{"id":17218,"date":"2016-01-04T00:00:56","date_gmt":"2016-01-04T04:00:56","guid":{"rendered":"http:\/\/beyondpesticides.org\/dailynewsblog\/?p=17218"},"modified":"2016-01-04T12:34:01","modified_gmt":"2016-01-04T16:34:01","slug":"study-adds-to-evidence-of-endocrine-disrupting-chemicals-in-intersex-fish","status":"publish","type":"post","link":"https:\/\/beyondpesticides.org\/dailynewsblog\/2016\/01\/study-adds-to-evidence-of-endocrine-disrupting-chemicals-in-intersex-fish\/","title":{"rendered":"Study Adds to Evidence of Endocrine-Disrupting Chemicals in Intersex Fish"},"content":{"rendered":"<p><em>(Beyond Pesticides, January 4, 2016) <\/em>A <a href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0147651315301093\">study<\/a> published by the U.S. Geological Survey (USGS) and U.S. Fish and Wildlife Service (FWS) found large-scale evidence of intersex in smallmouth and largemouth bass in the Northeast United States, an indicator of endocrine disruption. The study, published in the journal <em>Ecotoxicology and Environmental Safety<\/em>, looks at 19 U.S. National Wildlife Refuges and is the first reconnaissance survey of this scope. The study found that the prevalence of testicular oocytes across all samples was 85% and 27% for male small- and largemouth bass, respectively.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-17223\" src=\"http:\/\/beyondpesticides.org\/dailynewsblog\/wp-content\/uploads\/2016\/01\/smallmouthbass.jpg\" alt=\"smallmouthbass\" width=\"376\" height=\"286\" align=\"right\" srcset=\"https:\/\/beyondpesticides.org\/dailynewsblog\/wp-content\/uploads\/2016\/01\/smallmouthbass.jpg 1280w, https:\/\/beyondpesticides.org\/dailynewsblog\/wp-content\/uploads\/2016\/01\/smallmouthbass-300x228.jpg 300w, https:\/\/beyondpesticides.org\/dailynewsblog\/wp-content\/uploads\/2016\/01\/smallmouthbass-768x584.jpg 768w, https:\/\/beyondpesticides.org\/dailynewsblog\/wp-content\/uploads\/2016\/01\/smallmouthbass-1024x779.jpg 1024w\" sizes=\"auto, (max-width: 376px) 100vw, 376px\" \/>Intersex occurs when one sex develops characteristics of the opposite sex. In the case of this study, researchers found testicular oocytes \u201d\u201dfemale eggs found inside male testicles\u201d\u201din male smallmouth and largemouth bass. The<br \/>\nstudy explains, \u201cThe presence of oocytes in the testes of male gonochoristic fish has been used as an indicator of estrogenic exposure.\u201d The source of the estrogen is hard to pinpoint, but pesticides are often cited as a cause given that they widely pollute waterways that \u00a0fish populate. Those chemicals have properties that disrupt the endocrine system and affect the reproductive system, causing development issues such as testicular oocytes. According to USGS, \u201cIntersex is a global issue, as wild-caught fish affected by endocrine-disrupting chemicals have been found in locations across the world.\u201d<\/p>\n<p>According to the <a href=\"http:\/\/www.usgs.gov\/newsroom\/article.asp?ID=4412#.VnsPTFKRCQe\">USGS press release<\/a> for the study, \u201cEstrogenic endocrine-disrupting chemicals are derived from a variety of sources, from natural estrogens to synthetic pharmaceuticals and agrochemicals that enter the waterways. Examples include some types of birth control pills, natural sex hormones in livestock manures, herbicides and pesticides.\u201d<\/p>\n<p>While the study did not look for the sources of endocrine disruption, it did paint a picture of how widespread this abnormality really is, encouraging management actions to combat runoff. \u201cIt is not clear what the specific cause of intersex is in these fish,\u201d said Luke Iwanowicz, a USGS research biologist and lead author of the paper, in their press release. \u201cThis study was designed to identify locations that may warrant further investigation. \u00a0 Chemical analyses of fish or water samples at collection sites were not conducted, so we cannot attribute the observation of intersex to specific, known estrogenic endocrine-disrupting chemicals.\u201d<\/p>\n<p>Last summer, \u00a0<a href=\"http:\/\/link.springer.com\/article\/10.1007\/s10661-014-3868-5\">research by the U.S. Geological Survey (USGS)<strong> \u00a0<\/strong><\/a>showed a strong correlation between the occurrence of intersex characteristics on fish, which have been found in the Chesapeake Bay region, and areas of high agricultural use in Pennsylvania. \u00a0 In addition, a <a href=\"http:\/\/beyondpesticides.org\/dailynewsblog\/2015\/12\/herbicides-and-endocrine-disrupting-chemicals-linked-to-decline-of-smallmouth-bass\/\">recent report<\/a> by the Pennsylvania Department of Environmental Protection (DEP) found rare malignant tumors on smallmouth bass in the Susquehanna River, a river that flows through the northeast from upstate New York to the Chesapeake Bay. The Susquehanna River is a major source of agricultural runoff containing phosphorous, nitrogen, and sediment pollutants, as well as natural animal hormones in manure. Pennsylvania DEP officials are looking to in-depth studies to identify the sources of the endocrine-disrupting compounds and herbicides <a href=\"http:\/\/www.srbc.net\/waterscienceforum\/assets\/docs\/Smith_PAFBC_Water_Science_Forum_Presentation_fs199632.PDF\">likely contributing<\/a> to the tumors.<\/p>\n<p>This is a step that USGS would like to see taken as well. The study states, \u201cA comprehensive re-evaluation that includes chemical analysis and seasonal snapshots of both sites is necessary to identify the likely cause(s) of elevated plasma vitellogenin in these male smallmouth bass.\u201d<\/p>\n<p>In addition to the Pennsylvania DEP study, other scientists are examining fish as a means of gauging water quality and chemical exposure. In 2008, <a href=\"http:\/\/beyondpesticides.org\/dailynewsblog\/2008\/03\/usgs-identifies-contaminants-in-potomac-river-possibly-linked-to-intersex-fish\/\">USGS identified<\/a> ten contaminants, including atrazine, chlorpyrifos, and endosulfan, responsible for intersex fish in the Potomac River. <a href=\"https:\/\/www.beyondpesticides.org\/gateway\/pesticide\/atrazine.htm\">Atrazine<\/a>, one of the most commonly used herbicides in the world, has been shown to affect reproduction of fish at concentrations below U.S. Environmental Protection Agency\u2019s (EPA) water-quality guidelines. A <a href=\"http:\/\/beyondpesticides.org\/dailynewsblog\/2015\/11\/pesticides-bound-to-particles-and-not-detectable-in-water-harm-aquatic-organisms\/\">November study<\/a> found that commonly-used pesticides can persist in and impact the species of a waterway long after the chemicals are detectable or monitored by regulators.<\/p>\n<p>Beyond Pesticides continues to fight to \u00a0prevent water pollution and harmful agricultural practices. Visit our \u00a0<a href=\"https:\/\/www.beyondpesticides.org\/water\/index.php\">Threatened Waters<\/a> \u00a0page and learn how organic land management practices contribute to healthy waters in the article, \u201c<a href=\"https:\/\/www.beyondpesticides.org\/water\/documents\/waterorganicfarminglongfactsheet.pdf\">Organic Land Management and the Protection of Water Quality.<\/a>\u201d<\/p>\n<p><em>All unattributed positions and opinions in this piece are those of Beyond Pesticides.<\/em><\/p>\n<p>Source: \u00a0 <a href=\"http:\/\/www.usgs.gov\/newsroom\/article.asp?ID=4412#.VnrnVhUrKUl\">U.S. Geological Survey<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>(Beyond Pesticides, January 4, 2016) A study published by the U.S. Geological Survey (USGS) and U.S. Fish and Wildlife Service (FWS) found large-scale evidence of intersex in smallmouth and largemouth bass in the Northeast United States, an indicator of endocrine disruption. The study, published in the journal Ecotoxicology and Environmental Safety, looks at 19 U.S. National Wildlife Refuges and is the first reconnaissance survey of this scope. The study found that the prevalence of testicular oocytes across all samples was 85% and 27% for male small- and largemouth bass, respectively. Intersex occurs when one sex develops characteristics of the opposite sex. In the case of this study, researchers found testicular oocytes \u201d\u201dfemale eggs found inside male testicles\u201d\u201din male smallmouth and largemouth bass. The study explains, \u201cThe presence of oocytes in the testes of male gonochoristic fish has been used as an indicator of estrogenic exposure.\u201d The source of the estrogen is hard to pinpoint, but pesticides are often cited as a cause given that they widely pollute waterways that \u00a0fish populate. Those chemicals have properties that disrupt the endocrine system and affect the reproductive system, causing development issues such as testicular oocytes. According to USGS, \u201cIntersex is a global issue, [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[124,155,3,85,343,276,12,13],"tags":[],"class_list":["post-17218","post","type-post","status-publish","format-standard","hentry","category-announcements","category-antibacterial","category-diseasehealth-effects","category-endocrine-disruption","category-pesticide-residues","category-take-action","category-water","category-wildlifeenvironment"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Study Adds to Evidence of Endocrine-Disrupting Chemicals in Intersex Fish - Beyond Pesticides Daily News Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/beyondpesticides.org\/dailynewsblog\/2016\/01\/study-adds-to-evidence-of-endocrine-disrupting-chemicals-in-intersex-fish\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Study Adds to Evidence of Endocrine-Disrupting Chemicals in Intersex Fish - Beyond Pesticides Daily News Blog\" \/>\n<meta property=\"og:description\" content=\"(Beyond Pesticides, January 4, 2016) A study published by the U.S. Geological Survey (USGS) and U.S. Fish and Wildlife Service (FWS) found large-scale evidence of intersex in smallmouth and largemouth bass in the Northeast United States, an indicator of endocrine disruption. The study, published in the journal Ecotoxicology and Environmental Safety, looks at 19 U.S. National Wildlife Refuges and is the first reconnaissance survey of this scope. The study found that the prevalence of testicular oocytes across all samples was 85% and 27% for male small- and largemouth bass, respectively. Intersex occurs when one sex develops characteristics of the opposite sex. In the case of this study, researchers found testicular oocytes \u201d\u201dfemale eggs found inside male testicles\u201d\u201din male smallmouth and largemouth bass. The study explains, \u201cThe presence of oocytes in the testes of male gonochoristic fish has been used as an indicator of estrogenic exposure.\u201d The source of the estrogen is hard to pinpoint, but pesticides are often cited as a cause given that they widely pollute waterways that \u00a0fish populate. Those chemicals have properties that disrupt the endocrine system and affect the reproductive system, causing development issues such as testicular oocytes. According to USGS, \u201cIntersex is a global issue, [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/beyondpesticides.org\/dailynewsblog\/2016\/01\/study-adds-to-evidence-of-endocrine-disrupting-chemicals-in-intersex-fish\/\" \/>\n<meta property=\"og:site_name\" content=\"Beyond Pesticides Daily News Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/beyondpesticides\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/beyondpesticides\/\" \/>\n<meta property=\"article:published_time\" content=\"2016-01-04T04:00:56+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2016-01-04T16:34:01+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/beyondpesticides.org\/dailynewsblog\/wp-content\/uploads\/2016\/01\/smallmouthbass.jpg\" \/>\n<meta name=\"author\" content=\"Beyond Pesticides\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@ByondPesticides\" \/>\n<meta name=\"twitter:site\" content=\"@ByondPesticides\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Beyond Pesticides\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2016\/01\/study-adds-to-evidence-of-endocrine-disrupting-chemicals-in-intersex-fish\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2016\/01\/study-adds-to-evidence-of-endocrine-disrupting-chemicals-in-intersex-fish\/\"},\"author\":{\"name\":\"Beyond Pesticides\",\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/#\/schema\/person\/1b5c0a0981b549cc5b628770073031f4\"},\"headline\":\"Study Adds to Evidence of Endocrine-Disrupting Chemicals in Intersex Fish\",\"datePublished\":\"2016-01-04T04:00:56+00:00\",\"dateModified\":\"2016-01-04T16:34:01+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2016\/01\/study-adds-to-evidence-of-endocrine-disrupting-chemicals-in-intersex-fish\/\"},\"wordCount\":700,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/#organization\"},\"image\":{\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2016\/01\/study-adds-to-evidence-of-endocrine-disrupting-chemicals-in-intersex-fish\/#primaryimage\"},\"thumbnailUrl\":\"http:\/\/beyondpesticides.org\/dailynewsblog\/wp-content\/uploads\/2016\/01\/smallmouthbass.jpg\",\"articleSection\":[\"Announcements\",\"Antibacterial\",\"Disease\/Health Effects\",\"Endocrine Disruption\",\"Pesticide Residues\",\"Take Action\",\"Water\",\"Wildlife\/Endangered Sp.\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/beyondpesticides.org\/dailynewsblog\/2016\/01\/study-adds-to-evidence-of-endocrine-disrupting-chemicals-in-intersex-fish\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2016\/01\/study-adds-to-evidence-of-endocrine-disrupting-chemicals-in-intersex-fish\/\",\"url\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2016\/01\/study-adds-to-evidence-of-endocrine-disrupting-chemicals-in-intersex-fish\/\",\"name\":\"Study Adds to Evidence of Endocrine-Disrupting Chemicals in Intersex Fish - 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The founders, who established Beyond Pesticides (originally as National Coalition Against the Misuse of Pesticides) as a nonprofit membership organization in 1981, felt that without the existence of such an organized, national network, local, state and national pesticide policy would become, under chemical industry pressure, increasingly unresponsive to public health and environmental concerns. Beyond Pesticides believes that people must have a voice in decisions that affect them directly. We believe decisions should not be made for us by chemical companies or by decision-makers who either do not have all of the facts or refuse to consider them. Learn more about our work, read A Year in Review\u20142021, our accomplishments are your victories! Beyond Pesticides seeks to protect healthy air, water, land, and food for ourselves and future generations. By forging ties with governments, nonprofits, and people who rely on these natural resources, we reduce the need for unnecessary pesticide use and protect public health and the environment. Beyond Pesticides provides hands-on services to the public and supports local action by: identifying and interpreting hazards; and, designing safe pest management programs. With the information provided by Beyond Pesticides, people may not only be able to make informed choices and adopt practices that protect themselves and their families from unnecessary exposure to pesticides, but they will be able to effect changes on community-wide pest management decisions and policies that govern pesticide use, such as pesticide uses in parks, schools, for community insect control and along roadsides. 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The study, published in the journal Ecotoxicology and Environmental Safety, looks at 19 U.S. National Wildlife Refuges and is the first reconnaissance survey of this scope. The study found that the prevalence of testicular oocytes across all samples was 85% and 27% for male small- and largemouth bass, respectively. Intersex occurs when one sex develops characteristics of the opposite sex. In the case of this study, researchers found testicular oocytes \u201d\u201dfemale eggs found inside male testicles\u201d\u201din male smallmouth and largemouth bass. The study explains, \u201cThe presence of oocytes in the testes of male gonochoristic fish has been used as an indicator of estrogenic exposure.\u201d The source of the estrogen is hard to pinpoint, but pesticides are often cited as a cause given that they widely pollute waterways that \u00a0fish populate. 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