Related Experiment Video
Updated: Mar 31, 2026
10:56
Long-term Behavioral Tracking of Freely Swimming Weakly Electric Fish
Published on: March 6, 2014
13.1K
Electric eels use high-voltage to track fast-moving prey.
1Department of Biological Sciences VU Station B, Vanderbilt University, Box 35-1634 Nashville, Tennessee 37235, USA.
Nature Communications
|October 21, 2015
Summary
Electric eels use their powerful electric discharges not only as a weapon but also for sophisticated electrolocation. This dual function allows for precise tracking of fast-moving prey, revealing a more complex sensory system.
Area of Science:
- Zoology
- Neuroethology
- Bioelectricity
Background:
- Electric eels (Electrophorus electricus) are known for high-voltage discharges used as a weapon.
- The sensory capabilities of electric eel discharges, particularly for prey detection, remain largely unexplored.
Purpose of the Study:
- To investigate the dual role of high-voltage electric organ discharges (EODs) in electric eels.
- To determine if electric eels utilize EODs for active electrolocation of prey and other objects.
Main Methods:
- Observing electric eel behavior in response to prey and conductors.
- Analyzing strike patterns and success rates under varying sensory conditions.
- Comparing electrosensory and mechanosensory cue utilization during hunting.
Main Results:
- Electric eels employ high-voltage EODs for both stunning prey and high-resolution electrolocation.
- Eels exhibit precise, high-frequency electrolocation similar to a bat's 'terminal feeding buzz'.
- Sensory conflict experiments show eels prioritize electrosensory cues for prey localization, aborting strikes without conductors.
Conclusions:
- Electric eels possess a sophisticated sensory system integrating offensive and defensive capabilities.
- High-voltage discharges serve a dichotomous function, enhancing predatory success and revealing complex sensory processing.
- These findings challenge previous understandings of electric fish evolution and sensory biology.
Related Concept Videos
01:14Action Potential
12.3K
Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
12.3K
01:31Action Potential
8.3K
Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
8.3K
01:41Action Potentials
150.2K
Overview
150.2K
01:28Electrical Synapses
11.8K
Electrical synapses found in all nervous systems play important and unique roles. In these synapses, the presynaptic and postsynaptic membranes are very close together (3.5 nm) and are actually physically connected by channel proteins forming gap junctions.
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...
11.8K
01:13Finding Electric Potential From Electric Field
6.2K
For a system of charges, it is easy to calculate the system's potential because potential is a scalar quantity. However, in some instances where calculating the electric field is more straightforward than finding the potential, the electric field is used to calculate the system's potential. For a positive charge, the electric field is radially outward, and the potential is positive at any finite distance from the positive charge. In such an electric field, the motion away from the...
6.2K
01:27Induced Electric Fields: Applications
2.9K
An important distinction exists between the electric field induced by a changing magnetic field and the electrostatic field produced by a fixed charge distribution. Specifically, the induced electric field is nonconservative because it does not work in moving a charge over a closed path. In contrast, the electrostatic field is conservative and does no net work over a closed path. Hence, electric potential can be associated with the electrostatic field but not the induced field. The following...
2.9K