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:4/17/2017)... 2017 NXT-ID, Inc. (NASDAQ: NXTD ) ... of its 2016 Annual Report on Form 10-K on Thursday April ... ... in the Investor Relations section of the Company,s website at ... at http://www.sec.gov . 2016 Year Highlights: ...
(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 ...
(Date:4/5/2017)... -- The Allen Institute for Cell Science today announces the ... and dynamic digital window into the human cell. The ... of deep learning to create predictive models of cell ... growing suite of powerful tools. The Allen Cell Explorer ... available resources created and shared by the Allen Institute ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... and LAGUNA HILLS, Calif. , Oct. ... Cancer Research, London (ICR) and University ... SKY92, SkylineDx,s prognostic tool to risk-stratify patients with multiple myeloma ... MUK nine . The University of Leeds ... partly funded by Myeloma UK, and ICR will perform the ...
(Date:10/10/2017)... Los Angeles, CA (PRWEB) , ... ... ... Pharmaceuticals, Inc., a development-stage cancer-focused pharmaceutical company advancing targeted antibody-drug conjugate (ADC) ... all uses of targeted HPLN (Hybrid Polymerized Liposomal Nanoparticle), a technology developed ...
(Date:10/10/2017)... BARBARA, CALIFORNIA (PRWEB) , ... October 10, 2017 ... ... management, technological innovation and business process optimization firm for the life sciences and ... BoxWorks conference in San Francisco. , The presentation, “Automating GxP Validation ...
(Date:10/9/2017)... ... 09, 2017 , ... The Giving Tree Wellness Center announces ... needs of consumers who are incorporating medical marijuana into their wellness and health ... As operators of two successful Valley dispensaries, The Giving Tree’s two founders, Lilach ...
Breaking Biology Technology: