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Garde, Eva; Frie, Anne K; Dunshea, Glenn; Hansen, Steen H; Kovacs, Kit Maureen; Lydersen, Christian (2010): (Table 2) Age determination of harp seals (Pagophilus groenlandicus) from the Barents Sea - comparison of methods. PANGAEA, https://doi.org/10.1594/PANGAEA.810152, Supplement to: Garde, E et al. (2010): Harp seal ageing techniques-teeth, aspartic acid racemization, and telomere sequence analysis. Journal of Mammalogy, 91(6), 1365-1374, https://doi.org/10.1644/10-MAMM-A-080.1

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Abstract:
Lower jaws (containing the teeth), eyes, and skin samples were collected from harp seals (Pagophilus groenlandicus) in the southeastern Barents Sea for the purpose of comparing age estimates obtained by 3 different methods, the traditional technique of counting growth layer groups (GLGs) in teeth and 2 novel approaches, aspartic acid racemization (AAR) in eye lens nuclei and telomere sequence analyses as a proxy for telomere length. A significant correlation between age estimates obtained using GLGs and AAR was found, whereas no correlation was found between GLGs and telomere length. An AAR rate (k Asp) of 0.00130/year ± 0.00005 SE and a D-enantiomer to L-enantiomer ratio at birth (D/L 0 value) of 0.01933 ± 0.00048 SE were estimated by regression of D/L ratios against GLG ages from 25 animals (12 selected teeth that had high readability and 13 known-aged animals). AAR could prove to be useful, particularly for ageing older animals in species such as harp seals where difficulties in counting GLGs tend to increase with age. Age estimation by telomere length did not show any correlation with GLG ages and is not recommended for harp seals.
Coverage:
Median Latitude: 69.300000 * Median Longitude: 42.875000 * South-bound Latitude: 68.400000 * West-bound Longitude: 40.167000 * North-bound Latitude: 70.200000 * East-bound Longitude: 45.583000
Date/Time Start: 2006-04-09T00:00:00 * Date/Time End: 2006-04-24T00:00:00
Event(s):
BarentsSea_seal * Latitude Start: 68.400000 * Longitude Start: 40.167000 * Latitude End: 70.200000 * Longitude End: 45.583000 * Date/Time Start: 2006-04-09T00:00:00 * Date/Time End: 2006-04-24T00:00:00 * Location: Barents Sea * Method/Device: Biological sample (BIOS)
Comment:
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
Sample IDSample IDGarde, Evaharp seal no.
SexSexGarde, Eva
Aspartic acid D/L ratioAsp D/LGarde, Evacorrected values
Pagophilus groenlandicus, ageP. groenlandicus ageaGarde, EvaAgeing, aspartic acid racemization (AAR) in eye lens nuclei
Pagophilus groenlandicus, standard deviationP. groenlandicus std dev±Garde, EvaAgeing, aspartic acid racemization (AAR) in eye lens nucleiAAR age
Pagophilus groenlandicus, ageP. groenlandicus ageaGarde, EvaAgeing, counting growth layer groups (GLG) in teeth
Size:
527 data points

Data

Download dataset as tab-delimited text — use the following character encoding:


Sample ID
(harp seal no.)

Sex

Asp D/L
(corrected values)

P. groenlandicus age [a]
(Ageing, aspartic acid racemiz...)

P. groenlandicus std dev [±]
(AAR age, Ageing, aspartic aci...)

P. groenlandicus age [a]
(Ageing, counting growth layer...)
18F0.030298.41.310
19F0.021591.71.12
20M0.0483822.41.716
21M0.0323810.11.37
22M0.0471121.41.716
23F0.019460.11.11
24M0.01807-1.01.12
28M0.023703.41.25
35AM0.0561428.42.022
37F0.022892.71.11
39F0.025434.71.25
40M0.0511424.51.822
41F0.0548927.41.925
440.022292.31.14
46M0.024764.21.25
47M0.023233.01.15
49M0.027446.31.28
50M0.0484822.51.716
51F0.0540226.71.918
54F0.024974.31.25
55M0.027616.41.27
57M0.025164.51.26
58M0.0359712.81.412
59F0.0522225.31.915
60F0.0522525.41.920
61M0.0543227.01.916
63M0.0377114.21.513
64F0.0536726.51.919
65M0.0544427.01.919
66M0.0555427.91.919
67F0.0574829.42.023
68M0.0327010.31.412
70M0.028597.11.39
71F0.0619532.82.125
72F0.01844-0.71.11
73M0.0430918.31.618
74M0.0465020.91.718
75M0.020280.71.13
76M0.0456920.31.714
79F0.0577829.62.014
80M0.028437.01.38
81F0.024183.71.26
84F0.0576029.52.024
85M0.0338011.11.411
86M0.0506924.21.820
87M0.0458720.41.718
88F0.025194.51.26
91F0.024183.71.26
92M0.0419517.41.625
94F0.022642.51.15
95M0.0513424.71.812
96F0.0497123.41.816
97M0.020000.51.12
98F?0.0483522.41.720
99M0.0381014.51.513
100M0.0467921.21.720
101M0.031889.71.39
104M0.0424317.81.621
105F0.01899-0.31.11
106M0.020681.01.12
107M0.023513.21.22
108F0.0535826.41.918
109M0.0324210.11.311
111M0.0441619.11.618
112M0.0342411.51.414
113M0.021721.81.13
114M0.0338711.21.414
116M0.0529725.91.918
117M0.025424.71.27
118F0.023963.61.26
119M0.0487422.71.817
120M0.027976.71.29
121F0.0493423.11.816
123F0.0335110.91.411
124M0.031229.21.39
125F0.0450819.81.715
126M0.025184.51.27
127M0.022662.61.15
128M0.0479622.11.716
138F0.027926.61.28
139M0.0324010.11.310
140M0.0460420.61.718
141F0.030538.61.39
142M0.031589.41.38
143M0.0495723.31.824
144M0.0463620.81.717
145F0.023223.01.16
146M0.030818.81.37