Navigation Links
Dolphins maintain round-the-clock visual vigilance
Date:4/30/2009

Dolphins have a clever trick for overcoming sleep deprivation. Sam Ridgway from the US Navy Marine Mammal Program explains that they are able to send half of their brains to sleep while the other half remains conscious. What is more, the mammals seem to be able to remain continually vigilant for sounds for days on end. All of this made Ridgway and his colleagues from San Diego and Tel Aviv wonder whether the dolphins' unrelenting auditory vigilance tired them and took a toll on the animals' other senses? Ridgway and his team set about testing two dolphins' acoustic and visual vigilance over a 5 day period to find out how well they functioned after days without a break. The team publish their results on May 1 2009 in the Journal of Experimental Biology at http://jeb.biologists.org.

First Ridgway and his colleagues, Mandy Keogh, Mark Todd and Tricia Kamolnick, trained two dolphins to respond to a 1.5 s beep sounded randomly against a background of 0.5 s beeps every 30 s. Ridgway explains that the sounds were low enough for the dolphins to barely notice them as they swam through their enclosure, but the animals sprung into action every time they heard the 1.5 s tone, even after listening to the sounds for 5 days without a break. Their auditory vigilance remained as sharp as it had been 5 days earlier.

Next Allen Goldblatt and Don Carder designed a visual stimulus to test the dolphins' vigilance while they continued listening to the repetitive beeps. Knowing that the dolphins' binocular vision is limited because their eyes are situated on opposite sides of their heads, Kamolnick trained one of the dolphins, SAY, to recognise two shapes (either three horizontal red bars or one vertical green bar) with her right eye before training her to recognise the same shapes with the left eye, reasoning that if half of her brain was asleep during testing, the dolphin would only see the shapes through the eye conne
'/>"/>

Contact: Kathryn Knight
kathryn@biologists.com
44-122-342-5525
The Company of Biologists
Source:Eurekalert

Page: 1 2

Related biology news :

