<address id="lxrbh"></address>
      <em id="lxrbh"><span id="lxrbh"></span></em>

      ScienceDaily
      Your source for the latest research news
      Follow Facebook Twitter LinkedIn Subscribe RSS Feeds Newsletters
      New:
      • New Physics and the Early Universe
      • How SARS-CoV-2 Rapidly Damages Human Lung Cells
      • Greenland Ice Sheet Faces Irreversible Melting
      • Early Changes in Alzheimer’s Before Symptoms
      • Fingerprints Strengthen Human Touch
      • Is It Better to Give Than Receive?
      • New Hubble Data Explains Missing Dark Matter
      • What Triggers Leaf Die-Off in Autumn?
      • Alligators Can Regrow Their Tails Too
      • Two Liquid States of Water Exist
      advertisement
      Follow all of ScienceDaily's latest research news and top science headlines!
      Science News
      from research organizations

      1

      2

      Fish exposed to even small amounts of estrogen produce fewer males

      Date:
      October 23, 2020
      Source:
      University of Cincinnati
      Summary:
      A biologist conducted experiments with North American freshwater fish called least killifish. She found that fish exposed to estrogen in concentrations of 5 nanograms per liter in controlled lab conditions had fewer males and produced fewer offspring. Scientists have found estrogen at as much as 16 times that concentration in streams adjacent to sewage treatment plants.
      Share:
      FULL STORY

      Water tainted with even a small concentration of human hormones can have profound effects on fish, according to a University of Cincinnati biologist.

      advertisement

      UC assistant professor Latonya Jackson conducted experiments with North American freshwater fish called least killifish. She found that fish exposed to estrogen in concentrations of 5 nanograms per liter in controlled lab conditions had fewer males and produced fewer offspring.

      Scientists have found estrogen at as much as 16 times that concentration in streams adjacent to sewage treatment plants.

      The study suggests that even this small dose of estrogen could have significant consequences for wild fish populations living downstream from sewage treatment plants.

      The study was published this week in the journal Aquatic Toxicology.

      What's special about least killifish is they have a placenta and give birth to live young, Jackson said. It's uncommon among fish, who more typically lay eggs.

      advertisement

      Jackson studied a synthetic estrogen called 17α-ethinylestradiol, an active ingredient in oral contraceptives also used in hormone replacement therapy. Estrogen been found in streams adjacent to sewage treatment plants in concentrations of as high as 60 nanograms or more per liter.

      "Anything you flush down the toilet or put in the sink will get in the water supply," she said.

      This includes not only medicine people flush (never do that) but also unmetabolized chemicals that get flushed when people use the bathroom.

      "Our wastewater treatment systems are good at removing a lot of things, but they weren't designed to remove pharmaceuticals," Jackson said. "So when women on birth control or hormone therapy go to the bathroom, it gets flushed into wastewater treatment plants."

      Chronic exposure of fish to estrogen led to smaller populations and a gender ratio imbalance with more females than males.

      Now Jackson wants to know how the exposure to hormones such as estrogen and androgen in a female fish affects her offspring. She is collaborating with the U.S. Environmental Protection Agency to examine local waters in southwestern Ohio.

      Jackson said the impacts on streams are not limited to fish. Hormones and other chemicals that are not removed during treatment can bioaccumulate in the food chain or end up in our drinking water.

      "Our drinking water is not a renewable resource. When we run out of clean drinking water, it's gone," Jackson said. "It's very important that we keep this resource clean."

      make a difference: sponsored opportunity

      Story Source:

      Materials provided by University of Cincinnati. Original written by Michael Miller. Note: Content may be edited for style and length.


      Journal Reference:

      1. Latonya Jackson, Paul Klerks. Effects of the Synthetic Estrogen 17α-ethinylestradiol on Heterandria Formosa Populations: Does matrotrophy circumvent population collapse? Aquatic Toxicology, 2020; 105659 DOI: 10.1016/j.aquatox.2020.105659

      Cite This Page:

      • MLA
      • APA
      • Chicago
      University of Cincinnati. "Fish exposed to even small amounts of estrogen produce fewer males." ScienceDaily. ScienceDaily, 23 October 2020. <www.theclynefaction.com/releases/2020/10/201023123100.htm>.
      University of Cincinnati. (2020, October 23). Fish exposed to even small amounts of estrogen produce fewer males. ScienceDaily. Retrieved December 3, 2020 from www.theclynefaction.com/releases/2020/10/201023123100.htm
      University of Cincinnati. "Fish exposed to even small amounts of estrogen produce fewer males." ScienceDaily. www.theclynefaction.com/releases/2020/10/201023123100.htm (accessed December 3, 2020).

