Interspecific comparison of estrogen and testosterone concentrations in three species of amphipods (gammarus duebeni celticus, G. pseudolimnaeus, and G. pulex)

S Lewis, J Freund, G Riddell, J Wankowski, J Dick, M Baldridge

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The presence and biological significance of vertebrate-related steroid sex hormones in aquatic invertebrates are poorly understood. We compared the concentrations of estrogen (17β-estradiol) and testosterone between amplexing male and female freshwater amphipods of three species from two continents: Gammarus duebeni celticusLiljeborg, 1852 and G. pulex(L., 1758) from Europe, and G. pseudolimnaeusBousfield, 1958 from North America. All three species were found to have measureable concentrations of both hormones in whole body lysate samples but the concentrations differed between species, with testosterone differing significantly between species only for male amphipods and estradiol differing significantly between species only for female amphipods. Concentrations of both testosterone and estrogen differed between males and females in two of the three species ( G. duebeni celticusand G. pseudolimnaeus). Females had the highest concentration of both hormones in G. duebeni celticusand the lowest concentration of both hormones in G. pseudolimnaeus. These results contribute to a growing body of evidence that these hormones are endogenously produced and biologically relevant in amphipods. Such evidence is particularly important in light of increasing prevalence of endocrine-disrupting compounds in the environment and the central role played by amphipods in aquatic ecosystems.
Original languageEnglish
Pages (from-to)789-792
Number of pages4
JournalJournal of Crustacean Biology
Volume35
Issue number6
DOIs
Publication statusPublished - 1 Nov 2015
Externally publishedYes

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Pulex
Gammarus
testosterone
amphipod
Amphipoda
estrogens
hormone
hormones
estradiol
Gammarus pulex
endocrine-disrupting chemicals
aquatic invertebrates
sex hormones
sex hormone
steroid hormones
steroid
aquatic ecosystem
vertebrates
comparison
vertebrate

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@article{d5b8c64ffdce48c29c0e180c5c9ac89e,
title = "Interspecific comparison of estrogen and testosterone concentrations in three species of amphipods (gammarus duebeni celticus, G. pseudolimnaeus, and G. pulex)",
abstract = "The presence and biological significance of vertebrate-related steroid sex hormones in aquatic invertebrates are poorly understood. We compared the concentrations of estrogen (17β-estradiol) and testosterone between amplexing male and female freshwater amphipods of three species from two continents: Gammarus duebeni celticusLiljeborg, 1852 and G. pulex(L., 1758) from Europe, and G. pseudolimnaeusBousfield, 1958 from North America. All three species were found to have measureable concentrations of both hormones in whole body lysate samples but the concentrations differed between species, with testosterone differing significantly between species only for male amphipods and estradiol differing significantly between species only for female amphipods. Concentrations of both testosterone and estrogen differed between males and females in two of the three species ( G. duebeni celticusand G. pseudolimnaeus). Females had the highest concentration of both hormones in G. duebeni celticusand the lowest concentration of both hormones in G. pseudolimnaeus. These results contribute to a growing body of evidence that these hormones are endogenously produced and biologically relevant in amphipods. Such evidence is particularly important in light of increasing prevalence of endocrine-disrupting compounds in the environment and the central role played by amphipods in aquatic ecosystems.",
author = "S Lewis and J Freund and G Riddell and J Wankowski and J Dick and M Baldridge",
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language = "English",
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Interspecific comparison of estrogen and testosterone concentrations in three species of amphipods (gammarus duebeni celticus, G. pseudolimnaeus, and G. pulex). / Lewis, S; Freund, J; Riddell, G; Wankowski, J; Dick, J; Baldridge, M.

In: Journal of Crustacean Biology, Vol. 35, No. 6, 01.11.2015, p. 789-792.

Research output: Contribution to journalArticleResearchpeer-review

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