étude ostéo-morphométrique des tortues marines de ... - Seaturtle.org
étude ostéo-morphométrique des tortues marines de ... - Seaturtle.org
étude ostéo-morphométrique des tortues marines de ... - Seaturtle.org
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information (table 1) in many papers <strong>de</strong>aling with it in different places: Mexico, Arabian<br />
Peninsula, Africa (Frazier, 2005), Melanesia and Polynesia (Kirch and Yen, 1982; Kirch,<br />
1988; Frazier, 2003; Woodrom-Luna, 2003; Allen, 2006; Galipaud, 2006).<br />
Table 1. Number of archaeological sites compared to kinds of human use: aha,<br />
bones associated with human activity; wb, worked bones (cut marks, burns,<br />
hole, etc.), ahb, bones associated with human burials.<br />
aha wb ahb<br />
Caribbean, Yucatan, Florida ? 26 9<br />
Polynesia 13 ? ?<br />
Arabian Peninsula 6 4 1<br />
Over the last century, several studies have been <strong>de</strong>voted to sea turtle’s biometry (Duron-<br />
Dufrenne and Bour, 1988; Zangerl, 1988; Hirayama, 1992; Kamezaki, 1995, 2003; Pritchard,<br />
1997). Nowadays, as the field of statistics has <strong>de</strong>veloped, geometric morphometric methods<br />
can complement the traditional ones: they allow studying the geometry of real three<br />
dimensional shapes and not only ratios or angles, which often generate complex working<br />
hypothesis and problems for visualization.<br />
Here we present one such method, 2D landmarks, based on Procuste superimposition. It<br />
allows to separate size and shapes, allometry being a result of their combination. Landmarks<br />
method allows to statistically compare shape variations once the non-shape variations (size<br />
and residual) has been removed by superimposition (Adams et al., 2004).<br />
The aim is to un<strong>de</strong>rline and summarize the real shape and size variations to get an objective<br />
knowledge of bones morphological features and i<strong>de</strong>ntify the characteristics that can offer<br />
functional and i<strong>de</strong>ntification interest. During the growth, bones are changing with a shape<br />
component (in different directions) and a size component (respecting the initial shape).<br />
Allometries are the shape variation during the growth correlated to size.<br />
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