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The endocrine disruptor 17β-trenbolone alters the relationship between pre- and post-copulatory sexual traits in male mosquitofish (Gambusia holbrooki)

Tan, Hung and Bertram, Michael and Martin, Jake M. and Ecker, Tiarne E. and Hannington, Stephanie L. and Saaristo, Minna and O’Bryan, Moira K. and Wong, Bob B.M. (2021). The endocrine disruptor 17β-trenbolone alters the relationship between pre- and post-copulatory sexual traits in male mosquitofish (Gambusia holbrooki). Science of the Total Environment. 790 , 148028
[Research article]

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Abstract

It is now well-established that reproduction in wildlife can be disrupted by anthropogenic environmental changes, such as chemical pollution. However, very little is known about how these pollutants might affect the interplay between pre- and post-copulatory mechanisms of sexual selection. Here, we investigated the impacts of 21-day exposure of male eastern mosquitofish (Gambusia holbrooki) to a field-realistic level (average measured concentration: 11 ng/L) of the endocrine-disrupting chemical 17β-trenbolone (17β-TB) on pre- and post-copulatory reproductive traits. We examined male reproductive behaviour by testing the time spent near a female behind a partition, as well as the number of copulation attempts made, and the time spent chasing a female in a free-swimming context. Sperm traits were also assayed for all males. We found that exposure of male fish to 17β-TB altered the relationship between key pre- and post-copulatory reproductive traits. Furthermore, 17β-TB-exposed males had, on average, a higher percentage of motile sperm, and performed fewer copulation attempts than unexposed males. However, there was no overall effect of 17β-TB exposure on either the time males spent associating with or chasing females. Taken together, our findings demonstrate the potential for chemical pollutants to affect both pre- and post-copulatory sexual traits, and the interplay between these mechanisms of sexual selection in contaminated wildlife.

Authors/Creators:Tan, Hung and Bertram, Michael and Martin, Jake M. and Ecker, Tiarne E. and Hannington, Stephanie L. and Saaristo, Minna and O’Bryan, Moira K. and Wong, Bob B.M.
Title:The endocrine disruptor 17β-trenbolone alters the relationship between pre- and post-copulatory sexual traits in male mosquitofish (Gambusia holbrooki)
Series Name/Journal:Science of the Total Environment
Year of publishing :2021
Volume:790
Article number:148028
Number of Pages:9
ISSN:0048-9697
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
Keywords:Androgen, Behavioural ecotoxicology, Endocrine-disrupting chemical, Hormonal growth promotant, Sperm, Trenbolone
URN:NBN:urn:nbn:se:slu:epsilon-p-112361
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-112361
Additional ID:
Type of IDID
DOI10.1016/j.scitotenv.2021.148028
ID Code:24572
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Wildlife, Fish and Environmental Studies
Deposited By: SLUpub Connector
Deposited On:21 Jun 2021 11:03
Metadata Last Modified:21 Jun 2021 11:11

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