Navigation Links
Study finds that long-distance migration shapes butterfly wings

Athens, Ga. A University of Georgia study has found that monarch butterflies that migrate long distances have evolved significantly larger and more elongated wings than their stationary cousins, differences that are consistent with traits known to enhance flight ability in other migratory species.

As part of a National Science Foundation and UGA-funded study, researchers in the Warnell School of Forestry and Natural Resources and the Odum School of Ecology examined the size and shape of monarchs from migratory and non-migratory populations using sophisticated computer imaging that was able to measure precise details about the insects' wings. Warnell doctoral candidate Andy Davis and Odum Associate Professor Sonia Altizer compared migratory monarchs from the eastern and western U.S. to those in Hawaii, Costa Rica, South Florida and Puerto Rico that do not migrate. They also measured the wings of lab-grown monarchs to rule out environmental causes of differences in size and shape, and to demonstrate a genetic basis for variation in wing traits among individual monarchs. Altizer and Davis' findings were recently published in the online edition of the scientific journal Evolution.

The findings in monarchs were consistent with previous studies comparing migratory and non-migratory bird species, which indicate that the best shape for long-distance flight involves long wings with a narrow tip to help reduce drag. In addition to their findings on wing size and shape, the team also found that monarchs from the two migratory populations in the U.S. differed in body size, suggesting that each population could have adapted to the demands of migration in subtly different ways. Larger bodies might help eastern monarchs, with their much longer migration, carry fat deposits to fuel the long journey and five-month overwintering period in Mexico.

Monarchs in eastern North America, famous for migrating the longest distances of any insect species in the world, face a number of threats, to the point that monarch migration is considered to be an "endangered phenomenon." Davis has published previous research indicating that female monarch butterflies are on a 30-year decline in the eastern U.S., a troubling pattern that paints a dire picture for population recruitment. Furthermore, monarchs from this population are prone to periodic population crashes from storms at the Mexican overwintering site. Although monarchs worldwide are not threatened, Altizer said, those with the larger wingspan are. "Our study shows that we would lose an evolutionarily unique population if the migration of eastern monarchs were to unravel," she said.

Contact: Sandi Martin
University of Georgia

Related biology news :

1. Brain study offers insight into causes of autism
2. Study finds surprising new branches on arthropod family tree
3. New genome sequence will aid study of important food, fuel crops
4. New UC Davis study: Climate tipping points may arrive without warning, says top forecaster
5. Multicenter study finds little effect of soy isoflavones on bone loss in postmenopausal women
6. New study examines the impact on children of food product placements in the movies
7. Comprehensive study using bioinformatics predicts the molecular causes of many genetic diseases
8. Study reveals new details on the dangers of third-hand smoke
9. UC Davis study confirms link between advanced maternal age and autism
10. NTU researchers complete the worlds first in-depth study of the malaria parasite genome
11. Study reveals potential evolutionary role for same-sex attraction
Post Your Comments:
(Date:11/17/2015)... 2015 Paris , ... --> Paris , qui s,est tenu ... le leader de l,innovation biométrique, a inventé le premier ... empreintes sur la même surface de balayage. Jusqu,ici, deux ... pour les empreintes digitales. Désormais, un seul scanner est ...
(Date:11/17/2015)... SOUTH EASTON, Mass. , Nov. 17, 2015 /PRNewswire/ ... "Company"), a leader in the development and sale of ... to the worldwide life sciences industry, today announced it ... closing of its $5 million Private Placement (the "Offering"), ... Offering to $4,025,000.  One or more additional closings are ...
(Date:11/12/2015)... 12, 2015  A golden retriever that stayed healthy ... (DMD) has provided a new lead for treating this ... Broad Institute of MIT and Harvard and the University ... Cell, pinpoints a protective gene ... disease,s effects. The Boston Children,s lab of Lou ...
Breaking Biology News(10 mins):
(Date:11/25/2015)... CITY , Nov. 25, 2015 /PRNewswire/ - Aeterna ... affirms that its business and prospects remain fundamentally ... , Zoptrex™ (zoptarelin doxorubicin) recently received DSMB recommendation ... to completion following review of the final interim ... Phase 2 Primary Endpoint in men with heavily ...
(Date:11/25/2015)... , November 25, 2015 ... Research Report is a professional and in-depth study ...      (Logo: ) , ... of the industry including definitions, classifications, applications and ... provided for the international markets including development trends, ...
(Date:11/24/2015)... HILLS, N.J. (PRWEB) , ... November 24, 2015 , ... ... as the recipient of the 2016 USGA Green Section Award. Presented annually since 1961, ... golf through his or her work with turfgrass. , Clarke, of Iselin, ...
(Date:11/24/2015)... - iCo Therapeutics ("iCo" or "the Company") (TSX-V: ICO) ... quarter ended September 30, 2015. Amounts, unless specified ... under International Financial Reporting Standards ("IFRS"). ... Andrew Rae , President & CEO of iCo ... value enriching for this clinical program, but also ...
Breaking Biology Technology: