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:2/9/2016)... (NASDAQ: AWRE ), a leading supplier of biometrics software and ... ended December 31, 2015.  --> ... million, an increase of 61% compared to $4.3 million in the ... 2015 was $2.6 million compared to $0.2 million in the fourth ... Higher revenue and operating income in the fourth quarter of ...
(Date:2/4/2016)... 2016 The field of Human Microbiome ... most popular hubs of the biotechnology industry. While ... studies of human microbiota, have garnered a lot ... microbiome space has literally exploded in terms of ... report focuses on biomedical aspects of research, development, ...
(Date:2/3/2016)... http://www.researchandmarkets.com/research/d8zjcd/emotion_detection ) ... "Emotion Detection and Recognition Market by Technology ... Tools (Facial Expression, Voice Recognition and Others), ... Global forecast to 2020" report to ... ) has announced the addition of the ...
Breaking Biology News(10 mins):
(Date:2/11/2016)... 2016 Non-profit Consortium Aims to Generate ... Support Research and Discovery --> ... ambitious plan to sequence 100,000 individuals. It is intended to ... least 7 of North and East Asian countries. ... the project will focus on creating phased reference genomes for ...
(Date:2/11/2016)... and GERMANTOWN, Maryland , February 11, ... Standard: QIA) today announced the introduction of more than ... profiling, expanding QIAGEN,s portfolio of Sample to Insight solutions ... select from over 20,000 human genes and lncRNA to ... cellular phenotypes and disease processes. --> QGEN ...
(Date:2/11/2016)... -- Wellcentive today announced it has been selected by FamilyCare ... community care organization (CCO) with more than 130,000 ... and care management solutions and services. Wellcentive,s capabilities ... managers, analysts and care managers while providing insight ... members. Oregon . ...
(Date:2/11/2016)... DELRAY BEACH, Florida , February 11, 2016 ... --> PositiveID Corporation ("PositiveID" or "Company") (OTCQB: ... and diagnostics, announced today that its Thermomedics subsidiary, ... significant progress on its growth plan in January ... healthcare products distributors, increasing sequential monthly sales growth, ...
Breaking Biology Technology: