Effects of the synthetic estrogen 17α-ethinylestradiol on Heterandria formosa populations : Does matrotrophy circumvent population collapse?

Copyright © 2020 Elsevier B.V. All rights reserved..

Feminization responses have been observed in some wild populations of fish living in rivers and streams, some of which have been shown to arise as a consequence of exposure to sewage treatment (STP) effluent discharges and the endocrine disrupting chemicals (EDCs) they contain which mimic or antagonize the actions of steroid hormones. The synthetic estrogen, 17α-ethinylestradiol (EE2), commonly used in oral contraceptives, is present in surface waters receiving STP effluents at concentrations ranging from non-detectable to 5 ng/L. Despite extensive evidence that EE2 negatively affects the reproductive health of fishes, relatively little is known about effects at the population level - and especially so for live-bearing fishes. To investigate the potential for such impacts, populations of the least killifish (Heterandria formosa) were exposed to 0 or 5 ng/L EE2. Exposures were started with newborn fish and continued for seven months. Chronic exposure to 5 ng/L EE2 caused significant reductions in population size, in abundances of newborns and males, and in population growth rates. The exposure also resulted in a female-biased sex ratio. However, individuals' survival rates were not affected. This study showed that chronic exposure to 5 ng/L EE2 negatively affected population dynamics in a live-bearing fish, demonstrating that the levels of EE2 detected near STPs have the potential to impact wild populations of these fish.

Medienart:

E-Artikel

Erscheinungsjahr:

2020

Erschienen:

2020

Enthalten in:

Zur Gesamtaufnahme - volume:229

Enthalten in:

Aquatic toxicology (Amsterdam, Netherlands) - 229(2020) vom: 01. Dez., Seite 105659

Sprache:

Englisch

Beteiligte Personen:

Jackson, Latonya [VerfasserIn]
Klerks, Paul [VerfasserIn]

Links:

Volltext

Themen:

17α-ethinylestradiol (EE(2))
423D2T571U
Aquatic toxicology
Endocrine disruption
Estrogens
Ethinyl Estradiol
Fish
Fish populations
Journal Article
Water Pollutants, Chemical

Anmerkungen:

Date Completed 04.12.2020

Date Revised 14.12.2020

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.aquatox.2020.105659

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM316989029