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Collective action reduces androgen responsiveness with implications for shoaling dynamics in stickleback fish
Hormones and Behavior, Volume: 119, Start page: 104636
Swansea University Authors: Ines Fuertbauer , Rowan Brown
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DOI (Published version): 10.1016/j.yhbeh.2019.104636
Abstract
Androgens, traditionally viewed as hormones that regulate secondary sexual characteristics and reproduction in male vertebrates, are often modulated by social stimuli. High levels of the ‘social hormone’ testosterone (T) are linked to aggression, dominance, and competition. Low T levels, in contrast...
Published in: | Hormones and Behavior |
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ISSN: | 0018-506X |
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Elsevier BV
2020
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URI: | https://cronfa.swan.ac.uk/Record/cronfa52635 |
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2023-03-13T09:50:06.9672884 v2 52635 2019-11-04 Collective action reduces androgen responsiveness with implications for shoaling dynamics in stickleback fish f682ec95fa97c4fabb57dc098a9fdaaa 0000-0003-1404-6280 Ines Fuertbauer Ines Fuertbauer true false d7db8d42c476dfa69c15ce06d29bd863 0000-0003-3628-2524 Rowan Brown Rowan Brown true false 2019-11-04 SBI Androgens, traditionally viewed as hormones that regulate secondary sexual characteristics and reproduction in male vertebrates, are often modulated by social stimuli. High levels of the ‘social hormone’ testosterone (T) are linked to aggression, dominance, and competition. Low T levels, in contrast, promote sociopositive behaviours such as affiliation, social tolerance, and cooperation, which can be crucial for group-level, collective behaviours. Here, we test the hypothesis that - in a collective context - low T levels should be favourable, using non-reproductive male and female stickleback fish (Gasterosteus aculeatus) and non-invasive waterborne hormone analysis. In line with our predictions, we show that the fishes' T levels were significantly lower during shoaling compared to when alone, with high-T individuals showing the largest decrease. Ruling out stress-induced T suppression and increased T conversion into oestradiol, we find evidence that shoaling directly affects androgen responsiveness. We also show that groups characterized by lower mean T exhibit less hierarchical leader-follower dynamics, suggesting that low T promotes egalitarianism. Overall, we show that collective action results in lower T levels, which may serve to promote coordination and group performance. Our study, together with recent complementary findings in humans, emphasizes the importance of low T for the expression of sociopositive behaviour across vertebrates, suggesting similarities in endocrine mechanisms. Journal Article Hormones and Behavior 119 104636 Elsevier BV 0018-506X Collective hormone profiles, Social context, Social modulation, Social tolerance, Testosterone 1 3 2020 2020-03-01 10.1016/j.yhbeh.2019.104636 http://dx.doi.org/10.1016/j.yhbeh.2019.104636 COLLEGE NANME Biosciences COLLEGE CODE SBI Swansea University 2023-03-13T09:50:06.9672884 2019-11-04T08:02:53.6682387 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Ines Fuertbauer 0000-0003-1404-6280 1 Rowan Brown 0000-0003-3628-2524 2 Michael Heistermann 3 52635__15781__2717f04ea9674cdbaed5be68ec51e79a.pdf Fürtbauer et al., HB accepted manuscript.pdf 2019-11-04T08:08:14.5135955 Output 885305 application/pdf Accepted Manuscript true 2020-12-11T00:00:00.0000000 false |
title |
Collective action reduces androgen responsiveness with implications for shoaling dynamics in stickleback fish |
spellingShingle |
Collective action reduces androgen responsiveness with implications for shoaling dynamics in stickleback fish Ines Fuertbauer Rowan Brown |
title_short |
Collective action reduces androgen responsiveness with implications for shoaling dynamics in stickleback fish |
title_full |
Collective action reduces androgen responsiveness with implications for shoaling dynamics in stickleback fish |
title_fullStr |
Collective action reduces androgen responsiveness with implications for shoaling dynamics in stickleback fish |
title_full_unstemmed |
Collective action reduces androgen responsiveness with implications for shoaling dynamics in stickleback fish |
title_sort |
Collective action reduces androgen responsiveness with implications for shoaling dynamics in stickleback fish |
author_id_str_mv |
f682ec95fa97c4fabb57dc098a9fdaaa d7db8d42c476dfa69c15ce06d29bd863 |
author_id_fullname_str_mv |
f682ec95fa97c4fabb57dc098a9fdaaa_***_Ines Fuertbauer d7db8d42c476dfa69c15ce06d29bd863_***_Rowan Brown |
author |
Ines Fuertbauer Rowan Brown |
author2 |
Ines Fuertbauer Rowan Brown Michael Heistermann |
format |
Journal article |
container_title |
Hormones and Behavior |
container_volume |
119 |
container_start_page |
104636 |
publishDate |
2020 |
institution |
Swansea University |
issn |
0018-506X |
doi_str_mv |
10.1016/j.yhbeh.2019.104636 |
publisher |
Elsevier BV |
college_str |
Faculty of Science and Engineering |
hierarchytype |
|
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facultyofscienceandengineering |
hierarchy_top_title |
Faculty of Science and Engineering |
hierarchy_parent_id |
facultyofscienceandengineering |
hierarchy_parent_title |
Faculty of Science and Engineering |
department_str |
School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences |
url |
http://dx.doi.org/10.1016/j.yhbeh.2019.104636 |
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active_str |
0 |
description |
Androgens, traditionally viewed as hormones that regulate secondary sexual characteristics and reproduction in male vertebrates, are often modulated by social stimuli. High levels of the ‘social hormone’ testosterone (T) are linked to aggression, dominance, and competition. Low T levels, in contrast, promote sociopositive behaviours such as affiliation, social tolerance, and cooperation, which can be crucial for group-level, collective behaviours. Here, we test the hypothesis that - in a collective context - low T levels should be favourable, using non-reproductive male and female stickleback fish (Gasterosteus aculeatus) and non-invasive waterborne hormone analysis. In line with our predictions, we show that the fishes' T levels were significantly lower during shoaling compared to when alone, with high-T individuals showing the largest decrease. Ruling out stress-induced T suppression and increased T conversion into oestradiol, we find evidence that shoaling directly affects androgen responsiveness. We also show that groups characterized by lower mean T exhibit less hierarchical leader-follower dynamics, suggesting that low T promotes egalitarianism. Overall, we show that collective action results in lower T levels, which may serve to promote coordination and group performance. Our study, together with recent complementary findings in humans, emphasizes the importance of low T for the expression of sociopositive behaviour across vertebrates, suggesting similarities in endocrine mechanisms. |
published_date |
2020-03-01T04:05:07Z |
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1763753388580798464 |
score |
11.030209 |