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:1/20/2016)... 20, 2016  Synaptics Incorporated (NASDAQ: SYNA ... today announced sampling of S1423, its newest ClearPad ... small screen applications including smartwatches, fitness trackers, and ... and rectangular shapes, as well as thick and ... moisture on screen, while wearing gloves, and supports ...
(Date:1/11/2016)... , Jan. 11, 2016 Synaptics Incorporated ... interface solutions, today announced that its ClearPad ® ... (TDDI) products won two separate categories in the 8 ... Innovator and Best Technology Breakthrough. The Synaptics ® ... a simplified supply chain, thinner devices, brighter displays and ...
(Date:1/7/2016)... Jan. 7, 2016 Various factors have ... products such as biologics and biosimilars. Some of ... healthcare expenditure, growing demand for cost-effective alternatives, growing ... Biosimilars are similar versions of their corresponding patented ... their quality, safety, and efficacy. The global biosimilars ...
Breaking Biology News(10 mins):
(Date:2/5/2016)... , Feb. 5, 2016  In the pharmaceutical ... for a host of launch activities including the identification ... this launch activity is especially high in the oncology ... Best Practices and the Role of Medical Affairs ... companies focused on oncology therapies find better ways to ...
(Date:2/4/2016)... CA (PRWEB) , ... February 04, 2016 , ... ... enterprise talent development and compliance training, today announced an interactive FDA compliance ... Playbook™. The RAPS (Regulatory Affairs Professional Society) accredited interactive course on Morf ...
(Date:2/4/2016)... ... February 04, 2016 , ... ... Club, takes place February 5-6 at the University’s student center, Kehr Union, ... such as workshops and competitions for ample networking, learning and collaborating opportunities. ...
(Date:2/4/2016)... -- --> --> Q ... to provide the following update on recent corporate developments. ... 3 months we have significantly increased our cash position through ... a result, we have positioned ourselves to execute on the ... expect that development to continue on schedule. ...
Breaking Biology Technology:
Cached News: