(Table 1) Diving behaviour of male Adélie penguins (Pygoscelis adeliae) with and without corticosterone implants at Pointe Géologie
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2011
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| _version_ | 1867171814298353664 |
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| author | Cottin, Manuelle Kato, Akiko Thierry, Anne-Mathilde Le Maho, Yvon Raclot, Thierry Ropert-Coudert, Yan |
| author_facet | Cottin, Manuelle Kato, Akiko Thierry, Anne-Mathilde Le Maho, Yvon Raclot, Thierry Ropert-Coudert, Yan |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The amount of energy that organisms can allocate to self-maintenance and/or reproduction largely depends on their foraging strategies. Because of corticosterone (CORT) involvement in the control of energy metabolism, food intake and locomotor activity, recent studies have sought to demonstrate the role of this hormone in foraging decisions and performance. Moreover, considerable recent advances in animal-attached loggers now allow the study of behaviour in free-living animals. In order to assess the effects of CORT administration on the foraging behaviour of free-living Adelie Penguins Pygoscelis adeliae, we studied a group with CORT implants and a control group without CORT implants, by attaching time-depth recorders to the two groups and monitoring them throughout up to seven consecutive foraging trips during the guard stage (in Adelie Land, Antarctica). We found that foraging trips duration was similar between both groups. Dive durations, time spent at the bottom phase of dives, and the number of undulations per dive of CORT-implanted birds were all significantly higher than those of controls. However, CORT-implanted birds performed fewer dives overall (ca. 4,400) than controls (ca. 6,250) and spent many (13 and 6 times for penguins #3 and #4, respectively) long periods (>3 h) without diving. The low foraging effort and long resting periods support the view that CORT-implanted birds probably gained less energy than did the control birds. CORT treatment appears then to result in redirecting bird behaviour from costly activity (i.e. reproduction) to a behaviour promoting the preservation of energy reserves. Future studies are therefore needed to assess body condition and reproductive success of CORT-manipulated birds in parallel with the recording of their diving performances. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_808549 |
| institution | PANGAEA |
| language | en |
| publishDate | 2011 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Diving behaviour of male Adélie penguins (Pygoscelis adeliae) with and without corticosterone implants at Pointe Géologie Cottin, Manuelle Kato, Akiko Thierry, Anne-Mathilde Le Maho, Yvon Raclot, Thierry Ropert-Coudert, Yan Adelie Land; BIO; Biology; Calculated after Gentry & Kooyman (1986); Duration, number of days; Identification; International Polar Year (2007-2008); IPY; Number; Number of dives per trip; Pointe_Géologie; Proportion of time; Proportion of time, standard error; Pygoscelis adeliae, dive depth maximum; Pygoscelis adeliae, standard deviation; Standard deviation; Time-depth recorder, Cefas Technology (Cefas G5); Time in seconds; Treatment The amount of energy that organisms can allocate to self-maintenance and/or reproduction largely depends on their foraging strategies. Because of corticosterone (CORT) involvement in the control of energy metabolism, food intake and locomotor activity, recent studies have sought to demonstrate the role of this hormone in foraging decisions and performance. Moreover, considerable recent advances in animal-attached loggers now allow the study of behaviour in free-living animals. In order to assess the effects of CORT administration on the foraging behaviour of free-living Adelie Penguins Pygoscelis adeliae, we studied a group with CORT implants and a control group without CORT implants, by attaching time-depth recorders to the two groups and monitoring them throughout up to seven consecutive foraging trips during the guard stage (in Adelie Land, Antarctica). We found that foraging trips duration was similar between both groups. Dive durations, time spent at the bottom phase of dives, and the number of undulations per dive of CORT-implanted birds were all significantly higher than those of controls. However, CORT-implanted birds performed fewer dives overall (ca. 4,400) than controls (ca. 6,250) and spent many (13 and 6 times for penguins #3 and #4, respectively) long periods (>3 h) without diving. The low foraging effort and long resting periods support the view that CORT-implanted birds probably gained less energy than did the control birds. CORT treatment appears then to result in redirecting bird behaviour from costly activity (i.e. reproduction) to a behaviour promoting the preservation of energy reserves. Future studies are therefore needed to assess body condition and reproductive success of CORT-manipulated birds in parallel with the recording of their diving performances. |
| title | (Table 1) Diving behaviour of male Adélie penguins (Pygoscelis adeliae) with and without corticosterone implants at Pointe Géologie |
| topic | Adelie Land; BIO; Biology; Calculated after Gentry & Kooyman (1986); Duration, number of days; Identification; International Polar Year (2007-2008); IPY; Number; Number of dives per trip; Pointe_Géologie; Proportion of time; Proportion of time, standard error; Pygoscelis adeliae, dive depth maximum; Pygoscelis adeliae, standard deviation; Standard deviation; Time-depth recorder, Cefas Technology (Cefas G5); Time in seconds; Treatment |
| url | https://doi.org/10.1594/PANGAEA.808549 |