Navigation Links
Colorful view for first land animals
Date:10/24/2007

When prehistoric fish made their first forays onto land, what did they see" According to a study published in the online open access journal, BMC Evolutionary Biology, it's likely that creatures venturing out of the depths viewed their new environment in full colour.

A team led by Helena Bailes at the School of Biomedical Sciences, University of Queensland, Brisbane, Australia, analysed retinas from Australian lungfish (Neoceratodus forsteri), thought to be the closest living relative to the first terrestrial vertebrates. The researchers then compared these to other fish and amphibian retinas. The DNA of five visual pigment (opsin) genes in the retinas of lungfish reveals that these have more in common with four-legged vertebrates (tetrapods) than with fish retinas.

Although lungfish mainly take in oxygen through their gills like most fish, they can also breathe air if water quality is poor. Lungfish were previously thought to have poor eyesight due to their small eyes, low spatial resolving power, sluggish behaviour in captivity and ability to detect prey using electroreception. N.forsteri inhabits a brightly lit, shallow freshwater habitat similar to the environment from which terrestrial evolution probably occurred. This prompted the team to investigate the complement of opsins expressed in N. forsteri, to trace photoreception's evolution in ancestral tetrapods.

The study paves the way for behavioural work with lungfish to see if they can discriminate between objects based on colour.

"The genus Neoceratodus, of which N. forsteri is the sole survivor, is found in the fossil record from the Lower Cretaceous period 135 million years ago and therefore N. forsteri lays claim to being the oldest surviving vertebrate genus," says Bailes. "The visual system of N. forsteri may represent an evolutionary design most closely reflecting that present just prior to the emergence of land vertebrates in the Devonian period."


'/>"/>

Contact: Charlotte Webber
press@biomedcentral.com
44-020-763-19980
BioMed Central
Source:Eurekalert

Page: 1

Related biology news :

1. Colorful bacteria more dangerous
2. Mushrooms as good an antioxidant source as more colorful veggies
3. A genes first kiss sets off that affair known as puberty
4. Timing is everything: First step in protein building revealed
5. Emory Eye Center Implants Its First Retinal Chips In Patients With Retinitis Pigmentosa
6. First atlas of key brain genes could speed research on cancer, neurological diseases
7. First-ever Compounds To Target Only Metastatic Cells Are Highly Effective Against Breast, Prostate, And Colon Cancers
8. NYCs First Rapid HIV Drug-resistant AIDS Case Prompts Call to Step Up HIV Prevention
9. First real-time view of developing neurons reveals surprises, say Stanford researchers
10. Love at first smell
11. Worlds largest rainforest drying experiment completes first phase
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/28/2014)... showing signs of damage from the Deepwater Horizon oil spill ... Gulf of Mexico. The discovery was made by a team ... University. A paper describing this work and additional impacts of ... be published during the last week of July 2014 in ... the National Academy of Sciences . , "The footprint of ...
(Date:7/28/2014)... people in the United States have a circulatory problem ... be painful and may even require surgery in serious ... wasting and, in turn, limb amputation. , At The ... Medical School, scientists tested a non-surgical preventative treatment in ... associated with increased blood circulation. Their proof-of-concept study ...
(Date:7/28/2014)... pinpointed a mechanism in part of the brain that is ... to both type 1 and type 2 diabetes. The findings ... of the National Academies of Sciences . , "We,ve ... part of the hypothalamus known as the ventromedial nucleus ... levels in the blood," said lead author Sabrina Diano, professor ...
Breaking Biology News(10 mins):Impact of Deepwater Horizon oil spill on coral is deeper and broader than predicted 2Scientists discover genetic switch that can prevent peripheral vascular disease in mice 2Glucose 'control switch' in the brain key to both types of diabetes 2
... (UB) has analysed which facial features our brain examines to ... maximum amount of information possible from each face and according ... in the first place, the eyes and then the shape ... study, undertaken by researcher Matthias S. Keil from the Basic ...
... 20 July 2009: Research at the University of Liverpool has ... protect buildings from earthquakes. The seismic waves produced ... and surface waves which travel across it. The new technology ... damaging and responsible for much of the destruction which follows ...
... has a long history of healing power. Its ability to heal ... back as the 10th century. Legend has it that Cleopatra used ... aloe vera was first recognized the 1930s to heal radiation burns. ... heal sunburn, minor cuts, skin irritation, and many other ailments. Recently, ...
Cached Biology News:Our brain looks at eyes first to identify a face 2Our brain looks at eyes first to identify a face 3'Invisibility cloak' could protect against earthquakes 2Healing power of aloe vera proves beneficial for teeth and gums, too 2
(Date:7/29/2014)... 2014 “PharmaSphere: Emerging Biotech Investment ... Capital Funding” report provides in-depth analysis of the ... and venture capital segments of the financial industry, ... have significant impact on the future of emerging ... the report identifies regions of the world that ...
(Date:7/29/2014)... 2014 Human Longevity, Inc. (HLI), a genomics ... extending the healthy, high performance human life span, today ... an expert in machine learning and machine translation as ... from Google where he was Distinguished Research Scientist and ... to HLI Co-Founder and CEO, J. Craig Venter ...
(Date:7/29/2014)... 29, 2014  The Society for Clinical Research ... program for the 9 th annual Site ... Amelia Island , Florida.  The focus on ... unchanged, however, the topics and format will allow ... among all stakeholders with a continued focus on ...
(Date:7/29/2014)... July 29, 2014  Discovery Laboratories, Inc. (Nasdaq: ... a new standard of respiratory critical care, will report ... 5, 2014 before the open of the U.S. ... host a live teleconference and webcast at 9:00 a.m. ... call, Discovery Labs, management will discuss the 2014 ...
Breaking Biology Technology:Strategic Trends of Biotech Investment Industry (Private Equity and Venture Capital Funding) in New Report Available at MarketOptimizer.org 2Strategic Trends of Biotech Investment Industry (Private Equity and Venture Capital Funding) in New Report Available at MarketOptimizer.org 3Strategic Trends of Biotech Investment Industry (Private Equity and Venture Capital Funding) in New Report Available at MarketOptimizer.org 4Franz Och, Ph.D., Expert in Machine Learning and Machine Translation, Joins Human Longevity, Inc. as Chief Data Scientist 2Franz Och, Ph.D., Expert in Machine Learning and Machine Translation, Joins Human Longevity, Inc. as Chief Data Scientist 3TransCelerate, Lilly, Pfizer, and FDA Highlight Collaborative Program at the Site Solutions Summit 2TransCelerate, Lilly, Pfizer, and FDA Highlight Collaborative Program at the Site Solutions Summit 3Discovery Labs to Report 2014 Second Quarter Financial Results and Hold Conference Call on Tuesday, August 5, 2014 at 9:00 a.m. Eastern Time 2
... , SAN DIEGO, Aug. 6 SEQUENOM, Inc. ... ended June 30, 2009. , , (Logo: http://www.newscom.com/cgi-bin/prnh/20040415/SQNMLOGO ) , ... Total revenue for the second quarter of 2009 was $9.2 million, ... the comparable period last year was primarily due to softness in capital expenditure ...
... ... Launch Of Its New And Improved Website. The New Site Provides Users With A ... Functionality And Navigation. The Site Also Offers An Expanded Service Description For Each Of ... ...
... , , LOS ANGELES, Aug. 6 ... an 82 year-old Chinese female immigrant who suffered Stevens-Johnson Syndrome/Toxic Epidermal ... Defendant, an osteopathic physician and registered pharmacist, prescribed it to her ... did not have gout. The doctor claimed that she told ...
Cached Biology Technology:SEQUENOM Reports Second Quarter 2009 Financial Results and Highlights 2SEQUENOM Reports Second Quarter 2009 Financial Results and Highlights 3SEQUENOM Reports Second Quarter 2009 Financial Results and Highlights 4SEQUENOM Reports Second Quarter 2009 Financial Results and Highlights 5SEQUENOM Reports Second Quarter 2009 Financial Results and Highlights 6SEQUENOM Reports Second Quarter 2009 Financial Results and Highlights 7SEQUENOM Reports Second Quarter 2009 Financial Results and Highlights 8SEQUENOM Reports Second Quarter 2009 Financial Results and Highlights 9SEQUENOM Reports Second Quarter 2009 Financial Results and Highlights 10One of the Nation's Leading Analytical Testing Laboratories is Now Easier to Access -- Pace Analytical Launches New Web Site to Showcase Its Three Business Divisions 2The Law Offices of Brian D. Witzer Wins 6+ Million Dollar Verdict 2
...
BD BioCoat Poly-D-Lysine/Laminin 100 mm Culture Dishes, tissue-culture treated polystyrene with a uniform application of poly-D-lysine and laminin....
BD BioCoat Gelatin 100 mm Culture Dishes, tissue-culture treated polystyrene with a uniform application of gelatin....
... internal standard for the quantification of 5-OxoETE ... is a polyunsaturated keto acid formed by ... It stimulates cytosolic calcium levels in neutrophils ... selectively stimulates the migration and degranulation of ...
Biology Products: