Navigation Links
Reproductive plasticity revealed: Neotropical treefrog can choose to lay eggs in water or on land
Date:5/19/2008

(Boston) When frogs reproduce, like all vertebrates, they either lay their eggs in water or on land with one exception, according to new research by a team of Boston University scientists who discovered a treefrog (Dendropsophus ebraccatus) in Panama that reproduces both ways. The neotropical frog makes a behavioral decision to lay egg masses aquatically in a pond or terrestrially on the overhanging plants above a pond, where the newly-hatched tadpoles simply fall into the water.

The dual reproductive capabilities enable this species of tree frogs to choose the best environment for egg development avoiding either aquatic predators or the hot tropical sunlight that dries out the eggs. In two shady forest ponds the mating frogs laid terrestrial egg masses, as expected from previous research. In a third pond in an old gravel quarry without a forest canopy, the vast majority -- 76 percent -- of the eggs were laid in water, supported by aquatic vegetation. The remaining 24 percent were on leaves above the pond, although the mortality rate of these eggs was high due to the heat and lack of shade.

The study, Reproductive Mode Plasticity: Aquatic and Terrestrial Oviposition in a Treefrog, by BU graduate student Justin C. Touchon and Assistant Professor of Biology Karen M. Warkentin appears in the Proceedings of the National Academy of Science (PNAS) online this week.

To test if genetic differences made frogs lay eggs in water or on land, or if instead their different environments affected egg-laying choices, Touchon and Warkentin built miniature ponds in an open field and in the forest. When they placed pairs of mating treefrogs in the shaded ponds, the frogs laid eggs on leaves above the water. In unshaded ponds, however, frogs put most of their eggs in the water.

Although this frog is the first vertebrate discovered to show reproductive flexibility, Touchon and Warkentin emphasize that it is probably not alone. The way an ani
'/>"/>

