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dc.contributor.advisorMarcia Bartusiak.en_US
dc.contributor.authorRice, Jocelynen_US
dc.contributor.otherMassachusetts Institute of Technology. Graduate Program in Science Writing.en_US
dc.date.accessioned2008-09-03T14:43:45Z
dc.date.available2008-09-03T14:43:45Z
dc.date.copyright2007en_US
dc.date.issued2007en_US
dc.identifier.urihttp://hdl.handle.net/1721.1/42148
dc.descriptionThesis (S.M. in Science Writing)--Massachusetts Institute of Technology, Dept. of Humanities, Graduate Program in Science Writing, 2007.en_US
dc.descriptionIncludes bibliographical references (leaf 45).en_US
dc.description.abstractEach fall, the entire monarch butterfly population of the Eastern United States and Canada funnels into a handful of oyamel pine groves in Michoacan, Mexico, to weather the winter months. Each spring, the butterflies mate and fly north to repopulate the continent in short generational bursts. The monarchs flying south in the fall are three generations removed from those that made the trip the previous year. With no parents to guide its way, a migrating monarch has only its genes to steer it to its Mexican overwintering site. Monarchs orient using the sun as a guidepost. Because the sun appears to move across the sky throughout the day, the butterflies must keep track of time in order to correctly interpret the sun's position. Although this so-called "time-compensated sun compass" was demonstrated in 1997, little was known about how it worked. Steven Reppert, a neurobiologist at the University of Massachusetts Medical School in Worcester, MA, is working to change that. His lab seeks to understand the cellular and molecular mechanisms monarchs use to guide them on their remarkable yearly journey. Reppert and his colleagues believe they have pinpointed the sun compass, and the circadian clock that guides it, in the monarch brain. They have shown how the clock and compass might work together to allow the monarchs to find their way to Mexico. Their work has also uncovered some unexpected insights into the workings and evolution of circadian clocks in general. This thesis profiles these discoveries, exploring how circadian biology has illuminated monarch migration, and how monarchs, in turn, have illuminated circadian biology.en_US
dc.description.statementofresponsibilityby Jocelyn Rice.en_US
dc.format.extent45 leavesen_US
dc.language.isoengen_US
dc.publisherMassachusetts Institute of Technologyen_US
dc.rightsM.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.en_US
dc.rights.urihttp://dspace.mit.edu/handle/1721.1/7582en_US
dc.subjectGraduate Program in Science Writing.en_US
dc.titleThe butterfly clock : illuminating the molecular mysteries of monarch migrationen_US
dc.title.alternativeIlluminating the molecular mysteries of monarch migrationen_US
dc.typeThesisen_US
dc.description.degreeS.M.in Science Writingen_US
dc.contributor.departmentMassachusetts Institute of Technology. Graduate Program in Science Writingen_US
dc.contributor.departmentMIT Program in Writing & Humanistic Studies
dc.identifier.oclc228414885en_US


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