Navigation Links
Giant squids' giant eyes: The better to see hungry whales with
Date:3/17/2012

It's no surprise that giant and colossal squid are big, but it's their eyes that are the real standouts when it comes to size, with diameters measuring two or three times that of any other animal. Now, researchers reporting online on March 15 in Current Biology, a Cell Press publication, have used complex computations to explain those massive peepers. Giant squids' 10-inch eyes allow them to see very large and hungry sperm whales from a distance in the pitch darkness of their deep-sea home.

According to the researchers' calculations, animals living underwater would have no use for such large eyes if the goal were to see an average object, such as prey smaller than themselves. That's why even the eyes of large whales aren't much more than 3.5 inches across.

"For seeing in dim light, a large eye is better than a small eye, simply because it picks up more light," said Dan-Eric Nilsson of Lund University. "But for animals that live in the sea or in lakes, the optical properties of water will severely restrict how far away things can be seen.

"Through complex computations we have found that for animals living in water, it does not pay to make eyes much bigger than an orange. Making eyes larger than that will only marginally improve vision, but eyes are expensive to build and maintain."

For Nilsson's team, that begged the question of why giant squid bother with their giant eyes. Using a mathematical model of underwater vision, they tested the benefits of very large eyes for a broad range of tasks under various light conditions. Those efforts showed that very large eyes aren't much better than smaller ones unless one wants to see something that is itself very big, like a whale.

Giant squid may also be unique in that they are powerful enough to escape a sperm whale once they've spotted one, Nilsson says. But how can giant squid see a sperm whale at depths beyond daylight's reach?

"The answer is biolumines
'/>"/>

Contact: Elisabeth (Lisa) Lyons
elyons@cell.com
617-386-2121
Cell Press
Source:Eurekalert  

Page: 1 2

Related biology news :

1. 1,000 tags reveal mysteries of giant bluefin tuna
2. Conservation International gets support from Dreamworks Animation to protect giant pandas
3. Discovery of giant roaming deep sea protist provides new perspective on animal evolution
4. Doubling a gene in corn results in giant biomass
5. Tall tale of giant stingray circles the globe
6. Doubling a gene in corn results in giant biomass
7. Scientists rebuild giant moa using ancient DNA
8. Report documents the risks of giant invasive snakes in the US
9. Canopy giants and miniature fungi among 250 new species discovered in Kews 250th anniversary year
10. Microorganism may provide key to combating giant salvinia throughout Louisiana
11. Giant panda genome reveals new insights into the bears bamboo diet
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Giant squids' giant eyes: The better to see hungry whales with
(Date:8/19/2014)... Aug. 19, 2014 To improve students, chances ... grades, the University of Houston (UH) implemented a ... students at risk for failure. , Through ... Board (THECB), the Department of Biology and Biochemistry ... students taking "General Biology" for non-majors and "Introductory ...
(Date:8/19/2014)... It,s not a monkey. It,s not a lemur. It,s not ... the Philippine tarsier: a tiny, adorable and downright "cool" primate ... that Americans are familiar with," said Rafe Brown, curator-in-charge at ... eyes and ears; an extremely cute, furry body; a long ... expanded fingers and toe tips that look a bit like ...
(Date:8/19/2014)... biomarker strongly associated with basal-like breast cancer, a ... types of chemotherapy. The biomarker, a protein called ... designed to treat this often deadly cancer. , ... Cancer Genome Atlas, molecular biologists Curt M. Horvath ... bioinformatics techniques to detect patterns of gene expression ...
Breaking Biology News(10 mins):University of Houson program earns kudos for improving grades, retaining students 2University of Houson program earns kudos for improving grades, retaining students 3Philippine tarsier gets boost from Kansas research, and genetic proof of a new variety 2Philippine tarsier gets boost from Kansas research, and genetic proof of a new variety 3Biomarker in an aggressive breast cancer is identified 2Biomarker in an aggressive breast cancer is identified 3
... Some soil microorganisms are capable of forging associations with ... these relationships play a highly important ecological and agronomic ... a fungus) thus gives plants a mechanism for improving ... has been in existence for 400 million years and ...
... Oregon State University graduate student working on a ... station on the Tahoe National Forest has photographed ... been confirmed in California since the 1920s. Katie ... on another carnivore called the American marten when ...
... defined biochemical pathway in plants may provide the scientific ... of alternative transportation fuels than currently can be produced, ... materials that determine cell shape and size through a ... geneticist and cellular biologist. By learning more about the ...
Cached Biology News:A common genetic mechanism discovered in nitrogen-fixing plants 2A common genetic mechanism discovered in nitrogen-fixing plants 3Scientists believe photograph depicts wolverine in California 2Newly defined signaling pathway could mean better biofuel sources 2Newly defined signaling pathway could mean better biofuel sources 3Newly defined signaling pathway could mean better biofuel sources 4
(Date:8/21/2014)... Boston, MA (PRWEB) August 21, 2014 ... collaboration company, has been recognized as one of ... 500 | 5000 magazine for the 2nd consecutive ... on its 33rd annual Inc. 500|5000, an exclusive ... list represents the most comprehensive look at the ...
(Date:8/20/2014)... An analysis of patented university inventions licensed to ... path to commercialization. To open these roadblocks, the ... results during the discovery stage could lead to ... are frequently derived from discoveries made in university ... well known during clinical trials, which have a ...
(Date:8/20/2014)... Fla. , Aug. 20, 2014 ... will host a conference call to provide an ... 2014Time:4:30 p.m. Eastern daylight timeDial-in numbers:(888) 505-4369 (U.S. ... 9126599 Live web cast: www.neurotropebioscience.com , under "Investor ... hours after completion through September 2, 2014 at ...
(Date:8/20/2014)... , Aug. 20, 2014  PAREXEL International Corporation (NASDAQ: ... be presenting at the Baird Healthcare Conference in New ... Chief Financial Officer, will be making a presentation on ... on Wednesday, Sept. 3, 2014. A live ... "Investors" section of PAREXEL,s website at www.PAREXEL.com ...
Breaking Biology Technology:SoundConnect Returns on Inc. 5000 List of Fastest Growing Companies 2SoundConnect Returns on Inc. 5000 List of Fastest Growing Companies 3Early bottlenecks in developing biopharmaceutical products delay commercialization 2Early bottlenecks in developing biopharmaceutical products delay commercialization 3Neurotrope To Host Conference Call 2PAREXEL International To Present At Baird Healthcare Conference 2
... reflection, and this one is no different. These last 12 months ... doubt look back on 2005 and pronounce it the year the ... of things, the previous four years were a standing eight count, ... like hell and a lot was lost on bad bets, but ...
... newsletter contains the most-read stories from our Web site in 2005. ... month to over 70,000 last month, many of them sticking around ... to what drew your interest. , ,Let me take a moment ... isnt until March 2 and were more than a third full ...
... care in the United States are enough to make anyone ... seven Americans (15.7 percent) lack health insurance. Thats just short ... federal figures, health spending accounts for 15.3 percent of the ... works out to $5,670 for each American. By 2013, the ...
Cached Biology Technology:2005: the year of the comeback 22005: the year of the comeback 3Health care economics make definition of 'cost' problems difficult 2Health care economics make definition of 'cost' problems difficult 3
The Zymo-Spin PI Fast-Spin column features durable polypropylene construction and is the same column featured in the His-Spin Protein Miniprep. Capacity is 800 l....
LAL Chromogenic Endpoint assay...
...
Catch and Release® v2.0 Reversible Immunoprecipitation System...
Biology Products: