Alahednews
english.alahednews.com.lb
Al-Ahed Telegram
Merkel in Washington for Talks with Trump North Korea’s Kim Shakes Hands with Moon, Tells Him Missile Tests Will No Longer Interrupt His Sleep UK’s ’Heart Goes Out’ to Wedding Guests Killed by Saudi Bombs - But It Won’t Stop Selling Country Arms Boris Johnson «Saddened» that UK Weapons Were Used to Massacre Yemeni Civilians UN Chief Urges Preservation of JCPOA The Douma Hoax China Sends New Bombers around Taiwan in another Show of Force Zimbabwe: Opposition Party Slams Government’s ’Insufficient’ Assurance ’Genocide-Era’ Mass Graves Discovered In Rwanda Poll: US Voters Believe Mueller Likely to Find Trump Committed Crimes #Lebanese #Elections2018: Voting Process also Kicks Off in #Oman, #Emitrates and #Egypt #Lebanese #Elections2018: Voting Process Kicks Off in #SaudiArabia, #Qatar, #Kuwait Imam #Khamenei: The Islamic World should be unified to confront the #US Imam #Khamenei: The #US President says that some #Arab countries can't preserve themselves for more than a week Imam #Khamenei: Over the past years, we were able to confront the pressures of colonialism despite the will of the enemies Imam #Khamenei: Stupid Regimes in Some Countries are Waging Wars, Committing Crimes against Other Countries #EU's #Mogherini: #Iran #NuclearDeal «Needs To Be Preserved» #UK Minister: High Probability of A #Brexit Deal With #EU #Russia to Deliver New Air #Defense Systems to #Syria #Russian MoD: #OPCW Confirms Absence of Chemical Weapons in #Damascus Research Lab
Guestbook mailinglist.php arabic site french site spanish site facebook twitter rss page
News Categories » NEWS » Miscellaneous

Decrease Font Size Increase Font Size  Print Page
World’s First Fluorescent Amphibian!
Local Editor

A fluorescent frog, the world's first, had been identified by accident near Santa Fe in Argentina. The Hypsiboas Punctatus, informally named the South American polka dot tree frog, glows bright green under ultraviolet light. It joins a small, but vibrant band of creatures that secrete a luminous glow.

Polka dot tree frog

Under regular beams, the polka dot tree frog, a species common across Latin America, is aesthetically arresting enough - its exterior is daubed in a subtle blend of green, yellow and red. However, when the lights are dimmed and UV shines, the amphibian emits a pulsing blue and green glow.

Fluorescence - the ability to absorb light at short wavelengths, and re-emit it at longer wavelengths - is uncommon in terrestrial animals, but prior to now entirely unheard of in amphibians.

A team of scientists at the Buenos Aires Bernardino Rivadavia Natural Sciences Museum made the serendipitous discovery while studying the pigmentation of the frogs. The group initially believed the creatures might exhibit red fluorescence, as they contain a pigment called biliverdin. Typically, biliverdin turns an amphibian's tissues and bones green, although it can emit a red fluorescent glow in some forms of insect.

When the team shone a UV flashlight on polka dot tree frogs, they found the amphibians emitted an intense blue-green glow, instead of faint red. Further research indicates the glow is created by three fluorescent molecules [hyloin-L1, hyloin-L2 and hyloin-G1] in the frog's lymph tissue, skin and glandular secretions - they contain a ring structure and a chain of hydrocarbons. These molecules are so far said to be unique among known fluorescent particles in animals - although similar molecular properties can be found in plants.

The newly described fluorescent molecules emit an unprecedented amount of light, providing about 18 percent as much visible light as a full moon - enough for a related species of frog to see by. Little is presently known about the frog's visual system or photoreceptors, so the team intend to study these in detail to determine whether the frogs can use their fluorescence to see their environments and identify each other.

Because fluorescence requires the absorption of light, it by definition cannot occur in total darkness - this makes fluorescence distinct from bioluminescence, which allows organisms to emit light via internal chemical reactions. Many ocean creatures fluoresce, including coral, fish, sharks and the hawksbill turtle.

In terms of land creatures, fluorescence was previously exclusively detected in parrots, and some scorpions.

Scientists are yet to determine the exact purpose of this quality - although speculative explanations include attracting mates, camouflage and communication.

Source: News Agencies, Edited by website team

15-03-2017 | 14:41


Name
E-Mail
Comment Title
Comment
Human Verification


News Coverage

Related News

Search
To Top