Fantastic line of discussion I'm absolutely agree with Joe, when there is not a Phylogenetic context maybe the allometric correction would not have very much sense, because we are looking into only one generation so we really don't know very well if the shape we are looking for is product of environmental condition (that can be connected with plenty of variables like nutrition, stress, etc...) now as you asked there is multiple group of species so definitely in your idea there is some "historic factor" that provide the shape of one particular species. Now regarding the Ian example in Drosophila, I tested allometry into 60 species across the genus and there is definitely a pattern (indeed a beautiful one across the genus looking into the different clades) but looking into one particular group of species the "size" is indeed a very good trait to explain differences (like species from island, marsh or the typical cosmopolitan) cosmopolitan Drosophila have the simple small wing (very small). On the other hand, where maybe "makes sense" is in one single species after doing some quantitative genetics experiments and controlling the factors that could influence the size depending on your question... But I think if there is a simple species in the game the factors in one generation are indeed just the real biological meaning of your differences and I dont think a correction will have a very biological meaning... Now of course could be some exception to the rule and a Biogeographical question like bergmann rule, or another rule like that where the relationship is directly related to size maybe a correction could be ok to see how big there are the differences when the factor is included...
I would love to see more replies, nice topic to discuss Damien Best Hugo Benítez El mar., 14 jul. 2020 a las 14:55, Damien Esquerre (< [email protected]>) escribió: > Dear morpho community, > I have a philosophical question on size correction that should start an > interesting discussion. > When we are interested in seeing the effects of species or environmental > variables for example, on shape, people often first remove allometric > variation by computing the residuals of a shape ` size regression. This of > course, doesn't make sense if there are heterogeneous slopes and species > have different allometric trajectories (i.e. if the species*size term is > significant). > What do you think would be the most appropriate way to deal with this > situation then, if you are interested in environmental effects on shape? > Best regards, > Damien Esquerré > > -- > You received this message because you are subscribed to the Google Groups > "Morphmet" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/morphmet2/CAJiv7Cw0S2A%3D-kpEmknt-tUp92Vjy0hkiF%3DVF6C77NsFECP%2BMw%40mail.gmail.com > <https://groups.google.com/d/msgid/morphmet2/CAJiv7Cw0S2A%3D-kpEmknt-tUp92Vjy0hkiF%3DVF6C77NsFECP%2BMw%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- *Dr. Hugo A. Benítez* Profesor Asociado Centro de Investigación de Estudios Avanzados del Maule Universidad Católica del Maule Research Associate, University of Cambridge Museum of Zoology External Researcher Faculty of Agriculture, University of Zagreb Lab website: http://www.morphoshape.com <http://www.hugoabenitez.com> -- You received this message because you are subscribed to the Google Groups "Morphmet" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/morphmet2/CACTC4WqeQiyyLW0gGy%3Ds8jr%3DM0pXAJmuEqXGKUCAaxs3%3DOa%2BmA%40mail.gmail.com.
