‘Disco clam’ lights up to scare predators away

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first_imgWEST PALM BEACH, FLORIDA—The bright,  orange-lipped “disco clam” (Ctenoides ales) became a phenom last year when researchers learned that its dazzling display (see video above) proved to be reflections of ambient light and not light produced by the clams themselves. Now that same team has strong evidence that these blinking streaks are telling would-be predators, “Beware!” When the researchers conducted their initial study, they thought perhaps the flashes were used to lure in other clams. But young clams show no preference for the light show; indeed, their 40 eyes fail to respond at all to these lights. Instead, the flashes do seem to help the clam avoid being eaten. The clams, which live off Indonesia, flash twice as much when they spot predators. And when a peacock mantis shrimp attacks one of these 6-centimeter-long clams, the shrimp quickly recoils as if stung or tasting something really terrible, the researchers reported here today at the annual meeting of the Society for Integrative and Comparative Biology. They found that the clam has sulfur in its fleshy lips and tentacles and suspect that, like another clam species that drop tentacles laden with sulfuric acid to deter predators, the disco clam’s sulfur also gets converted into a distasteful substance. The flashing may warn predators away, similar to the bright orange of a monarch butterfly warning birds of its toxic taste.(Main video credit: Lindsey Dougherty; linked video credit: Roy Caldwell, University of California, Berkeley)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

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He was arrested at a New York law firm where he had gone to meet with Nike executives. It was just minutes after he tweeted that he planned to hold a news conference Tuesday to “disclose a major high school/college basketball scandal perpetrated by @Nike that we have uncovered.”ADVERTISEMENT Wintry storm delivers US travel woes before Thanksgiving “When lawyers use their law licenses as weapons, as a guise to extort payments for themselves, they are no longer acting as attorneys. They are acting as criminals,” said Geoffrey S. 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Avenatti describes himself on Twitter as an attorney and advocate, but the accusations describe “a corrupt lawyer who instead fights for his own selfish interests.” Prosecutors said Avenatti and another attorney, whom they called a co-conspirator, initially approached Nike on behalf of a client who coached a Nike-sponsored Amateur Athletic Union basketball program in California.They claimed to have evidence of misconduct by Nike employees and threatened to hold a news conference last week on the eve of a company’s quarterly earnings call and the start of the NCAA tournament. Avenatti told Nike the company could either pay them $15 million to $25 million to investigate the allegations, or pay him more than $22 million for his silence, the criminal complaint said.Two people familiar with the investigation confirmed that the unidentified co-conspirator was Mark Geragos, a Los Angeles criminal defense lawyer known for his work with celebrities. 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