      • RELATED TOPICS
        • Plants & Animals
          • Fish
          • Fisheries
          • Wild Animals
          • Marine Biology
        • Earth & Climate
          • Recycling and Waste
          • Water
          • Hazardous Waste
          • Pollution
      advertisement

      • RELATED TERMS
        • Trout
        • Neon tetra
        • American Mink
        • Catfish
        • Pufferfish
        • Fish
        • Haddock
        • Narwhal

      1

      2

      3

      4

      5
      RELATED STORIES

      Medicine and Personal Care Products May Lead to New Pollutants in Waterways
      Mar. 21, 2019 — When you flush the toilet, you probably don't think about the traces of the medicine and personal care products in your body that are winding up in sewage treatment plants, streams, rivers, lakes, ...
      African Killifish Becomes Fastest Maturing Vertebrate on Record
      Aug. 6, 2018 — For most of the year, annual killifish persist as diapausing embryos buried in sediments across the African savannah. When rainwater fills small depressions across the landscape, the fish must hatch, ...
      Coal Ash Selenium Found in Fish in North Carolina Lakes
      Feb. 7, 2017 — High levels of selenium have been found in the tissues of fish in North Carolina lakes that receive coal ash effluents from power plants. Concentrations of selenium exceeding EPA-recommended ...
      Inbreeding Impacts on Mothering Ability, Red Deer Study Shows
      Mar. 14, 2016 — Inbred animals have fewer surviving offspring compared with others, a study of red deer in the wild has found. The findings from a long-term study on a Scottish island shows that hinds whose parents ...
      FROM AROUND THE WEB

      ScienceDaily shares links with sites in the TrendMD network and earns revenue from third-party advertisers, where indicated.
        Print   Email   Share

      advertisement

      1

      2

      3

      4

      5
      Most Popular
      this week

      PLANTS & ANIMALS
      (c) (c) SailingAway / AdobeNot Just Lizards: Alligators Can Regrow Their Tails Too, New Study Reveals
      Connection Between Gut Bacteria and Vitamin D Levels
      (c) (c) tampatra / AdobeA Biochemical Random Number
      EARTH & CLIMATE
      (c) (c) CrispyMedia / AdobeTree Rings May Hold Clues to Impacts of Distant Supernovas on Earth
      (c) (c) EvgeniyQW / AdobeClimate Change Causes Landfalling Hurricanes to Stay Stronger for Longer
      New Species Described in 2020
      FOSSILS & RUINS
      Boy or Girl? It's in the Father's Genes
      Ancient Blanket Made With 11,500 Turkey Feathers
      Blue-Eyed Humans Have a Single, Common Ancestor
      advertisement

      Strange & Offbeat
       

      PLANTS & ANIMALS
      Researchers Discover Life in Deep Ocean Sediments at or Above Water's Boiling Point
      Restoring a Rudimentary Form of Vision in the Blind
      Octogenarian Snapper Found Off Australia Becomes Oldest Tropical Reef Fish by Two Decades
      EARTH & CLIMATE
      Researchers Discover Life in Deep Ocean Sediments at or Above Water's Boiling Point
      Cluster of Alaskan Islands Could Be Single, Interconnected Giant Volcano
      Largest Aggregation of Fishes in Abyssal Deep Sea
      FOSSILS & RUINS
      Ancient Blanket Made With 11,500 Turkey Feathers
      T. Rex Had Huge Growth Spurts, but Other Dinos Grew Slow and Steady
      Prehistoric Shark Hid Its Largest Teeth
      SD
      • SD
        • Home Page
        • Top Science News
        • Latest News
      • Home
        • Home Page
        • Top Science News
        • Latest News
      • Health
        • View all the latest top news in the health sciences,
          or browse the topics below:
          Health & Medicine
          • Allergy
          • Alternative Medicine
          • Birth Control
          • Cancer
          • Diabetes
          • Diseases
          • Heart Disease
          • HIV and AIDS
          • Obesity
          • Stem Cells
          • ... more topics
          Mind & Brain
          • ADD and ADHD
          • Addiction
          • Alzheimer's
          • Autism
          • Depression
          • Headaches
          • Intelligence
          • Psychology
          • Relationships
          • Schizophrenia
          • ... more topics
          Living Well
          • Parenting
          • Pregnancy
          • Sexual Health
          • Skin Care
          • Men's Health
          • Women's Health
          • Nutrition
          • Diet and Weight Loss
          • Fitness
          • Healthy Aging
          • ... more topics
      • Tech
        • View all the latest top news in the physical sciences & technology,
          or browse the topics below:
          Matter & Energy
          • Aviation
          • Chemistry
          • Electronics
          • Fossil Fuels
          • Nanotechnology
          • Physics
          • Quantum Physics
          • Solar Energy
          • Technology
          • Wind Energy
          • ... more topics
          Space & Time
          • Astronomy
          • Black Holes
          • Dark Matter
          • Extrasolar Planets
          • Mars
          • Moon
          • Solar System
          • Space Telescopes
          • Stars
          • Sun
          • ... more topics
          Computers & Math
          • Artificial Intelligence
          • Communications
          • Computer Science
          • Hacking
          • Mathematics
          • Quantum Computers
          • Robotics
          • Software
          • Video Games
          • Virtual Reality
          • ... more topics
      • Enviro
        • View all the latest top news in the environmental sciences,
          or browse the topics below:
          Plants & Animals
          • Agriculture and Food
          • Animals
          • Biology
          • Biotechnology
          • Endangered Animals
          • Extinction
          • Genetically Modified
          • Microbes and More
          • New Species
          • Zoology
          • ... more topics
          Earth & Climate
          • Climate
          • Earthquakes
          • Environment
          • Geography
          • Geology
          • Global Warming
          • Hurricanes
          • Ozone Holes
          • Pollution
          • Weather
          • ... more topics
          Fossils & Ruins
          • Ancient Civilizations
          • Anthropology
          • Archaeology
          • Dinosaurs
          • Early Humans
          • Early Mammals
          • Evolution
          • Lost Treasures
          • Origin of Life
          • Paleontology
          • ... more topics
      • Society
        • View all the latest top news in the social sciences & education,
          or browse the topics below:
          Science & Society
          • Arts & Culture
          • Consumerism
          • Economics
          • Political Science
          • Privacy Issues
          • Public Health
          • Racial Disparity
          • Religion
          • Sports
          • World Development
          • ... more topics
          Business & Industry
          • Biotechnology & Bioengineering
          • Computers & Internet
          • Energy & Resources
          • Engineering
          • Medical Technology
          • Pharmaceuticals
          • Transportation
          • ... more topics
          Education & Learning
          • Animal Learning & Intelligence
          • Creativity
          • Educational Psychology
          • Educational Technology
          • Infant & Preschool Learning
          • Learning Disorders
          • STEM Education
          • ... more topics
      • Quirky
        • Top News
        • Human Quirks
        • Odd Creatures
        • Bizarre Things
        • Weird World
      Free Subscriptions

      Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

      • Email Newsletters
      • RSS Feeds
      Follow Us

      Keep up to date with the latest news from ScienceDaily via social networks:

      • Facebook
      • Twitter
      • LinkedIn
      Have Feedback?

      Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?

      • Leave Feedback
      • Contact Us
      About This Site  |  Staff  |  Reviews  |  Contribute  |  Advertise  |  Privacy Policy  |  Editorial Policy  |  Terms of Use
      Copyright 2020 ScienceDaily or by other parties, where indicated. All rights controlled by their respective owners.
      Content on this website is for information only. It is not intended to provide medical or other professional advice.
      Views expressed here do not necessarily reflect those of ScienceDaily, its staff, its contributors, or its partners.
      Financial support for ScienceDaily comes from advertisements and referral programs, where indicated.
      — CCPA: Do Not Sell My Information — — GDPR: Privacy Settings —
      118论坛 118网址之家