Navigation Links
In the migratory marathon, parasitized monarchs drop out early

It seems survival of the fittest affect every organism on Earth, even Monarch butterflies. Migratory Monarchs seem more resistant than non-migratory ones to parasite infections; scientists just uncovered why it is so. Explanation : infected monarchs quite don't make it while migrating long distances, so they can't propagate the infection once arrived at destination.

A little-studied outcome of animal migration is whether these long journeys can limit the spread of parasites by weeding out diseased animals. Monarch butterflies in eastern North America fly up to thousands of kilometers from Canada to Central Mexico ?one of the longest migrations of any insect species. Emory University researchers found that monarchs infected with a protozoan parasite fly slower, tire out faster and expend more energy flying than healthy monarchs.

These results, published in the March issue of Ecology Letters, could explain why parasite infections are much lower in migratory monarch populations compared to year-round residents that do not migrate. Habitat loss at overwintering sites and climate warming trends, combined with an increase of tropical milkweed species in milder climates, could ultimately replace the large migratory populations with smaller remnants that breed year-round and do not migrate.

Study results suggest that if migration is lost from this system, remaining populations will become heavily parasitized. More generally, this study demonstrated that seemingly small effects of parasites on their hosts could have a much larger impact when combined with the stresses of long-distance migration.


'"/>

Source:Blackwell Publishing Ltd.


Page: 1

Related biology news :

1. How satellite tracking revealed the migratory mysteries of endangered Atlantic loggerhead turtles
2. Light guides flight of migratory birds
3. Male circumcision reduces HIV risk, study stopped early
4. Prion disease treatable if caught early
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:12/5/2016)... WASHINGTON , Dec. 5, 2016  The ... (NIJ), today published "Can CT Scans Enhance or ... examines the potential of supporting or replacing forensic ... a CT scan. In response to ... NIJ is exploring using CT scans as a ...
(Date:11/30/2016)... Nov. 30, 2016  higi SH llc (higi) ... initiative targeting national brands, industry thought-leaders and celebrity ... respective audiences for taking steps to live healthier, ... in 2012, higi has built the largest self-screening ... 38 million people who have conducted over 185 ...
(Date:11/28/2016)... Nov. 28, 2016 "The ... of 16.79%" The biometric system market is in ... in the near future. The biometric system market is ... 2022, at a CAGR of 16.79% between 2016 and ... of biometric technology in smartphones, rising use of biometric ...
Breaking Biology News(10 mins):
(Date:12/8/2016)... N.J. , Dec. 8, 2016 Soligenix, ... biopharmaceutical company focused on developing and commercializing products to ... need, announced today that it will be hosting an ... am ET on the origins of innate defense regulators ... a review of oral mucositis and the recently announced ...
(Date:12/8/2016)... Savannah River Remediation LLC group evaluated ... NT-MAX Lake & Pond Sludge and Muck ... conjunction with Hexa Armor/ Rhombo cover manufactured by ... Discharge Elimination System requirements. The Savannah ... of elevated pH levels, above 8.5, especially during ...
(Date:12/8/2016)... Dec. 8, 2016  Partnering to fuel ... Technology Partners of Southeastern Pennsylvania ... parent company of Independence Blue Cross; and Safeguard Scientifics ... intentions for a $6 million funding initiative over a ... Responding to a burgeoning economic vitality in ...
(Date:12/7/2016)... , ... December 07, 2016 , ... ... its phase I/II dose escalation and expansion clinical trial for its lead drug ... Austria. The purpose of the trial was to determine the safety, antitumor activity, ...
Breaking Biology Technology: