Re: [MORPHMET] Re: Digitizing landmarks on live larvae

From: Carmelo Fruciano <c.fruci...@unict.it> Date: 3/12/18 9:51 PM (GMT-10:00) To: MORPHMET <morphmet@morphometrics.org> Subject: Re: ***SPAM*** [MORPHMET] Re: Digitizing landmarks on live larvae Dear Avi, I guess it's hard to formulate any rule of thumb. Some analyses might no

Re: ***SPAM*** [MORPHMET] Re: Digitizing landmarks on live larvae

;c.fru...@unict.it > > Date: 3/12/18 9:51 PM (GMT-10:00) > To: MORPHMET <morp...@morphometrics.org > > Subject: Re: ***SPAM*** [MORPHMET] Re: Digitizing landmarks on live larvae > > Dear Avi, > > I guess it's hard to formulate any rule of thumb. > > Some analyse

Re: ***SPAM*** [MORPHMET] Re: Digitizing landmarks on live larvae

sage From: Carmelo Fruciano <c.fruci...@unict.it> Date: 3/12/18 9:51 PM (GMT-10:00) To: MORPHMET <morphmet@morphometrics.org> Subject: Re: ***SPAM*** [MORPHMET] Re: Digitizing landmarks on live larvae Dear Avi, I guess it's hard to formulate any rule of thumb.

Re: ***SPAM*** [MORPHMET] Re: Digitizing landmarks on live larvae

Dear Avi, I guess it's hard to formulate any rule of thumb. Some analyses might not be defined if the number of variables exceed the number of observations. Some other analyses might be defined (there is many distance-based analyses nowadays which circumvent that problem). However, whether

Re: ***SPAM*** [MORPHMET] Re: Digitizing landmarks on live larvae

Hi Carmelo, Thank you for those answers. One more question please: I know that the number of specimens should exceed the number of the total landmarks (fixed-landmarks + semi-landmarks). Is there a rule of thumb of by how much or what ratio between specimens to semi-landmarks one should keep?

Re: ***SPAM*** [MORPHMET] Re: Digitizing landmarks on live larvae

Il 6/03/2018 4:44 PM, Avi Koplovich ha scritto: Hi Carmelo, Thank you for your answer. My project tests for the influence of kairomones of a predator fish on the morphology of Salamander larvae during its development. To do this, I take pictures every other week of larvae spawned from six

Re: [MORPHMET] Re: Digitizing landmarks on live larvae

Avi, I think these details are probably not of general interest, but we can continue separately. Don On Wed, Mar 7, 2018 at 12:36 PM, Avi Koplovich wrote: > Hi Don, > This surely solves my problem with considering landmark 40 as a fixed one > (it's not!). So I

Re: [MORPHMET] Re: Digitizing landmarks on live larvae

Hi Don, This surely solves my problem with considering landmark 40 as a fixed one (it's not!). So I tried what you offered but I have a few questions: 1. While digitizing according to a fan one should follow the intersections of the contour with the fan lines and repeat the same lines

Re: [MORPHMET] Re: Digitizing landmarks on live larvae

Avi, The reason landmark 40 is not a landmark is related to you definition of it as a point between two others. If it were simply the midpoint on a line connecting two other points, it would not represent any data that was not captured by the coordinates of the points used in the definition (it

[MORPHMET] Re: Digitizing landmarks on live larvae

Hi Carmelo, Thank you for your answer. My project tests for the influence of kairomones of a predator fish on the morphology of Salamander larvae during its development. To do this, I take pictures every other week of larvae spawned from six different females and assigned to 3 treatments: No