Navigation Links
Green poison-dart frog varies mating call to suit situation
Date:11/11/2013

In the eyes of a female poison-dart frog, a red male isn't much brighter than a green one. This does not however mean that the mating behavior of the green and red variants of the same species of frog is exactly the same. A study in Springer's journal Behavioral Ecology and Sociobiology, led by Beatriz Willink of the Universidad de Costa Rica in Costa Rica, sheds light on these findings.

The bright colors of poison-dart frogs serve not only to attract potential mates, but also to warn possible predators such as birds that these amphibians are poisonous. Different color variants within the same species occur, such as in the granular poison frog (Oophaga granulifera) of the southwestern lowlands of Costa Rica, where yellow and green color morphs have evolved from red ancestors.

Willink and her colleagues wanted to test if the green variants of the granular poison frog were more or less conspicuous to potential mates and predators than red ones of the same species. Therefore, they measured how the skin of the frogs contrasted with their natural background. This was done because dorsal brightness is known to influence female preferences in at least one poison frog species. The calling activity of 12 red and 10 green male frogs was also noted to determine if green males adjust their display behavior according to the availability of potential mates.

The results show that the green frogs, despite being less visible in some cases, may appear as bright as red frogs to members of their own species - but not to birds - when they are viewed on dark backgrounds.

Green frogs therefore seem to adjust their sexual behavior accordingly: They can deliver relatively conspicuous signals to females while being less conspicuous to potential predators. The researchers found that green males called less frequently than red males when advertising to distant females. However, their calling activity dramatically increased when a female was near and they became as vocal as red males. In the right context, when mating opportunity is certain, green males appear to trade-off the risk of predation for the mate-securing benefits of bold behavior.

"Our results support the notion that populations of phenotypically or observably different divergent species may use different solutions to the trade-off between natural and sexual selection, by adjusting the place and time of displays to risks and opportunities," says Willink. "In poison frogs this may have contributed to the dramatic variation in color pattern conspicuousness observed across species."


'/>"/>

Contact: Renate Bayaz
renate.bayaz@springer.com
49-622-148-78531
Springer
Source:Eurekalert  

Related biology news :

1. Companies close to reusing the greenhouse gas carbon dioxide
2. MIT Portugal is a partner of 2 projects distinguished by the Green Project Awards
3. As world sets new development goals, Malaysia calls for poverty relief within green agenda
4. Green flame moths: Scientists discover 2 new Limacodidae species from China and Taiwan
5. Green algae move to the beat
6. Team uses forest waste to develop cheaper, greener supercapacitors
7. Walgreens Mike Ellis Named First President of National Association of Specialty Pharmacy (NASP)
8. Turfgrass tested in shallow green roof substrates
9. QUT develops software to reduce greenhouse gases
10. Green photon beams more agile than optical tweezers
11. A greener, more sustainable source of ingredients for widely used plastics
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Green poison-dart frog varies mating call to suit situation
(Date:6/22/2016)... June 22, 2016   Acuant , ... verification solutions, has partnered with RightCrowd ® ... for Visitor Management, Self-Service Kiosks and Continuous ... that add functional enhancements to existing physical ... and venues with an automated ID verification ...
(Date:6/16/2016)... June 16, 2016 The ... expected to reach USD 1.83 billion by 2024, ... Research, Inc. Technological proliferation and increasing demand in ... expected to drive the market growth. ... The development of advanced multimodal techniques for ...
(Date:6/7/2016)... -- Syngrafii Inc. and San Antonio Credit Union (SACU) ... Syngrafii,s patented LongPen™ eSignature "Wet" solution into SACU,s ... in greater convenience for SACU members and operational ... document workflow and compliance requirements. Logo ... Highlights: ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... ... June 24, 2016 , ... While the majority of commercial spectrophotometers and fluorometers ... the 6000i models are higher end machines that use the more unconventional z-dimension of ... beam from the bottom of the cuvette holder. , FireflySci has developed several ...
(Date:6/23/2016)... TORONTO , June 23, 2016 /PRNewswire/ - ... Ontario biotechnology company, Propellon ... the development and commercialization of a portfolio of ... cancers. Epigenetic targets such as WDR5 represent an ... contribute significantly in precision medicine for cancer patients. ...
(Date:6/23/2016)... YORK , June, 23, 2016  The Biodesign ... to envision new ways to harness living systems and ... Modern Art (MoMA) in New York City ... than 130 participating students, showcased projects at MoMA,s Celeste ... Paola Antonelli , MoMA,s senior curator of architecture ...
(Date:6/23/2016)... Apellis Pharmaceuticals, Inc. today announced positive ... its complement C3 inhibitor, APL-2. The trials were ... studies designed to assess the safety, tolerability, pharmacokinetics ... healthy adult volunteers. Forty subjects were ... dose (ranging from 45 to 1,440mg) or repeated ...
Breaking Biology Technology: