Navigation Links
Monarch butterflies down again this year as decline continues, says Texas A&M expert
Date:3/21/2012

COLLEGE STATION, March 21, 2012 Unlike their colorful wings, the future of Monarch butterflies may not be too bright and their numbers are expected to be alarmingly down again this year, says a Texas A&M University researcher.

Craig Wilson, a senior research associate in the Center for Mathematics and Science Education and a long-time butterfly enthusiast, says reports by the World Wildlife Fund, private donors and Mexico's Michoacan state show that Monarch numbers will be down almost 30 percent in 2012 as they make their annual trek from their breeding grounds in Mexico and move across Texas.

The figures show an alarming decades-long decline in their numbers, Wilson says, adding that it is best "that we take the long view rather than yearly cycles.

"The latest information shows that Monarchs will be down from 25 to 30 percent this year, and that has been part of a disturbing trend the last few years," Wilson notes.

"Last year's severe drought and fires in the region no doubt played a part, resulting in less nectar for the Monarchs as they migrated south. But estimates show that each year, millions of acres of land are being lost that would support Monarchs, either by farmers converting dormant land for crop use mainly to herbicide tolerant corn and soybeans or the overuse of herbicides and mowing. Milkweed is the key plant because it's the only plant where the female will lay her eggs."

The loss of such lands is a critical factor in the Monarchs' survival, Wilson explains.

"Chip Taylor, who is the director of Monarch Watch at the University of Kansas, estimates that 100 million acres of land have already been lost that previously supported Monarchs," Wilson notes.

Most of the Monarch reserves are in the Mexican state of Michoacan. It's an area where Monarchs spend the winter and mate before heading north, Wilson points out.

In the spring, the butterflies leave Mexico and across Texas, and Wilson has noticed both eggs and young Monarch caterpillars feeding on milkweed in the Monarch Waystation, a butterfly garden outside his office. The adults will fly various routes through Texas, with the fourth generation eventually arriving in Canada.

This year, according to the Texas Monarch Watch, Monarchs covered about 7.14 acres of forest in their Mexican breeding grounds compared to 9.9 acres last year, and it shows a continued long-term downward trend in Monarch population since official surveys began in 1994.

Wilson says there has to be a national effort to save Monarchs or their declining numbers will reach the critical stage.

"We need a national priority of planting milkweed to assure there will be Monarchs in the future," he says. "If we could get several states to collaborate, we might be able to promote a program where the north-south interstates were planted with milkweed, such as Lady Bird Johnson's program to plant native seeds along Texas highways 35-40 years ago. This would provide a 'feeding' corridor right up to Canada for the Monarchs."


'/>"/>

Contact: Keith Randall
keith-randall@tamu.edu
979-845-4644
Texas A&M University
Source:Eurekalert

Related biology news :

1. As monarch butterflies journey north, gardeners can help protect species, researcher says
2. U of G research reveals how monarchs fly away home
3. Study finds monarch butterflies use medicinal plants to treat offspring for disease
4. Study reveals how monarch butterflies recolonize northern breeding range
5. Hind wings help butterflies make swift turns to evade predators, study finds
6. Now butterflies are also being counted in China, Australia and Israel
7. From butterflies wings to bank notes -- how natures colors could cut bank fraud
8. Butterflies shed light on how some species respond to global warming
9. Wildflower colors tell butterflies how to do their jobs
10. No safety in numbers for moths and butterflies
11. Research reveals how butterflies copy their neighbors to fool birds
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/2/2016)... The Department of Transport Management (DOTM) of ... project, for the , Supply and Delivery of ... Infrastructure , to Decatur , ... Management Solutions. Numerous renowned international vendors participated in the tendering ... selected for the most compliant and innovative solution. The contract ...
(Date:6/1/2016)... 2016 Favorable Government Initiatives Coupled ... Criminal Identification to Boost Global Biometrics System Market Through ... Research report, " Global Biometrics Market By Type, ... Opportunities, 2011 - 2021", the global biometrics market is ... account of growing security concerns across various end use ...
(Date:5/16/2016)... , May 16, 2016   EyeLock LLC ... today announced the opening of an IoT Center of ... strengthen and expand the development of embedded iris biometric ... unprecedented level of convenience and security with unmatched biometric ... one,s identity aside from DNA. EyeLock,s platform uses video ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... 2016 /PRNewswire/ - BIOREM Inc. (TSX-V: BRM) ("Biorem" or "the ... major shareholders, Clean Technology Fund I, LP and Clean ... based venture capital funds which together hold approximately ... fully diluted, as converted basis), that they have entered ... equity holdings in Biorem to TUS Holdings Co. Ltd. ...
(Date:6/27/2016)... (PRWEB) , ... June 27, 2016 , ... Parallel ... clinical trials, announced today the Clinical Reach Virtual Patient Encounter CONSULT module ... circle with the physician and clinical trial team. , Using the CONSULT module, patients ...
(Date:6/27/2016)... , June 27, 2016  Liquid Biotech ... the funding of a Sponsored Research Agreement with ... tumor cells (CTCs) from cancer patients.  The funding ... CTC levels correlate with clinical outcomes in cancer ... data will then be employed to support the ...
(Date:6/24/2016)... June 24, 2016 Epic Sciences unveiled ... cancers susceptible to PARP inhibitors by targeting homologous ... (CTCs). The new test has already been incorporated ... multiple cancer types. Over 230 clinical ... response pathways, including PARP, ATM, ATR, DNA-PK and ...
Breaking Biology Technology: