----- Forwarded message from
Taylor Luneau
Date: Thu, 15 Nov 2012
16:35:40 -0500
From: Taylor Luneau
Reply-To: Taylor Luneau
Subject: help
To: [email protected]
Salmon at Vermont Hatcheries in
comparison to Vermont rivers and have
recently run into a few problems. I was
hoping that you could help me
with some of the details and maybe offer advice
on the best way to
conduct some statistical tests using this
software.Ive assembled a large data set of pictures of atlantic salmon,
sampled at Ed weed hatchery, Eisenhower
national fish hatchery as well as the Huntington
river. We sampled the
two hatcheries over a series of months in 2011
and 2012. What i am
hoping to do is compare the fish at the two
hatcheries and look for differences in growth
based off of shape and
size. I would also like to compare the average
shapes and sizes of
each sample group to
the Huntington fish (our "wild" fish and
therefore our control).
To do this I have taken
pictures of each fish, (12 per sample/ 3
samples at each hatchery/ 1 sample at huntington
river) and used the
analysis programs
tpsutil and tpsdig2 to place landmarks on each fish,
at specific
locations, to generate the average shape of each fish and
how it differs from
the general population.
I was
wondering if you had any thoughts about how i could run these
geometric
morphometric analysis tests most efficiently or perhaps if
you knew anyone who
does and would be willing to help me? Overall, i
would like to
identify the geometric perimeters characteristic of a
smolt (A smolt is a
juvenile salmon which has developed to the point
where it begins to
migrate to the ocean) so as to provide hatchery
workers with the
general shape and size of a smolt ready for release
into the watershed.
What would you suggest to be the easiest and
quickest ways to do
this? Centroid size? Principle component analysis?
Do i need both? All
your help is greatly appreciated and i look
forward to speaking with you more
soon.
----- End
forwarded message
-----
Taylor
