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:
TAG: Cuttlefish masters disguise despite colorblindness

(Date:5/20/2015)... -- NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or ... LLC, a company engaged in biometric identification is an ... portion of the recently awarded TIES (Technical Information Engineering ... Army. 3D-ID LLC has a suite of ... and security agencies. Gino Pereira , ...
(Date:5/18/2015)... , May 18, 2015 Fingerprint Cards ... FPC1020, FPC1025, FPC1145, FPC1155 and FPC1035 from one if its ... until and including Q3 2015 and the sensors will be ... Communicated order values for 2015 hereby amount to 740 MSEK ... 2015 of 140 MSEK and a number of smaller orders ...
(Date:5/11/2015)... May 11, 2015  Through a well-rounded UAS delegation representing ... had a strong showing at AUVSI,s Unmanned 2015 conference last ... Ohio,s UAS industry met with over ... all points along the UAS ecosystem. "Our ... Vice President for Aerospace Rich Knoll . "If you ...
Breaking Biology News(10 mins):NXT-ID, Inc Announces Participation as Member of Team Battelle for TIES Contract Award 2NXT-ID, Inc Announces Participation as Member of Team Battelle for TIES Contract Award 3Fingerprint Cards Receives Touch Fingerprint Sensor Order of SEK 230 Million and Raises Revenue Guidance for 2015 2Ohio Flies High at Unmanned '15, Sets Stage for Ohio UAS Conference 2
(Date:5/28/2015)... 28, 2015 ... announced the addition of Jain PharmaBiotech,s ... Markets and Companies"  to their offering.  ... describes and evaluates animal biotechnology and ... pharmaceuticals as well as improvement in ...
(Date:5/28/2015)... 2015 The Academy of Model Aeronautics Foundation ... on August 15, 2015. National Model Aviation Day was created ... introduce model flying to the general public. , The AMA ... participate in the celebration by hosting events in their own ... Model Aviation Day events. View our online event map ...
(Date:5/28/2015)... , May 28, 2015  PDS Biotechnology Corp. ... immunotherapy treatment targeting HPV-16, has generated strong T-cell ... Currently, pre-cervical cancer is treated by surgical removal ... and effective non-surgical alternative. Results show that it ... to recognize, target, and kill precancerous and cancerous ...
(Date:5/28/2015)... Fertility Centers of New England is proud to announce ... a new and expanded role as Medical Director. In ... and quality assurance for the practice. , “We are ... experienced reproductive endocrinologists,” said Fertility Centers of New England ... and compassionate, individualized care have helped set FCNE apart ...
Breaking Biology Technology:Global Animal Biotechnology Report 2015 - Technologies, Markets and Companies Analysis to 2024 2Global Animal Biotechnology Report 2015 - Technologies, Markets and Companies Analysis to 2024 3Model flying pilots celebrate the Academy of Model Aeronautics Foundation’s Third Annual National Model Aviation Day 2PDS Biotechnology reports positive Phase I clinical trial results in proprietary HPV-Cancer Immunotherapy 2Danielle Vitiello, MD of Fertility Centers of New England, Named New Medical Director 2
Cached News: