{"id":122167,"date":"2026-09-01T15:13:41","date_gmt":"2026-09-01T09:43:41","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=122167"},"modified":"2026-09-01T15:29:00","modified_gmt":"2026-09-01T09:59:00","slug":"rotenone","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/rotenone\/","title":{"rendered":"Rotenone"},"content":{"rendered":"<h2><b>Rotenone Latest News<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">In a remote corner of Southcentral Alaska, state biologists carried out a dramatic restoration: they treated an entire lake with rotenone, a plant-derived piscicide, to wipe out an invasive population of northern pike. <\/span><\/p>\n<h2><b>About Rotenone<\/b><\/h2>\n<ul>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><span style=\"font-weight: 400;\">It is a <\/span><b>naturally occurring compound <\/b><span style=\"font-weight: 400;\">derived from the <\/span><b>roots of tropical plants<\/b><span style=\"font-weight: 400;\"> in the genus Derris, Lonchocarpus, or Tephrosia.\u00a0\u00a0<\/span><\/li>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><span style=\"font-weight: 400;\">It is commonly used as an <\/span><b>insecticide<\/b><span style=\"font-weight: 400;\"> and a pesticide.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><span style=\"font-weight: 400;\">It has been used for decades in <\/span><b>fisheries management to remove unwanted fish<\/b><span style=\"font-weight: 400;\"> from lakes and streams.<\/span><\/li>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><span style=\"font-weight: 400;\">When applied at carefully calculated concentrations, it <\/span><b>blocks oxygen uptake in fish gills, killing fish<\/b><span style=\"font-weight: 400;\"> while <\/span><b>leaving most other aquatic organisms unaffected.<\/b><\/li>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The chemical breaks down relatively quickly in sunlight and warm water.<\/span><\/li>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Currently, rotenone is commercially<\/span><b> available as either a wettable powder or liquid.<\/b><\/li>\n<\/ul>\n<h2><b>Key Facts about Northern Pike\u00a0<\/b><\/h2>\n<ul>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">It is a<\/span><b> freshwater predatory fish <\/b><span style=\"font-weight: 400;\">belonging to the pike family (Esocidae).\u00a0<\/span><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Scientific Name: Esox lucius\u00a0<\/span><\/li>\n<li style=\"text-align: justify;\"><b>Habitat and Distribution:\u00a0<\/b>\n<ul>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">They are native in all of the c<\/span><b>ircumpolar regions.\u00a0\u00a0<\/b><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">They can be found through much of the <\/span><b>northern reaches of the USA, parts of Alaska, Canada, Europe, and Asia<\/b><span style=\"font-weight: 400;\"> in both<\/span><b> rivers and lakes <\/b><span style=\"font-weight: 400;\">as well as the <\/span><b>brackish waters of the <a href=\"https:\/\/vajiramandravi.com\/current-affairs\/baltic-sea\/\" target=\"_blank\">Baltic Sea<\/a>.\u00a0\u00a0\u00a0<\/b><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Unfortunately this hearty fish species is often found out of its northern native range, where they can become a nuisance because they <\/span><b>devour other native fish <\/b><span style=\"font-weight: 400;\">such as trout, perch, and bass.\u00a0\u00a0<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"text-align: justify;\"><b>Features:<\/b>\n<ul>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Their <\/span><b>elongated slender bodies help them hide<\/b><span style=\"font-weight: 400;\"> in weeds and among logs and rocks to ambush prey half their size.\u00a0\u00a0<\/span><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">They have a long head and flattened snout.\u00a0 Their <\/span><b>mouths are enormous,<\/b><span style=\"font-weight: 400;\"> with a one-way road of teeth.\u00a0<\/span><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">These aggressive fish are striking in appearance, usually<\/span><b> brownish green on top and sides<\/b><span style=\"font-weight: 400;\"> covered with <\/span><b>whitish bar-like spots.\u00a0\u00a0<\/b><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">The fins are dashed with red and brown streaks and darker dots, and the belly is cream-colored and white.\u00a0<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"text-align: justify;\"><b>Conservation Status:<\/b>\n<ul>\n<li style=\"text-align: justify;\"><span style=\"font-weight: 400;\">IUCN Red List:<\/span><b> Least Concern<\/b><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><b>News: <\/b><a href=\"https:\/\/timesofindia.indiatimes.com\/world\/us\/alaska-used-rotenone-to-eliminate-invasive-pike-from-an-entire-lake-the-pike-vanished-and-6836-arctic-char-were-later-stocked-to-rebuild-the-native-fishery\/articleshow\/133628680.cms\" target=\"_blank\" rel=\"nofollow noopener\"><b>TOI<\/b><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rotenone is a naturally occurring compound derived from the roots of tropical plants in the genus Derris, Lonchocarpus, or Tephrosia.  Read more about Rotenone, Habitat and Distribution, Features, Latest News.<\/p>\n","protected":false},"author":23,"featured_media":122110,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[21,9936,22,23],"class_list":["post-122167","post","type-post","status-publish","format-standard","has-post-thumbnail","category-upsc-prelims-current-affairs","tag-prelims-pointers","tag-rotenone","tag-upsc-current-affairs","tag-upsc-prelims-current-affairs","no-featured-image-padding"],"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/122167","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/23"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=122167"}],"version-history":[{"count":4,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/122167\/revisions"}],"predecessor-version":[{"id":122244,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/122167\/revisions\/122244"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/122110"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=122167"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=122167"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=122167"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}