HOME >> BIOLOGY >> NEWS
Contrary to common wisdom, scientist discovers some mammals can smell objects under water

ce and then were sucked back into the nostrils.

"Because the olfactory nerves in the nose are covered with mucous, odorant molecules are all water soluble," Catania said. "So, when these bubbles come into contact with an object, it is almost inevitable that odorant molecules will mix with the air and be drawn into the nose when the bubble is inhaled."

Just because the moles are getting whiffs of interesting odors underwater doesn't necessarily mean they smell them. So Catania devised some additional tests.

One of the complicating factors was the star-nosed mole's unusual nose, which is ringed by a star-shaped set of fleshy appendages. It uses its star like a super-sensitive set of fingers to identify objects it encounters while burrowing and swimming. So, at the same time it is sniffing at an object it is also fingering it with its star.

To determine if the mole can identify edible objects by sniffing alone, Catania created underwater scent trails leading to food and recorded how well the moles' could follow them. To keep the moles from using their tactile star, he put a grid-work between the animals and the scent trails. The openings in the grid were too small for the star appendages to squeeze through but large enough so the air bubbles could pass without difficulty.

These trials demonstrated that the moles could follow the scent trail by sniffing alone (without the tactile star).

Five moles were tested on earthworm scent trails and followed the trail to its reward with accuracies ranging from 75 percent to 100 percent accuracy. Two moles were tested with fish scent trails and followed them with 85 percent and 100 percent accuracy.

When the grid was replaced with a screen with openings too small for the air bubbles to pass through, however, the moles' performance dropped down to the level of chance the same as their performance with no-scent trails.

In order to see if this capability was limited to the star-nosed mole or
'"/>

Contact: David Salisbury
david.salisbury@vanderbilt.edu
615-343-6803
Vanderbilt University
20-Dec-2006


Page: 1 2 3

Related biology news :

1. Features of replication suggest viruses have common themes, vulnerabilities
2. Risk of common vaginal infection linked to preterm birth appears higher for blacks
3. New gene mutation identified in common type of dementia
4. Study identifies a common genetic risk factor for colorectal and prostate cancer
5. Researchers pit novel version of common virus against cancer
6. Gene responsible for common hearing loss identified for first time
7. OSA symptoms more common among African-American women than Caucasians
8. Sensitivity to diverse range of chemotherapeutic drugs linked to common pathway
9. Largest ever study of genetics of common diseases published today
10. First confirmed common genetic risk factors for breast cancer
11. Scripps research study shows humans and plants share common regulatory pathway

Post Your Comments:
(Date:12/17/2014)... N.C. , Dec. 16, 2014 Valencell, ... licensed its PerformTek biometric technology to industry leaders such ... highly accurate, clinically validated, biometric wearable products. These products ... 6-9 in Las Vegas . ... technology is accurate, flexible and robust – with the ...
(Date:12/17/2014)... Dec. 16, 2014  Automation is fundamentally transforming ... evident than at international borders. Over the past ... have allowed veteran travelers to self process through ... (APC) Kiosks at an increasing number of airports, ... According to Maxine Most , ...
(Date:12/11/2014)... 09, 2014 Research and Markets ... ( http://www.researchandmarkets.com/research/twhjll/biometrics_market ) has announced the addition ... Region 2015-2019"  report to their offering. ... is advances in technology. With continuous advances in ... to the latest standard that meets the needs ...
Breaking Biology News(10 mins):Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2Automated Border Control (ABC) Transforms the Global Travel Experience With More Than 2500 ABC eGates and APC Kiosks Deployed In Airports, Seaports, and Land Borders Worldwide 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2
(Date:12/22/2014)... 22, 2014 GenomeDx Biosciences today announced that ... Classifier, a genomic test for prostate cancer, was able ... managed by radical prostatectomy without adjuvant therapy. Although rapid ... uncommon, using tumor genomics to identify these men who ... an important advance. The study has been published ...
(Date:12/22/2014)... TENN (PRWEB) December 22, 2014 Fertility ... Donor Egg Bank USA , a network of ... country. Through this partnership, patients have fast access to ... in vitro fertilization, IVF . Fertility Associates of Memphis ... offer this fertility treatment option. , Dr. William ...
(Date:12/19/2014)... Ill. , Dec. 19, 2014 Naurex ... develop novel drugs for diseases of the central nervous ... president and chief executive officer, will present at the ... Riedel,s presentation will take place at 3:00 p.m. PST ... Francis in San Francisco, Calif. ...
(Date:12/19/2014)... 19, 2014 Research and Markets ... the "Technology Innovations in Smart Fabrics (Technical ... http://photos.prnewswire.com/prnh/20130307/600769 The ... offers a detailed assessment on technological advancements and ... 1. The Smart Fabrics market ...
Breaking Biology Technology:Study Published in European Urology Shows that the Decipher Prostate Cancer Classifier is Predictive of Rapid Metastasis in High-Risk Men who have had Prostate Surgery 2Study Published in European Urology Shows that the Decipher Prostate Cancer Classifier is Predictive of Rapid Metastasis in High-Risk Men who have had Prostate Surgery 3Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3Naurex to Present at 33rd Annual J.P. Morgan Healthcare Conference 2Technology Innovations in Smart Fabrics (Technical Insights) 2
Cached News: