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From: Carmelo Fruciano
Date: 3/12/18 9:51 PM (GMT-10:00)
To: MORPHMET
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 not be defined if the number of variables excee
elo Fruciano >
> Date: 3/12/18 9:51 PM (GMT-10:00)
> To: MORPHMET >
> 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 not be defined if the number
sage From: Carmelo Fruciano
Date: 3/12/18 9:51 PM (GMT-10:00) To: MORPHMET
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 not be defined if the number of
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 a
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?
T
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 dif
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 tried what you offered but I hav
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
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
t
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 fi
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