Navigation Links
Paddlefish sensors tuned to detect signals from zooplankton prey
Date:1/5/2012

In 1997, scientists at the Center for Neurodynamics at the University of Missouri - St. Louis demonstrated that special sensors covering the elongated snout of paddlefish are electroreceptors that help the fish detect prey by responding to the weak voltage gradients that swimming zooplankton create in the surrounding water. Now some of the same researchers have found that the electroreceptors contain oscillators, which generate rhythmical firing of electrosensory neurons. The oscillators allow the electroreceptors to create a dynamical code to most effectively respond to electrical signals emitted naturally by zooplankton. The results are presented in a paper appearing in the AIP's journal Chaos.

To test the response of paddlefish electroreceptors to different stimuli, the researchers recorded signals from electrosensory neurons of live fish, while applying weak electric fields to the water in the form of computer-generated artificial stimuli or signals obtained previously from swimming zooplankton. The team then analyzed the power contained in different frequency ranges for the noisy input signals and the corresponding electroreceptor responses, and compared the two. In addition to finding that the paddlefish sensors best encode the signals emitted by zooplankton, the team also found that as the strength of the input signal was raised, the firing of the fish's sensory neurons transitioned from a steady beat to a noisy pattern of intermittent bursts. This bursting pattern became synchronized across different groups of electroreceptors, increasing the likelihood of the signal reaching higher-order neurons. This provides a plausible mechanism to explain how reliable information about the nearness of prey is transferred to the fish's brain, the researchers write.


'/>"/>
Contact: Catherine Meyers
cmeyers@aip.org
301-209-3088
American Institute of Physics
Source:Eurekalert

Page: 1

Related biology news :

1. Sturgeon, paddlefish scientists from North America to meet Aug. 31-Sept. 2 in Montana
2. Microneedle sensors may allow real-time monitoring of body chemistry
3. Improved characterization of nanoparticle clusters for EHS and biosensors research
4. DigitalPersona Goes Mobile with New U.are.U 5100 Fingerprint Sensors for Battery-Powered Mobile ID Devices
5. Nanosensors made from DNA may light path to new cancer tests and drugs
6. New sensors streamline detection of estrogenic compounds
7. Navy, Marine Corps tests autonomous zero-power bathythermograph sensors
8. Nanowire-based sensors offer improved detection of volatile organic compounds
9. First miniature sensors to measure the temperature of the world’s oceans
10. National Biophotonic Sensors and Systems Center announced
11. MU researchers use motion sensors to determine equine lameness
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/18/2017)... , Jan. 18, 2017  In vitro diagnostic ... to mergers and acquisitions (M&A), and Kalorama Information expects ... such acquisitions have been shifting. Generally, uncertainty in reimbursement ... and the U.S. has changed the acquisitions landscape. Instead ... resulted in companies buying partners outside of their home ...
(Date:1/13/2017)... Jan. 13, 2017 Sandata Technologies, LLC, ... the homecare industry, including Electronic Visit Verification™ (EVV™), ... Justin Jugs, as Senior Vice President of Product ... years of homecare experience to Sandata, where he ... plans to align Sandata,s suite of solutions with ...
(Date:1/12/2017)... , Jan. 12, 2017  New research undertaken by ... office of the future.  1,000 participants were simply asked which ... months which we may consider standard issue.  Insights on what ... 2017 were also gathered from futurists and industry leaders including ... James Canton .  Some of ...
Breaking Biology News(10 mins):
(Date:2/18/2017)... ... February 17, 2017 , ... The ... and the Center for International Blood & Marrow Transplant Research (CIBMTR) will take ... , The combined scientific sessions offer investigators, clinicians, laboratory technicians, clinical ...
(Date:2/17/2017)... 17, 2017  BioGenex, a global leader in ... a novel system for quantitative immunohistochemistry (IHC). The ... of Rochester (NY, USA) and Konica-Minolta Inc. ( ... is able to accurately quantify the expression of ... growth factor receptor-2) in clinical samples. Quantitative IHC ...
(Date:2/16/2017)... Belgium (PRWEB) , ... February 16, 2017 , ... ... (SIOTAD) framework primarily aimed at the agricultural industry. Pilot studies are about to get ... products through IoT, Big Data and 5G innovations. The concept is expected to be ...
(Date:2/16/2017)... , Feb. 16, 2017  MDNA Life ... the development of liquid biopsy tests based on ... into an exclusive license agreement with its first ... proprietary liquid biopsy test for prostate cancer, the ... Korea . This is the first overseas ...
Breaking Biology Technology: