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EPA sues bankrupt Oahu Sugar Co. over pesticide dumping in Waipio EPA sued bankruptcy Oahu Sugar Co. over pesticide dumping By Rick Daysog | April 26, 2021 at 5:42 PM HST - Updated April 26 at 5:42 PM HONOLULU, Hawaii (HawaiiNewsNow) - The Environmental Protection Agency has sued the bankrupt Oahu Sugar Co. and it’s mainland owners over pesticide dumping. In a federal court lawsuit filed last week, the EPA alleged that Oahu Sugar ― which shut down in 1995 and filed for bankruptcy in 2005 ― operated a pesticide mixing plant on the Waipio penninsula for decades that spilled toxic chemicals into the land. “I see an ecological nightmare going unchecked,” said environmental activist Carroll Cox, who has documented the contamination since 2005. ....
Close Antarctica is often perceived as nothing more than a lifeless barren of cold. A frozen dessert. However, not many are aware of the booming and flourishing population of Weddel seals that dominated the waters of the frozen south. There, they create a soundscape that a lot of creatures, especially humans, are unaware of. (Photo : Vassil Tzvetano on Wikimedia Commons) These pinnipeds typically emit high-pitched pings that sound like laser guns in a science-fiction movie. But that is not their entire repertoire. Research reveals that a significant portion of their calls is at ultrasonic frequencies, high pitches well beyond the 20-kilohertz limit of most human hearing. ....
Print Weddell seals use a breathing hole in the frozen surface of the Ross Sea. Credit: Alasdair Turner Advertisement Above the frozen ocean, Antarctica can be eerily quiet. Gusts of wind are often all one hears. Below, though, the Southern Ocean is a living soundscape dominated by Weddell seals. These pinnipeds typically emit high-pitched pings that sound like laser guns in a science-fiction movie. But that is not their entire repertoire. Research now reveals that a significant portion of their calls are at ultrasonic frequencies, high pitches well beyond the 20-kilohertz limit of most human hearing. University of Oregon marine biologist Paul Cziko installed a livestreaming audio and video system at Antarctica’s McMurdo Station in 2017, allowing scientists to listen in on the massive mammals’ underwater calls. Data from the setup yielded surprising results: The seals sometimes vocalized at extremely high, ultrasonic frequencies of more than 200 kilohertz, Czi ....
Marine biologists from the University of Oregon and the University of New Brunswick have recorded common, previously unknown, ultrasonic vocalizations produced by Weddell seals ( Leptonychotes weddellii), the world’s southernmost-ranging mammal. They’ve identified nine recurrent call types in more than one year (2017-2018) of broadband acoustic data obtained by a continuously recording underwater observatory in McMurdo Sound, Antarctica. Weddell seals ( Leptonychotes weddellii). Image credit: Elliott Devries. Weddell seals are a species of large and relatively abundant true seals in the family Phocidae. They have a circumpolar distribution around Antarctica, including the highest-latitude coastal regions. In contrast to the other Antarctic seals, they prefer expanses of heavy pack ice or thick shore-fast sea ice, using their teeth to maintain access holes in the ice. ....
| UPDATED: 15:11, Wed, Dec 23, 2020 Link copied Sign up for FREE for the biggest new releases, reviews and tech hacks SUBSCRIBE Invalid email When you subscribe we will use the information you provide to send you these newsletters. Sometimes they ll include recommendations for other related newsletters or services we offer. Our Privacy Notice explains more about how we use your data, and your rights. You can unsubscribe at any time. Researchers on Antarctica have long been puzzled by the presence of mysterious ultrasonic signals originating from beneath the icy depths. But they now know Weddell seals are the acoustic animal responsible for strange noises coming from below the ice. ....