) where they managed to identify a fairly
small piece of bone found, if I remember well, in the sea, as a likely
Neanderthal. Gunz can tell you more on this and other refs.
Good luck.
Cheers
Andrea
At 21:00 26/12/2012 -0800, you wrote:
> ----- Forwarded message from "F. James Rohlf" ----- Date: Mon, 24
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> ----- End forwarded message ----- p{margin: 0;padding: 0;} >-----
Forwarded message from "F. James Rohlf" ----- > > Date: Mon, 24 Dec 2012
10:45:21 -0500 > From: "F. James Rohlf" > Reply-To:
[email protected] > Subject: RE: A little help IDing best
landmarks? > To: [email protected] > >If by ‘best� you mean
usefulness for discrimination between groups, >then a better approach is to
try computing a distance between group means >using various combinations of
landmarks. If leaving a landmark out makes it >much more difficult to
distinguish then that landmark must have been >important (or at least very
useful for discrimination). If you have large >sample sizes and not too
many landmarks then the distance should be the >generalized distance D. If
sample sizes are small then that cannot be done >but the reliability of
performing such tests would be low in any case. >Note: there cannot be a
[email protected]
[mailto:[email protected]] >Sent: Sunday, December 23,
2012 11:54 PM >To: [email protected] >Subject: Re: A little help
IDing best landmarks? >----- Forwarded message from "V.L.Roth" ----- >
>Date: Sat, 22 Dec 2012 23:44:14 -0500 >From: "V.L.Roth" >Reply-To:
"V.L.Roth" >Subject: Re: A little help IDing best landmarks? >To:
"[email protected]" >The median axis technique could be useful -&
VL Roth 1997 J.Morphology >232:107-132 (esp. pp.110-111) >On Dec 22, 2012,
at 10:15 PM, [email protected] wrote: >----- Forwarded
message from [email protected] ----- > >Date: Thu, 20
Dec 2012 22:32:56 -0800 >From: [email protected]
>Reply-To: [email protected] >Subject: A little help
IDing best landmarks? >To: [email protected] >----- Forwarded
message from [email protected] ----- > >Date: Thu, 20
Dec 2012 01:36:03 -0800 >From: [email protected]
>Reply-To: [email protected] >Subject: A little help
IDing best landmarks? >To: [email protected] >----- Forwarded
message from "Bissett, Thaddeus Geoffrey" ----- > >Date: Tue, 18 Dec 2012
07:34:56 -0500 >From: "Bissett, Thaddeus Geoffrey" >Reply-To: "Bissett,
Thaddeus Geoffrey" >Subject: A little help IDing best landmarks? >To:
"[email protected]" Hi, everyone, I wonder if a few folks >might
take a look at these and give me a little advice (link to the image >is
below). Essentially, I’m trying to ID landmarks that can effectively
>distinguish not only between something like the image at far left and the
>one at far right, but possibly even the far right vs. middle. There’s
>additional variability among my sample, but these are good specimens for
>reference (these are all to the same scale here). The ears, for example,
>may be rounded, pointed, or squared. I understand this is complex, but any
>suggestions at all would be welcome! Thanks! http://i.imgur.com/jMDon.jpg
> >----- End forwarded message ----- > >----- End forwarded message ----- >
>----- End forwarded message ----- > > >----- End forwarded message ----- >
>----- End forwarded message ----- > > > >
NO DOCX, XLSX AND PPTX, PLEASE!!!
COAUTHORS AND CONTRIBUTORS, PLEASE, FOR SHARING FILES, CONVERT THEM IN DOC,
XLS (UNLESS LONGER THAN 256 COLUMNS) AND PPT
Dr. Andrea Cardini
NEW ADDRESS: Dipartimento di Scienze Chimiche e Geologiche, Università di
Modena e Reggio Emilia, l.go S. Eufemia 19, 41121 Modena, Italy
FORMERLY: Dipartimento di Biologia, Universitá di Modena e Reggio Emilia,
via Campi 213, 41100, Modena, Italy
tel: 0039 059 2055017 ; fax: 0039 059 2055548
Centre for Anatomical and Human Sciences
University of Hull, Cottingham Road, Hull, HU6 7RX, UK
University of York, Heslington, York YO10 5DD, UK
Centre for Forensic Science , The University of Western Australia
35 Stirling Highway, Crawley WA 6009, Australia
E-mail address: [email protected], [email protected]
Webpage: http://sites.google.com/site/hymsfme/drandreacardini
and:
http://www.dscg.unimore.it/site/home/ricerca/aree-di-ricerca/evolution-taxon
omy-and-forensics.html
Editorial board for:
Zoomorphology:
http://www.springer.com/life+sciences/animal+sciences/journal/435
Journal of Zoological Systematics and Evolutionary Research:
http://www.wiley.com/bw/journal.asp?ref=0947-5745&site=1
Hystrix, the Italian Journal of Mammalogy:
http://www.italian-journal-of-mammalogy.it/
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