Cargando…
Sexual phenotype drives variation in endocrine responses to social challenge in a quasi-clonal animal
In many species, males tend to behave more aggressively than females and female aggression often occurs during particular life stages such as maternal defence of offspring. Though many studies have revealed differences in aggression between the sexes, few studies have compared the sexes in terms of...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society Publishing
2018
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5936956/ https://www.ncbi.nlm.nih.gov/pubmed/29765691 http://dx.doi.org/10.1098/rsos.180002 |
_version_ | 1783320548253630464 |
---|---|
author | Li, Cheng-Yu Huang, Shu-Ping Garcia, Mark Fuller, Adam Hsu, Yuying Earley, Ryan L. |
author_facet | Li, Cheng-Yu Huang, Shu-Ping Garcia, Mark Fuller, Adam Hsu, Yuying Earley, Ryan L. |
author_sort | Li, Cheng-Yu |
collection | PubMed |
description | In many species, males tend to behave more aggressively than females and female aggression often occurs during particular life stages such as maternal defence of offspring. Though many studies have revealed differences in aggression between the sexes, few studies have compared the sexes in terms of their neuroendocrine responses to contest experience. We investigated sex differences in the endocrine response to social challenge using mangrove rivulus fish, Kryptolebias marmoratus. In this species, sex is determined environmentally, allowing us to produce males and hermaphrodites with identical genotypes. We hypothesized that males would show elevated androgen levels (testosterone and 11-ketotestosterone) following social challenge but that hermaphrodite responses might be constrained by having to maintain both testicular and ovarian tissue. To test this hypothesis, we staged fights between males and between hermaphrodites, and then compared contest behaviour and hormone responses between the sexes. Hermaphrodites had significantly higher oestradiol but lower 11-ketotestosterone than males before contests. Males took longer to initiate contests but tended to fight more aggressively and sustain longer fights than hermaphrodites. Males showed a dramatic post-fight increase in 11-ketotestosterone but hermaphrodites did not. Thus, despite being genetically identical, males and hermaphrodites exhibit dramatically different fighting strategies and endocrine responses to contests. |
format | Online Article Text |
id | pubmed-5936956 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | The Royal Society Publishing |
record_format | MEDLINE/PubMed |
spelling | pubmed-59369562018-05-15 Sexual phenotype drives variation in endocrine responses to social challenge in a quasi-clonal animal Li, Cheng-Yu Huang, Shu-Ping Garcia, Mark Fuller, Adam Hsu, Yuying Earley, Ryan L. R Soc Open Sci Biology (Whole Organism) In many species, males tend to behave more aggressively than females and female aggression often occurs during particular life stages such as maternal defence of offspring. Though many studies have revealed differences in aggression between the sexes, few studies have compared the sexes in terms of their neuroendocrine responses to contest experience. We investigated sex differences in the endocrine response to social challenge using mangrove rivulus fish, Kryptolebias marmoratus. In this species, sex is determined environmentally, allowing us to produce males and hermaphrodites with identical genotypes. We hypothesized that males would show elevated androgen levels (testosterone and 11-ketotestosterone) following social challenge but that hermaphrodite responses might be constrained by having to maintain both testicular and ovarian tissue. To test this hypothesis, we staged fights between males and between hermaphrodites, and then compared contest behaviour and hormone responses between the sexes. Hermaphrodites had significantly higher oestradiol but lower 11-ketotestosterone than males before contests. Males took longer to initiate contests but tended to fight more aggressively and sustain longer fights than hermaphrodites. Males showed a dramatic post-fight increase in 11-ketotestosterone but hermaphrodites did not. Thus, despite being genetically identical, males and hermaphrodites exhibit dramatically different fighting strategies and endocrine responses to contests. The Royal Society Publishing 2018-04-04 /pmc/articles/PMC5936956/ /pubmed/29765691 http://dx.doi.org/10.1098/rsos.180002 Text en © 2018 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Biology (Whole Organism) Li, Cheng-Yu Huang, Shu-Ping Garcia, Mark Fuller, Adam Hsu, Yuying Earley, Ryan L. Sexual phenotype drives variation in endocrine responses to social challenge in a quasi-clonal animal |
title | Sexual phenotype drives variation in endocrine responses to social challenge in a quasi-clonal animal |
title_full | Sexual phenotype drives variation in endocrine responses to social challenge in a quasi-clonal animal |
title_fullStr | Sexual phenotype drives variation in endocrine responses to social challenge in a quasi-clonal animal |
title_full_unstemmed | Sexual phenotype drives variation in endocrine responses to social challenge in a quasi-clonal animal |
title_short | Sexual phenotype drives variation in endocrine responses to social challenge in a quasi-clonal animal |
title_sort | sexual phenotype drives variation in endocrine responses to social challenge in a quasi-clonal animal |
topic | Biology (Whole Organism) |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5936956/ https://www.ncbi.nlm.nih.gov/pubmed/29765691 http://dx.doi.org/10.1098/rsos.180002 |
work_keys_str_mv | AT lichengyu sexualphenotypedrivesvariationinendocrineresponsestosocialchallengeinaquasiclonalanimal AT huangshuping sexualphenotypedrivesvariationinendocrineresponsestosocialchallengeinaquasiclonalanimal AT garciamark sexualphenotypedrivesvariationinendocrineresponsestosocialchallengeinaquasiclonalanimal AT fulleradam sexualphenotypedrivesvariationinendocrineresponsestosocialchallengeinaquasiclonalanimal AT hsuyuying sexualphenotypedrivesvariationinendocrineresponsestosocialchallengeinaquasiclonalanimal AT earleyryanl sexualphenotypedrivesvariationinendocrineresponsestosocialchallengeinaquasiclonalanimal |