Navigation Links
Mid-ocean creatures control light to avoid becoming snacks
Date:11/10/2011

DURHAM, NC -- If you're a snack-sized squid or octopus living in the ocean zone where the last bit of daylight gives way, having some control over your reflection could be a matter of life and death.

Most predators cruising 600 to 1,000 meters below the surface spot the silhouette of their prey against the light background above them. But others use searchlights mounted on their heads.

Being transparent and a little bit reflective is a good defense against the silhouette-spotters, but it would be deadly against the "headlight fish," says Duke postdoctoral researcher Sarah Zylinski.

Transparency is the default state of both Japetella heathi, a bulbous, short-armed, 3-inch octopus, and Onychoteuthis banksii, a 5-inch squid found at these depths. Viewed from below against the light background, these animals are as invisible as they can be. Their eyes and guts, which are impossible to make clear, are instead reflective. But when hit with a flash of bluish light like that produced by headlight fish, they turn on skin pigments, called chromatophores, to become red in the blink of an eye.

During ship-board experiments over the Peru-Chile trench in 2010, Zylinski shined blue-filtered LED light on specimens of both creatures to watch them rapidly go from clear to opaque. When the light was removed, they immediately reverted to transparent. On a second research cruise in 2011 in the Sea of Cortez, Zylinski measured the reflectivity of the octopuses and found they reflected twice as much light in their transparent state as in the opaque state.

Zylinski experimented with 15 to 20 different species of cephalopod pulled up from the deep by the research ships, but only these two responded to the blue light. "I went through several things I thought would stimulate behaviors," she says. Shallow-water cephalopods (squid, ocotopi and cuttlefish) will change their body patterns for a shadow or shape passing overhead, but these de
'/>"/>

Contact: Karl Leif Bates
karl.bates@duke.edu
919-681-8054
Duke University
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Researchers discover source of essential nutrients for mid-ocean algae
2. Snakes, salamanders and other creatures thrive in areas with higher deer populations
3. Sea creatures sex protein provides new insight into diabetes
4. Marine scientists return with rare creatures from the deep
5. Coastal creatures may have reduced ability to fight off infections in acidified oceans
6. Peacekeeping creatures help maintain woodland diversity
7. Run-off, emissions deliver double whammy to coastal marine creatures, UGA study finds
8. Hidden infections crucial to understanding, controlling disease outbreaks
9. bioMETRX, Inc. Signs Deal To Acquire Controlling Interest in Biometric Solutions, LLC
10. Can genetic information be controlled by light?
11. Genes that control cell death fingered in age-related hearing loss
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Mid-ocean creatures control light to avoid becoming snacks
(Date:7/22/2014)... DURHAM, N.C. In a cost-effectiveness analysis of commercial ... the drug Qsymia showed the best value for the ... loss, but was also the most expensive option tested, ... Graduate Medical School. , The findings, published in the ... important information on the health and weight-loss benefits per ...
(Date:7/22/2014)... NEW YORK, NY -- As part of a multinational, ... at Mount Sinai have helped identify over 100 locations ... developing schizophrenia, in the largest genomic study published on ... The findings, published online in Nature , point ... and could lead to new approaches to treating the ...
(Date:7/22/2014)... have adapted to New York City,s human behaviour, allowing ... than their fellow squirrels in the woods. , Dr ... & Agriculture, led the study that proved eastern grey ... environments and prevent unnecessary responses when humans acted in ... , "As we rapidly increase the spread of ...
Breaking Biology News(10 mins):Study compares cost-effectiveness of weight-loss programs and drugs 2Study compares cost-effectiveness of weight-loss programs and drugs 3Mount Sinai scientists and international team shed new light on schizophrenia 2Mount Sinai scientists and international team shed new light on schizophrenia 3New York squirrels are nuts about city life 2
... natural coal deposits in the Gulf of Alaska are ... Exxon Valdez tanker catastrophe. This clearly disproves the theory ... environmental damage. PAH pollutants were blamed for the continuing ... Then a dispute erupted over the origins of these ...
... Pasadena, Calif.In a finding that sheds new light on ... the California Institute of Technology (Caltech) have pinpointed the ... The discovery, described in the August 30 ... offer insight into autism and other disorders where social ...
... and some amphibians possess a unique sensory capability in ... to "touch" objects in their surroundings without direct physical ... van Hermmen and his team in the physics department ... basis for this sensory system. What they discover might ...
Cached Biology News:Bioavailable contaminants come from the Exxon Valdez oil catastrophe 2Caltech neuroscientists find brain region responsible for our sense of personal space 2Caltech neuroscientists find brain region responsible for our sense of personal space 3Caltech neuroscientists find brain region responsible for our sense of personal space 4Mathematical keys to a sixth sense -- the lateral-line system 2Mathematical keys to a sixth sense -- the lateral-line system 3Mathematical keys to a sixth sense -- the lateral-line system 4
(Date:7/23/2014)... With the ability to record continuously at ... than 15 minutes, Fastec Imaging has brought the same ease-of-use ... imaging. “Finally, a high speed camera that can be used ... everyday lives.” proclaims Matt Kearney, VP of Sales for Fastec ... demystify and simplify the traditionally complicated workflow of a high ...
(Date:7/22/2014)... Web) July 21, 2014 (PRWEB) July 23, 2014 ... Biomaterials, at Rutgers University. , The goal ... ideas across the full spectrum of scientists working ... research and development topics that represent the most ... been programmed to:,     Provide faculty ...
(Date:7/22/2014)... lecturer in mechanical engineering at the University of Texas ... by the North Texas section of the American Society ... 130,000 members in 158 countries who develop engineering standards ... engineering community, benefiting the world. , ASME recognized Baughn ... Engineers honors banquet. Baughn retired as an engineering fellow ...
(Date:7/22/2014)... Lake, Wisconsin (PRWEB) July 22, 2014 ... be in attendance at the 2014 NCSL International ... Booth #423 will feature CONDEC pressure instrumentation, ... style weights, and the new, customized sets, Essential ... ago to promote cooperative efforts in solving the ...
Breaking Biology Technology:Fastec Imaging Introduces the First High Speed Camcorder 2Fastec Imaging Introduces the First High Speed Camcorder 3The 2014 NJ Symposium on Biomaterials Science Earns Society for Biomaterials Endorsement 2UT Dallas professor receives Engineer of the Year award 2Rice Lake Weighing Systems Showcases Metrology Solutions for the 2014 NCSL International Workshop & Symposium 2
... , , , JEFFERSON, N.C., ... give people more confidence to go to work in a pandemic ... products the company developed for the bird flu influenza A subtype ... for the bird flu (H5N1), which never became contagious. The Next ...
... , , SEATTLE, Aug. ... Stephen R. Murray, M.D., Ph.D. as Vice President of ... and protocols at Omeros, and currently is leading the ... include OMS103HP, the Company,s lead candidate being evaluated in ...
... , ... pleased to announce that SK Life Science, Inc. (SKLSI), has licensed Pristima for its Research ... ... a world leader in toxicology and pathology data management solutions and the developer of Pristima™ ...
Cached Biology Technology:Next Safety Releases Advanced Respirator for Infectious Diseases 2Next Safety Releases Advanced Respirator for Infectious Diseases 3Omeros Appoints New Vice President of Clinical Development 2SK Life Sciences has Licensed Pristima 2
Evolutionarily conserved signaling intermediate in Toll pathway...
Phosphatidylinositol transfer protein beta isoform (PtdIns transfer protein beta) (PtdInsTP) (PI-TP-beta). [Source:Uniprot/SWISSPROT;Acc:P48739] Antigen: Recombinant Protein Epitope Signature Tag...
Mouse monoclonal [88B] to nicotinic Acetylcholine Receptor ( Abpromise for all tested applications)....
PPIF Antibody...
Biology Products: