(Table 1) Cortisol concentration in hair of East Greenland polar bears (Ursus maritimus)
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2011
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| _version_ | 1867171813379801088 |
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| author | Bechshøft, Thea Ø Sonne, Christian Dietz, Rune Born, Erik W Novak, M A Henchey, E Meyer, J S |
| author_facet | Bechshøft, Thea Ø Sonne, Christian Dietz, Rune Born, Erik W Novak, M A Henchey, E Meyer, J S |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | To demonstrate the ability to assess long-term hypothalamic-pituitary-adrenocortical (HPA) axis activity in polar bears (Ursus maritimus), a pilot study was conducted in which cortisol concentration was analyzed in hair from 7 female (3-19 years) and 10 male (6-19 years) East Greenland polar bears sampled in 1994-2006. The hair was chosen as matrix as it is non-invasive, seasonally harmonized, and has been validated as an index of long-term changes in cortisol levels. The samples were categorized according to contamination: eight were clean (2 females, 6 males), 5 had been contaminated with bear blood (2 F, 3 M), and 4 with bear fat (3 F, 1 M). There was no significant difference in cortisol concentration between the three categories after external contamination was removed. However, contaminated hair samples should be cleaned before cortisol determination. Average hair cortisol concentration was 8.90 pg/mg (range: 5.5 to 16.4 pg/mg). There was no significant correlation between cortisol concentration and age (p = 0.81) or sampling year (p = 0.11). However, females had higher mean cortisol concentration than males (females mean: 11.0 pg/mg, males: 7.3 pg/mg; p = 0.01). The study showed that polar bear hair contains measurable amounts of cortisol and that cortisol in hair may be used in studies of long-term stress in polar bears. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_807316 |
| institution | PANGAEA |
| language | en |
| publishDate | 2011 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Cortisol concentration in hair of East Greenland polar bears (Ursus maritimus) Bechshøft, Thea Ø Sonne, Christian Dietz, Rune Born, Erik W Novak, M A Henchey, E Meyer, J S Age, relative, number of years; Cortisol; East_Greenland; East Greenland; International Polar Year (2007-2008); IPY; Sampling date; Sex; Status To demonstrate the ability to assess long-term hypothalamic-pituitary-adrenocortical (HPA) axis activity in polar bears (Ursus maritimus), a pilot study was conducted in which cortisol concentration was analyzed in hair from 7 female (3-19 years) and 10 male (6-19 years) East Greenland polar bears sampled in 1994-2006. The hair was chosen as matrix as it is non-invasive, seasonally harmonized, and has been validated as an index of long-term changes in cortisol levels. The samples were categorized according to contamination: eight were clean (2 females, 6 males), 5 had been contaminated with bear blood (2 F, 3 M), and 4 with bear fat (3 F, 1 M). There was no significant difference in cortisol concentration between the three categories after external contamination was removed. However, contaminated hair samples should be cleaned before cortisol determination. Average hair cortisol concentration was 8.90 pg/mg (range: 5.5 to 16.4 pg/mg). There was no significant correlation between cortisol concentration and age (p = 0.81) or sampling year (p = 0.11). However, females had higher mean cortisol concentration than males (females mean: 11.0 pg/mg, males: 7.3 pg/mg; p = 0.01). The study showed that polar bear hair contains measurable amounts of cortisol and that cortisol in hair may be used in studies of long-term stress in polar bears. |
| title | (Table 1) Cortisol concentration in hair of East Greenland polar bears (Ursus maritimus) |
| topic | Age, relative, number of years; Cortisol; East_Greenland; East Greenland; International Polar Year (2007-2008); IPY; Sampling date; Sex; Status |
| url | https://doi.org/10.1594/PANGAEA.807316 |