Navigation Links
Migratory moths may hitch their rides, but they're anything but drifters
Date:10/13/2008

Night-traveling migratory moths may hitch a ride on the wind, but a new study in the October 14th issue of Current Biology, a Cell Press publication, confirms that they are anything but drifters.

A previous report also in Current Biology offered the first evidence that Silver Y moths rely on a sophisticated internal compass, sailing on favorable winds to reach their southerly winter destination within a matter of days. Now, the research team that brought us that finding reveals that the moths get back north, where they started from, in the spring by throwing that whole system in reverse.

"In our first paper, we demonstrated how the moths manage to make return migrations of hundreds of kilometers in just a few nights to their more southerly over-wintering ranges, using a compass and an inherited preferred direction," said Jason Chapman of Rothamsted Research in the United Kingdom. "The obvious question arising from that study was: do the migrants also have specialized behaviors to enable them to carry out the spring northwards migrations, or do they just drift with the wind?"

To answer that question, the researchers examined the high-altitude spring migrations of the Silver Y moths into southern U.K. by using vertical-looking radars. Over three years, in June, when the moth migrations are most frequent, they identified 83 high-altitude mass migration "events" 200 to 1,200 meters into the sky.

Those observations showed that the migrant Silver Y moths in spring limit their high-altitude travel to nights with favorable, northward winds, just as they do with the southward winds as winter approaches. They carefully select their altitude to travel in the fastest winds and align themselves such that their own flight speed adds to the wind speed.

The moths also reverse their preferred direction, using their internal compass to make up for any wind drift that sends them off their course north. Chapman said they don't know exactly how the moths do it, but they suspect that the seasonal compass switch is controlled by changes in day length over the course of the year.

He calls the two studies a "big advance in the field of insect migration," noting that there had been no conclusive evidence for a compass sense in nocturnal moths used to guide their migrations. A similar mechanism had been discovered in butterflies that fly low to the ground during the day, he added, but "it is much harder to envisage how these insects are able to carry out these feats of orientation while traveling hundreds of meters above the ground at speeds up to 100 kilometers per hour in almost total darkness."


'/>"/>

Contact: Cathleen Genova
cgenova@cell.com
617-397-2802
Cell Press
Source:Eurekalert

Related biology news :

1. Do migratory birds see the magnetic field?
2. Some migratory birds cant find success in urban areas, study finds
3. Continental plan to protect the monarchs migratory journey
4. Scientists Find new migratory patterns for Mediterranean and Western Atlantic bluefin tuna
5. Moths with a nose for learning
6. Cosmopolitan microbes -- hitchhikers on Darwins dust
7. ESF EURYI award winner aims to stop cancer cells reading their own DNA
8. Elephantnose fish see with their chin
9. Flies can turn off their immune response
10. UCR plant cell biologist to study how plant stem cells maintain and change their identity
11. Species still have more viable offspring if they can choose their best mate
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/19/2017)... , April 19, 2017 ... its vendor landscape is marked by the presence of ... is however held by five major players - 3M ... these companies accounted for nearly 61% of the global ... leading companies in the global military biometrics market boast ...
(Date:4/13/2017)... Calif. , April 13, 2017 UBM,s ... York will feature emerging and evolving technology ... Both Innovation Summits will run alongside the expo portion ... speaker sessions, panels and demonstrations focused on trending topics ... largest advanced design and manufacturing event will take place ...
(Date:4/11/2017)... Research and Markets has announced the addition ... their offering. ... tracking market to grow at a CAGR of 30.37% during the ... 2017-2021, has been prepared based on an in-depth market analysis with ... its growth prospects over the coming years. The report also includes ...
Breaking Biology News(10 mins):
(Date:4/21/2017)... ... , ... Frederick Innovative Technology Center, Inc. (FITCI), a business ... earned a $77,518 grant from the Rural Maryland Council (RMC) to support refurbishment ... first incubator. A non-profit corporation, FITCI is a public-private partnership of the governments ...
(Date:4/20/2017)... ... 20, 2017 , ... USDM Life Sciences , the leading risk management, ... is pleased to announce Holger Braemer as Vice President of its Europe ... in Germany. , Braemer is an integral part of USDM’s expansion of services ...
(Date:4/20/2017)... ... April 20, 2017 , ... Energetiq Technology ... announced today that Chief Executive Officer (CEO) Debbie Gustafson has been appointed to ... global industry association connecting the electronics manufacturing supply chain. The mission of the ...
(Date:4/20/2017)... N.J. and PETACH TIKVAH, Israel ... BCLI), a leading developer of adult stem cell technologies for ... Executive Officer, will present at the Alliance for Regenerative Medicine,s ... Day on Thursday, April 27, 2017 at 09:40 EDT in ... Ralph Kern , MD, MHSc, Chief Medical Officer & ...
Breaking Biology Technology: