-------- Original Message -------- Subject: Re: allometry definition Date: Fri, 8 Apr 2011 12:00:46 -0400 From: Kim van der Linde <[email protected]> To: [email protected] CC: [email protected] Luis, I do not think that the definitions are actually that different. They all deal with size related changes in parts of a larger structure. Some insist that it is only relative to the whole body, but that is a definitional issue obscuring that size-related changes also occur within part of the head for example. The more important issue related to allometry is the context of geometric morphometrics is that you cannot adequately pinpoint where the allometry occurs. This is due to the nature of the game in which you have to analyze the shapes as a whole and then deduct from the wire-frame plots where the actual changes occur. If you are okay with that, you can use multivariate statistics to uncover the degree of allometry (multivariate allometry) in the shape as a whole. If you want to pinpoint more exactly where the (allometric) variation is located within a shape, you might want to read an article we wrote about exactly this topic. (Kim van der Linde & David Houle (2009). Inferring the nature of allometry from geometric data. Evolutionary Biology: 36(3): 311-322.) Hope this helps, Kim On 4/8/2011 10:39 AM, morphmet wrote:
-------- Original Message -------- Subject: allometry definition Date: Fri, 8 Apr 2011 10:30:53 -0400 From: luis bizzo <[email protected]> To: [email protected] Dear morphometricians, I have been reading about allometry and I see it as the shape change of a body part related to its size. However, in many publications and textbooks I read that allometry is the relationship between body size and its parts. That´s a scale relation, based solely on size. Bonduriansky and Day (2003) names it as trait allometry, and Shingleton et al (2009) as static allometry (a term already used for shape changes in Klingenberg, 1996). As I am dealing with both analyses I am not sure how to define allometry and how to diferentiate these two "types" of static allometry. Klingenberg (1996) and Wilson and Sánchez-Villagra (2010) used the terms bivariate allometry and multivariate allometry, but at least for me, the definition of allometry still holds ambiguous. Kind Regards, Luís Bizzo [email protected]
-- http://www.kimvdlinde.com