Contact: Ronald Rosenberg
ronrosen@bu.edu
617-358-1240
Boston University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Physician-scientists seek solutions to reproductive problems related to chromosomal variations
2. Study identifies pathway required for normal reproductive development
3. Study finds Viagra increases release of key reproductive hormone
4. New folic acid seal helps women choose enriched grain foods to help prevent birth defects
5. Estuarine Research Federation chooses Springer as publishing partner
6. Species still have more viable offspring if they can choose their best mate
7. Institution of Chemical Engineers chooses Elsevier as publishing partner
8. NOAA reports coastal waters show decline in contaminants
9. Biodiversity -- its in the water
10. Environmental fate of nanoparticles depends on properties of water carrying them
11. Freshwater herring had salty origin
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/9/2014)... co-authored by a University of Guelph scientist that ... shows long-term exposure to a neonicotinoid pesticide hampers ... research by Nigel Raine, a professor in Guelph,s ... Imperial College London was published July 9 in ... . , The study shows how long-term pesticide ...
(Date:7/9/2014)... fever but often can be defeated with antibiotics and ... beat. Now, scientists have built a new weapon against such ... the journal ACS Applied Materials & Interfaces , their ... of them than medicine alone. , David Leong, Jianping Xie ... wait, undetectable in the human body or in places that ...
(Date:7/9/2014)... developed by researchers at the NIH,s National ... its collaborators to treat sickle cell disease ... business. The drug candidate, Aes-103, is the ... molecular mechanism of sickle cell disease. Baxter ... required for regulatory approval and commercialization. , ...
Breaking Biology News(10 mins):Bee foraging chronically impaired by pesticide exposure: Study 2First drug candidate from NIH program acquired by biopharmaceutical company 2First drug candidate from NIH program acquired by biopharmaceutical company 3First drug candidate from NIH program acquired by biopharmaceutical company 4
... Adoptive cell transfer (ACT) therapy is used to treat patients ... of the patient's cancer cells, and some of their immune ... of the cancer cells that stimulate the T cells to ... get expanded and re-infused into the patient to mount an ...
... pandemic influenza, a new study reports for the first time ... from poultry to humans. The research appears in the ... available online. , Crossing the species barrier is an important ... potential. Previous studies have focused on the ability of highly ...
... many scientists thought, genetically modified (GM) corn has not ... , After analyzing tens of thousands of seeds from ... Mexico and the United States found no evidence of ... the researchers, said Allison Snow, a professor of evolution, ...
Cached Biology News:First Whole Genome Map of Genetic Variability in Parkinson’s Disease 2Genetically modified maize not found in southern Mexico 2
(Date:1/15/2014)... 2014 Look inside the new Preferred ... the lab, from fluid handling to instruments to supplies. ... when you order. , Preferred Solutions features a ... the L/S® model for precise flow control and dispensing ...
(Date:1/15/2014)... January 15, 2014 A study has been ... the Formula 1 track could help to tackle the problem ... (MAT), Stowhealth (a GP surgery based in Stowmarket) and academics ... Simplyhealth. Telemetry technology, which is inspired by equipment ...
(Date:1/15/2014)... 2013 was a banner year of continued ... saw continued independent research led by the team at ... $1 million grant from the Susanne Marcus Collins Foundation, ... peer reviewed journal, Amy Grant highlighted Brainwave Optimization® in ...
(Date:1/14/2014)... 14, 2014 Carahsoft and CDS Federal ... 23, 2014 at 2pm EST (11am PST), “Natural Language ... focuses on how technology can turn raw, heterogeneous data ... government agencies. The online webinar will last approximately one ...
Breaking Biology Technology:Cole-Parmer Begins 2014 with the Release of Preferred Solutions 2Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 2Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 4Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 2Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 3Webcast - Natural Language Processing: Converting Raw Data into Actionable Knowledge – Hosted by Carahsoft and CDS Federal Services 2
... PfuTurbo and Taq DNA Polymerases ,,,, pfuturbo ... PCR amplification , , Holly Hogrefe ... In this update, we compare the PCR performances ... DNA polymerase. ,PCR product yields were higher ...
... mutagenesis in less than one day , ... 28-base insertion was introduced into a plasmid vector ... created three unique restriction enzyme digestion sites. Plasmid ... transformed clones were digested with,all 3 restriction enzymes, ...
... Studying Signal Transduction,Pathways ,,,,, Obtaining the best ... ,in vivo reporting systems , Tim Sanchez ... Zheng ,Stratagene , Stratagenes PathDetect ... are used to study,activation of specific signaling pathways ...
Cached Biology Technology:PCR Performance Comparisons Between pfuturbo and Taq DNA,Polymerases 2PCR Performance Comparisons Between pfuturbo and Taq DNA,Polymerases 3PCR Performance Comparisons Between pfuturbo and Taq DNA,Polymerases 4Efficiently Insert Unique Restriction Sites into Plasmid Vectors 2Efficiently Insert Unique Restriction Sites into Plasmid Vectors 3Optimizing Transfection Conditions for Studying Signal Transduction Pathways 2Optimizing Transfection Conditions for Studying Signal Transduction Pathways 3Optimizing Transfection Conditions for Studying Signal Transduction Pathways 4Optimizing Transfection Conditions for Studying Signal Transduction Pathways 5Optimizing Transfection Conditions for Studying Signal Transduction Pathways 6Optimizing Transfection Conditions for Studying Signal Transduction Pathways 7
... ,Yeast extract, 5 ,Sodium chloride, 10 ... citrate, 0.5 ,IPTG, 0.03 ,-Gal ... chromogenic substrate for -galactosidase. The enzymatic ... a black insoluble precipitate. Lac+ colonies ...
... Polyclonal Antibody Epitope: aa 16-25 of ... Recommended Storage: Store vial at -20 ... use. For extended storage aliquot contents and freeze at -20 ... Family: Other Sub-Family: ...
S-100 alpha/beta chain (8B10)...
... Acetate: CoA ligase (AMP forming), Acetate ... on protein content. Physical form: ... sucrose and reduced glutathione Preparation ... mol of S-acetyl coenzyme A from acetate, ...
Biology Products: