Publication Date:
2009-09-26
Description:
During their fall migration, Eastern North American monarch butterflies (Danaus plexippus) use a time-compensated Sun compass to aid navigation to their overwintering grounds in central Mexico. It has been assumed that the circadian clock that provides time compensation resides in the brain, although this assumption has never been examined directly. Here, we show that the antennae are necessary for proper time-compensated Sun compass orientation in migratory monarch butterflies, that antennal clocks exist in monarchs, and that they likely provide the primary timing mechanism for Sun compass orientation. These unexpected findings pose a novel function for the antennae and open a new line of investigation into clock-compass connections that may extend widely to other insects that use this orientation mechanism.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2754321/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉 〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2754321/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Merlin, Christine -- Gegear, Robert J -- Reppert, Steven M -- R01 GM086794/GM/NIGMS NIH HHS/ -- R01 GM086794-01/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2009 Sep 25;325(5948):1700-4. doi: 10.1126/science.1176221.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, University of Massachusetts Medical School, Worcester, MA 01605, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19779201" target="_blank"〉PubMed〈/a〉
Keywords:
Animal Migration/*physiology
;
Animals
;
Biological Clocks/*physiology
;
Brain/cytology/physiology
;
Butterflies/genetics/*physiology
;
Circadian Rhythm/*physiology
;
Cryptochromes
;
Flavoproteins/genetics/metabolism
;
Flight, Animal/*physiology
;
Gene Expression
;
Insect Proteins/genetics/metabolism
;
Nuclear Proteins/genetics/metabolism
;
Orientation
;
Period Circadian Proteins
;
Photoreceptor Cells, Invertebrate/physiology
;
RNA, Messenger/genetics/metabolism
;
Seasons
;
Sense Organs/physiology
;
*Solar System
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
