Bats change their tune to cope with human noise pollution

first_imgBats “see” their world through sound. So what do they do in the fog of noise created by humans? It appears some seek out quieter spots and change their calls. Scientists trying to decipher how bats cope with the racket of modernity went to natural gas fields in northern New Mexico. Some wells are equipped with compressors that create a constant din, while other wells are quieter. During 2 months of listening for the calls that bats use to locate prey, researchers found that Brazilian free-tailed bats spent 40% less time near compressors. These bats also altered their cries to a narrower acoustic range near the machinery. Bats with higher pitched calls more distinct from the compressors didn’t show changes. The study, published online this month in Global Ecology and Conservation, is the first to document bats in the wild changing behavior around human noise. It follows laboratory research that sounds of machinery hurt the performance of a bat species that hunts by listening for insects moving on the ground. The results raise the possibility that noise pollution is hurting some bats by depriving them of habitat or impairing hunting. Compressor noise in the study area covers 356 square kilometers of land where the free-tailed bats live, according to the study.*Correction, 17 November, 11:12 a.m.: This item originally stated that compressor noise covers 356 square kilometers of land in places where the free-tailed bats live. The 356 square kilometers is actually the portion of the San Juan Basin (the location of the study) where the bats could be affected by compressor noise. The item has been corrected to reflect this.Sign up for our daily newsletterGet more great content like this delivered right to you!Country *AfghanistanAland IslandsAlbaniaAlgeriaAndorraAngolaAnguillaAntarcticaAntigua and BarbudaArgentinaArmeniaArubaAustraliaAustriaAzerbaijanBahamasBahrainBangladeshBarbadosBelarusBelgiumBelizeBeninBermudaBhutanBolivia, Plurinational State ofBonaire, Sint Eustatius and SabaBosnia and HerzegovinaBotswanaBouvet IslandBrazilBritish Indian Ocean TerritoryBrunei DarussalamBulgariaBurkina FasoBurundiCambodiaCameroonCanadaCape VerdeCayman IslandsCentral African RepublicChadChileChinaChristmas IslandCocos (Keeling) IslandsColombiaComorosCongoCongo, The Democratic Republic of theCook IslandsCosta RicaCote D’IvoireCroatiaCubaCuraçaoCyprusCzech RepublicDenmarkDjiboutiDominicaDominican RepublicEcuadorEgyptEl SalvadorEquatorial GuineaEritreaEstoniaEthiopiaFalkland Islands (Malvinas)Faroe IslandsFijiFinlandFranceFrench GuianaFrench PolynesiaFrench Southern TerritoriesGabonGambiaGeorgiaGermanyGhanaGibraltarGreeceGreenlandGrenadaGuadeloupeGuatemalaGuernseyGuineaGuinea-BissauGuyanaHaitiHeard Island and Mcdonald IslandsHoly See (Vatican City State)HondurasHong KongHungaryIcelandIndiaIndonesiaIran, Islamic Republic ofIraqIrelandIsle of ManIsraelItalyJamaicaJapanJerseyJordanKazakhstanKenyaKiribatiKorea, Democratic People’s Republic ofKorea, Republic ofKuwaitKyrgyzstanLao People’s Democratic RepublicLatviaLebanonLesothoLiberiaLibyan Arab JamahiriyaLiechtensteinLithuaniaLuxembourgMacaoMacedonia, The Former Yugoslav Republic ofMadagascarMalawiMalaysiaMaldivesMaliMaltaMartiniqueMauritaniaMauritiusMayotteMexicoMoldova, Republic ofMonacoMongoliaMontenegroMontserratMoroccoMozambiqueMyanmarNamibiaNauruNepalNetherlandsNew CaledoniaNew ZealandNicaraguaNigerNigeriaNiueNorfolk IslandNorwayOmanPakistanPalestinianPanamaPapua New GuineaParaguayPeruPhilippinesPitcairnPolandPortugalQatarReunionRomaniaRussian FederationRWANDASaint Barthélemy Saint Helena, Ascension and Tristan da CunhaSaint Kitts and NevisSaint LuciaSaint Martin (French part)Saint Pierre and MiquelonSaint Vincent and the GrenadinesSamoaSan MarinoSao Tome and PrincipeSaudi ArabiaSenegalSerbiaSeychellesSierra LeoneSingaporeSint Maarten (Dutch part)SlovakiaSloveniaSolomon IslandsSomaliaSouth AfricaSouth Georgia and the South Sandwich IslandsSouth SudanSpainSri LankaSudanSurinameSvalbard and Jan MayenSwazilandSwedenSwitzerlandSyrian Arab RepublicTaiwanTajikistanTanzania, United Republic ofThailandTimor-LesteTogoTokelauTongaTrinidad and TobagoTunisiaTurkeyTurkmenistanTurks and Caicos IslandsTuvaluUgandaUkraineUnited Arab EmiratesUnited KingdomUnited StatesUruguayUzbekistanVanuatuVenezuela, Bolivarian Republic ofVietnamVirgin Islands, BritishWallis and FutunaWestern SaharaYemenZambiaZimbabweI also wish to receive emails from AAAS/Science and Science advertisers, including information on products, services and special offers which may include but are not limited to news, careers information & upcoming events.Required fields are included by an asterisk(*)last_img read more

Government Fights Document Release in GSE Profit Suit

first_imgGovernment Fights Document Release in GSE Profit Suit in Daily Dose, Featured, News, Secondary Market The government has fought back in the battle over Fannie Mae and Freddie Mac profits.In September, Judge Margaret Sweeney in the U.S. Court of Federal Claims ordered the U.S. Department of Treasury to release 56 documents related to sweeping of GSE profits into Treasury in a shareholder lawsuit.The government is refusing to release the documents, however. The government asked the U.S. Court of Appeals for the Federal Circuit to issue a writ of mandamus seeking to have Sweeney’s order reversed. A writ of mandamus is a direct order to a lower court that is considered a drastic and extraordinary measure that is typically used only an abuse of discretion has occurred. According to the Wall Street Journal, the appeals court agreed to consider the government’s request on Thursday, October 27; Fairholme has seven days to respond.Sweeney’s ruling required the government to turn over the 56 documents to Florida-based mutual fund Fairholme Funds and other GSE shareholders. According to Fortune, presidential privilege was cited in the government’s decision to withhold four of the 56 documents ordered to be released which were either authored or sent to then-National Economic Council Director Gene Sperling, who in May 2016 was named Hillary Clinton’s top economic advisor.The GSEs’ bailout agreement was amended in August 2012 to require all of Fannie Mae’s and Freddie Mac’s profits to be swept into Treasury quarterly. The original agreement required only a 10 percent dividend to be paid to Treasury annually. The Net Worth Sweep, as it has come to be known, has prompted close to two dozen lawsuits from GSE investors who claim the sweep is illegal.In April 2016, Sweeney ordered the unsealing of seven documents related to the Net Worth Sweep that seem to suggest that key government officials (namely the CFO at Fannie Mae at the time, Susan McFarland) knew that the GSEs were on the brink of major profitability in the summer of 2012 right before the bailout agreement was amended. October 31, 2016 499 Views center_img Share GSE Profits Lawsuits Net Worth Sweep 2016-10-31 Seth Welbornlast_img read more