1. Grays Paradox solved: Researchers discover secret of speedy dolphins
2. Whales and dolphins influence new wind turbine design
3. Killer whales, blind bats, discriminating dolphins, mating birds
4. Mercury contamination found in stranded Victorian dolphins
5. Migrating squid drove evolution of sonar in whales and dolphins, researchers argue
6. New book, Untangling the Double Helix, explores enzymes responsible for maintaining genome integrity
7. Astronauts may need more intense workouts to maintain muscle fitness in space
8. Maintaining the brains wiring in aging and disease
9. Niacins role in maintaining good cholesterol
10. UCR plant cell biologist to study how plant stem cells maintain and change their identity
11. 2 genes influence social behavior, visual-spatial performance in people with Williams syndrome
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/18/2015)... DUBLIN , Aug. 17, 2015 ... the addition of the "Global Biometric Authentication ... Application - Estimation & Forecast, 2015-2020" report ... biometric authentication and identification systems market is expected ... from 2015 to 2020 and generate over $25 ...
(Date:8/12/2015)... , August 12, 2015 As ... mobile payment innovation and advanced biometrics technology is accelerating ... way consumers rely on using their credit cards, the ... the future for payment services led by companies in ... ), :  Google, Inc. (NASDAQ: GOOG ), Apple ...
(Date:8/11/2015)... , August 11, 2015 Today, ZUK announced ... received as well as expected revenues in 2015 that relate to ... communicated revenue guidance of approximately 2,200 MSEK for 2015. ... a prominent smartphone manufacturer in ... selected FPC1 155 for ...
Breaking Biology News(10 mins):Global Biometric Authentication & Identification Market 2015: Focus On Modality, Motility & Application - Estimation & Forecasts to 2020 for the $25 Billion Industry 2Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 2Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 3Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 4Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 5Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 6FPC's Touch Fingerprint Sensor FPC1155 in ZUK's Smartphone Z1 2
... field trials involving five major food crops grown ... harvesting dramatically less bounty than those raised in ... scientists warn that global food supplies could be ... The new findings are based on on-going open-air ...
... characterized by a decrease in bone mass and density ... and deformities, afflicts some 10 million Americans over the ... Public Health (HSPH) have discovered that eliminating a protein, ... bone mass throughout their skeletal system. The results may ...
... has identified a molecule that plays a key role ... of the adult brain. , QBI neural migration ... research provided new clues regarding development of the corpus ... between the left and right hemispheres of the adult ...
Cached Biology News:Food-crop yields in future greenhouse-gas conditions lower than expected 2Research identifies protein in mice that regulates bone formation 2
(Date:8/26/2015)... VANCOUVER , Aug. 26, 2015 /PRNewswire/ - iCo ... ICOTF), today reported financial results for the quarter ... are expressed in Canadian dollars and presented under ... continue pre-clinical activities with respect to our Oral ... of a contract manufacturer," said Andrew Rae ...
(Date:8/26/2015)... 2015  Platform therapeutic company Symic Biomedical, Inc. ... $1.5M Phase II SBIR grant from the National ... therapeutic agent to reduce arteriovenous fistula (AVF) failures, ... renal disease (ESRD) patients undergoing hemodialysis. The two-year ... and Digestive and Kidney Diseases (NIDDK), will allow ...
(Date:8/26/2015)... After litigating and negotiating patent infringement ... P2i United States patent RE43,651 (the ... the United States without any admission or ... party. As a result of the parties, settlement, the US ... dismissed the case without prejudice. Under ...
(Date:8/25/2015)... SHANGHAI , Aug. 25, 2015   WuXi ... open-access R&D capability and technology platform company serving the ... Holdings Ltd. ("Lee,s Pharm," Hong Kong Exchange Stock Code: ... Hong Kong with 20 years of operations ... the two companies have signed an agreement whereby WuXi,s ...
Breaking Biology Technology:iCo Therapeutics Announces Second Quarter 2015 Financial Results 2iCo Therapeutics Announces Second Quarter 2015 Financial Results 3Symic Biomedical Awarded $1.5MM NIH Phase II SBIR Grant to Develop its Proteoglycan Mimetic Therapeutics to Reduce Vascular Access Failures in ESRD 2Symic Biomedical Awarded $1.5MM NIH Phase II SBIR Grant to Develop its Proteoglycan Mimetic Therapeutics to Reduce Vascular Access Failures in ESRD 3P2i Settles United States Litigation 2WuXi PharmaTech to Be Exclusive Supplier of Laboratory Testing Services to Lee's Pharm 2WuXi PharmaTech to Be Exclusive Supplier of Laboratory Testing Services to Lee's Pharm 3
... unveiled a program of healthcare savings accounts, leveraging ... administration. , ,Spurred on by HSA authorization ... set of services which includes managing tax-advantaged healthcare ... in healthcare transactions. , ,"Our financial institution ...
... At the recent Digital Healthcare Conference top healthcare ... can improve patient safety, decrease medical costs, and ... Entrepreneurs Conference held in Milwaukee, Mithridion won the ... recent report has stated that Wisconsin lags behind ...
... their top issues, they dont see where security really fits ... few executives know about in most organizations: Security is ... scans and firewalls. Security should be at an executive level ... , ,In several semesters of network security classes, attendees from ...
Cached Biology Technology:To find solid security candidates, look beyond tech certificates 2To find solid security candidates, look beyond tech certificates 3To find solid security candidates, look beyond tech certificates 4
... of the human Topoisomerase II gene. ... state of nucleic acids by passing an intact ... a separate DNA helix (1,2) . As a ... enzyme can relax negatively or positively supercoiled DNA, ...
Maxi XL Hybridization Oven for Extra Large bottles. 6 bottle (70 mm) rotisserie + shaker tray available for simultaneous use. Includes linear and orbital shaker trays, 4 extra large bottles, pack o...
... Kit - Monolayer is a system designed for ... monolayer in a serum-free environment. The kit contains ... has been optimized for neural stem cell expansion ... & Development 10 :3129). Human fibroblast growth ...
Shake 'n' Stack Oven - New Model (includes 10 bottle capacity rotisserie, adjustable feet, drip tray, manual PLUS Shaker Platform)...
Biology Products: