
Dear list,

I want to test whether the UD sizes of several tracked seabird 
individuals from 6 different breeding  colonies depends on the foraging 
target (on land or at sea) as  follows:

mod<-lmer(ud95~prop_land+(1|colony),data=dat);

I have one UD95 value for each individual, but the proportion of fixes 
on land are on a trip basis, i.e. several values for one individual. Do 
I need to include bird_id as random factor to exclude pseudo 
replication, though the response has only one value per individual???

Many thanks in advance.

Best,
Anna

data:

    bird_id colony FT_id year sex max_speed max_distnest  tot_dist       tdur mean_dist mean_distnest
1 HA1_2012  Amrum     1 2012   1  53.65358    36.008004 101.34099  7.5827778 0.4444780     15.867350
2 HA1_2012  Amrum     2 2012   1  63.88851    69.993403 149.00254  6.1788889 0.8186953     46.947190
3 HA1_2012  Amrum     3 2012   1  82.68318    70.532407 176.65181  7.7008333 0.7886241     48.160436
4 HA1_2012  Amrum     4 2012   1  56.25961     5.293994  15.11632  0.8130556 0.6298466      3.710259
5 HA1_2012  Amrum     5 2012   1  70.04150    71.002162 215.32017 12.6369444 0.5851092     42.360905
6 HA1_2012  Amrum     6 2012   1  71.40167    71.712123 213.43533 12.1355556 0.5995374     54.878232
   mean_speed  prop_sea   prop_land straightness   prop_day prop_night ft_start ft_start_s   ft_end ft_end_s
1   13.01700 0.9912664 0.008733624    0.3553153 0.08296943  0.9170306 21:34:09      77649 05:11:03    18663
2   25.24134 0.2786885 0.721311500    0.4697464 1.00000000  0.0000000 06:47:53      24473 13:00:35    46835
3   26.50082 0.1644444 0.835555600    0.3992736 0.92888890  0.0711111 04:28:00      16080 12:12:06    43926
4   22.27650 0.8000000 0.200000000    0.3502171 0.24000000  0.7600000 04:21:24      15684 05:12:12    18732
5   19.70902 0.3821138 0.617886200    0.3297516 0.84552850  0.1544715 03:05:05      11105 15:45:16    56716
6   22.07548 0.2997199 0.700280100    0.3359899 0.91596640  0.0840336 04:02:14      14534 16:12:19    58339

     ud95 ud50 id30  rd30 udoi50_colmean udoi95_colmean idoi30_colmean rdoi30_colmean
1 460.73 9.76 24.8 64.16          0.002         0.0985          1e-04         0.0059
2 460.73 9.76 24.8 64.16          0.002         0.0985          1e-04         0.0059
3 460.73 9.76 24.8 64.16          0.002         0.0985          1e-04         0.0059
4 460.73 9.76 24.8 64.16          0.002         0.0985          1e-04         0.0059
5 460.73 9.76 24.8 64.16          0.002         0.0985          1e-04         0.0059
6 460.73 9.76 24.8 64.16          0.002         0.0985          1e-04         0.0059


-- 
Anna-Marie Corman
Forschungs- und Technologiezentrum Westküste
Universität Kiel
Hafentörn 1
25761 Büsum
Germany
Tel : +49 (0)4834-604 263
Fax : +49 (0)4834-604 299




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