HOME >> BIOLOGY >> NEWS
Cuttlefish masters of disguise despite colorblindness

WOODS HOLE, MA--Cuttlefish are wizards of camouflage. Adept at blending in with their surroundings, cuttlefish are known to have a diverse range of body patterns and can switch between them almost instantaneously. New research from MBL Marine Resources scientists, to appear in the May 2006 issue of the journal Vision Research, confirms that while these masters of disguise change their appearance based on visual cues, they do so while being completely colorblind.

While previous research has reported cuttlefish colorblindness, MBL Research Associate Lydia Mthger and her colleagues in Roger Hanlon's laboratory approached the problem in more depth and with a new behavioral assay. The researchers tested cuttlefish (Sepia officinalis) color perception through observing the animal's behavioral response to a series of checkerboard patterned substrates of various colors and brightnesses.

They found that the animals did not respond to the checkerboard pattern when placed on substrates whose color intensities were matched to the Sepia visual system, suggesting that these checkerboards appeared to their eyes as uniform backgrounds. However, their results showed that cuttlefish were able to detect contrast differences of at least 15%, which Mthger and her colleagues suspect might be a critical factor in uncovering what determines camouflage patterning in cuttlefish.

Despite these results, the vexing question of how cuttlefish master the task of camouflage in low-contrast, color-rich environments such as those found at shallow depths of water, remains to be answered. Mthger and her colleagues are currently looking at cuttlefish contrast sensitivity in more detail. "Our result that cuttlefish are able to detect contrast differences of at least 15%, is only an upper limit," says Mthger. "It's certainly not the contrast threshold, which we would like to know. It seems that cuttlefish camouflage themselves by matching intensities of objects in the environment
'"/>

Contact: Gina Hebert
ghebert@mbl.edu
508-289-7725
Marine Biological Laboratory
18-Apr-2006


Page: 1 2

Related biology news :

1. New data reveal pregnancies exposed to accutane despite risk management program
2. Penn researchers report that gene therapy awakens the brain despite blindness from birth
3. Treatment disconnect in kidney cancer: Rising mortality despite more small tumors, more surgery
4. Creative economy grows despite large population growth of creative people
5. Chewing up a key regulator of fat synthesis keeps mice lean despite a high-fat diet
6. Rhinos clinging to survival in the heart of Borneo, despite poaching
7. Genetic testing still smart choice, despite uncertainties
8. Low-income pregnant Latinas drink despite universal alcohol-warning messages
9. NSAID drug protects against intestinal tumors in mice, despite poor diet and gene losses
10. Study by US, Hebrew University scientists sheds light on how bacteria persist despite antibiotics
11. Mice thrive despite massive genetic makeover

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:2/3/2017)... -- Texas Biomedical Research Institute announced that its Board of Trustees ... the Institute,s new President and CEO. Dr. Schlesinger will take ... is currently the Chair of the Department of Microbial Infection ... Biology at Ohio State University. "We are delighted ... of Texas Biomed," said Dr. James O. Rubin , ...
(Date:2/1/2017)... , February 1, 2017 IDTechEx Research, a ... emerging technology, announces the availability of a new report, Sensors ... Continue Reading ... ... and collaborative robots. Source: IDTechEx Report "Sensors for Robotics: Technologies, Markets ...
(Date:1/25/2017)... , Jan. 25, 2017 The Elements ... Management (IAM) lifecycle is comprised of a comprehensive ... the purpose of maintaining digital identities and providing ... and applications. There are significant number of programs ... time to time by optimizing processes and changing ...
Breaking Biology News(10 mins):
(Date:2/20/2017)... Kingdom (PRWEB) , ... February 20, 2017 , ... ... manufactures industrial metal detection solutions for the food and pharmaceutical processing and packaging ... award goes to the manufacturer that has done the most or taken the ...
(Date:2/20/2017)... ... February 20, 2017 , ... PuraCath Medical, an emerging ... dialysis, announced today that it has published the result of its recent research ... International (PDI), the official Journal of the International Society for Peritoneal Dialysis ...
(Date:2/19/2017)... ... 2017 , ... Expanding Portfolio to Include Lab Equipment and ... the goal of expanding the reach of its quality and precision to additional ... meters were introduced into the market in 2014. , The OHAUS Starter Series ...
(Date:2/18/2017)... Research and Markets has announced the addition of the ... offering. ... report provides separate comprehensive analytics for the US, Japan ... Annual estimates and forecasts are provided for the period 2015 through ... Market data and analytics are derived from primary and secondary research. ...
Breaking Biology Technology:
Cached News: