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:10/25/2014)... 2014 Research and Markets  has announced ... 2014-2018" report to their offering. ... on the basis of their physical or behavioral patterns. ... traits such as fingerprints, face recognition, DNA, palm print, ... as keystroke patterns and speech pattern/voice recognition. ...
(Date:10/22/2014)... 21, 2014 Aware, Inc. (NASDAQ: AWRE ... reported financial results for its third quarter ended September 30, ... was $6.0 million, an increase of 40% compared to $4.3 ... the third quarter of 2014 was $4.1 million compared to ... income in the current three month period was primarily due ...
(Date:10/18/2014)... sample of patients with undiagnosed, suspected genetic conditions, a ... a higher molecular diagnostic yield than traditional molecular diagnostic ... . The study is being released to coincide with ... Exome sequencing, which sequences the protein­coding region of the ... present in a cell or organism), has been rapidly ...
Breaking Biology News(10 mins):Biometrics Market in Europe 2014-2018: Key Vendors are 3M Cogent, Cognitec, NEC and Safran 2Biometrics Market in Europe 2014-2018: Key Vendors are 3M Cogent, Cognitec, NEC and Safran 3Aware, Inc. Reports Third Quarter 2014 Financial Results 2Aware, Inc. Reports Third Quarter 2014 Financial Results 3Aware, Inc. Reports Third Quarter 2014 Financial Results 4Aware, Inc. Reports Third Quarter 2014 Financial Results 5Aware, Inc. Reports Third Quarter 2014 Financial Results 6Aware, Inc. Reports Third Quarter 2014 Financial Results 7Study examines type of exome sequencing and molecular diagnostic yield 2Study examines type of exome sequencing and molecular diagnostic yield 3
... MADISON Failing to see the forest for ... declining health of Wisconsin,s forest ecosystems. Even areas ... as forests are increasingly fragmented by roads and development, ... fields, housing tracts, and strip malls, say University of ...
... rings are acclaimed in representing natural climate archives. ... growth of these annual rings depend mainly on temperature ... slight seasonal variations, the correlation is not so ... for Geosciences and their colleagues of the Australian National ...
... Versartis, Inc., an emerging company developing novel biologics ... presented data for its long-acting product candidates, VRS-317 (hGH-rPEG) ... (IL-1ra-rPEG) for treatment of type 1 and type 2 ... DC. Versartis, through a unique licensing agreement with Amunix, ...
Cached Biology News:Isolated forest patches lose species, diversity 2Isolated forest patches lose species, diversity 3Australia's climate: Drought and flooding in annual rings of tropical trees 2Versartis presents positive preclinical data on 2 product candidates at ENDO 09 2
(Date:10/25/2014)... (PRWEB) October 24, 2014 This ... PHA, PBS, Starch Based Plastics, Regenerated Cellulose, PCL), ... Global Trends and Forecasts to 2019”, defines and ... analysis and forecast of its global volume and ... 54 Figures spread through 178 Slides and in-depth ...
(Date:10/25/2014)... SonaCare Medical, LLC, leader in ... announced that its Board of Directors has appointed ... President and member of the Board effective immediately. ... expanded responsibilities within the company, including further developing ... commercialization, manufacturing and finance. , Dr. Carol ...
(Date:10/25/2014)... 2014 Berkshire Corporation, the world ... announce the release of the ValuSeal® IonX™ cleanroom ... contamination containment in critical processing applications. , Recommended ... cleanroom environments, ValuSeal® IonX™ is a laser sealed ... that continues Berkshire’s innovative focus on meeting new ...
(Date:10/25/2014)... YORK , Oct. 24, 2014 ... Inc. (ACCP), a biopharmaceutical company advancing patient care ... 1-for-50 reverse split of its common stock effective ... 24, 2014. PlasmaTech,s common stock will trade on ... and temporary ticker symbol "ACCPD". After 20 days, ...
Breaking Biology Technology:Biodegradable Plastics Market Projected to $3,476.87 Million by 2019 - Report by MarketsandMarkets 2Biodegradable Plastics Market Projected to $3,476.87 Million by 2019 - Report by MarketsandMarkets 3Biodegradable Plastics Market Projected to $3,476.87 Million by 2019 - Report by MarketsandMarkets 4SonaCare Medical Board of Directors Appoints Dr. Mark Carol as CEO and President 2SonaCare Medical Board of Directors Appoints Dr. Mark Carol as CEO and President 3Ions Are Bygones, Berkshire Announces the Release of New Innovative Cleanroom Wipers 2PlasmaTech Biopharmaceuticals, Inc. Announces Reverse Stock Split, Ticker Change and Launches New Corporate Website 2
... , , , , Multiporator / Electroporator 2510 , , , , ... Transformation Protocol , Protocol No. 4308 915.509 12/2001 , ... , , , , ... , Cell type , Bacteria, gram positive, ...
... , , , , , , , , ... Protocol No. 4308 915.508 12/2001 , , , , , ... , Microorganism , Brucella abortus, ... Bacteria, gram negative, , , ...
... , , , , , , Multiporator / Electroporator 2510 , , ... , Transformation Protocol , Protocol No. 4308 ... , , , , , , ... , , Cell type , ...
Cached Biology Technology:Clostridium botulinum 2Brucella abortus 2Agrobacterium tumefaciens 2
Acetate Plate Sealers 100/Box...
QCPN...
... The new MALDI O-TOF creates a new ... an orthogonal platform that has been licensed ... University of Manitoba. , As the first ... design and collisional cooling, the prOTOF 2000 ...
Rat Aortic Endothelial Cells (RAOEC) (>500,000 cells)...
Biology Products: