Dear R community,
I am wondering what experimental design I am dealing with? I study the effect
of daily air temperature on daily body temperature of the overwintering turtles
(i.e. sleeping in soil). The model is a cosine wave with the air temperature as
a covariate.
Objects are 19 overwintering turtles. Data were combined over the three years.
Each turtle was studied only once during these years, while 2 turtles were
studied during two years (see table below). The study area was the same for
these three studied years. Turtles were overwintering in different sites within
this area.
Is that correct to treat the study years as a random effect? I understand that
I should incorporate autocorrelation model to account for daily variations in
turtles body temperature. Is there a spatial correlation between the three
study years, since the study was done within the same area?
Study year
turtle#
2005 year
1
2
3
4
5
6
7
2006 year
8
9
0
11
12
2006 year
13
14
15
4
16
17
18
12
19
Thanks for your help,
Julia
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