scholarly journals Multiplexed temporal coding of electric communication signals in mormyrid fishes

2013 ◽  
Vol 216 (13) ◽  
pp. 2365-2379 ◽  
Author(s):  
C. A. Baker ◽  
T. Kohashi ◽  
A. M. Lyons-Warren ◽  
X. Ma ◽  
B. A. Carlson
Keyword(s):  
Temporal Coding ◽  
Communication Signals ◽  
Mormyrid Fishes

scholarly journals Signal diversification is associated with corollary discharge evolution in weakly electric fish

2020 ◽  
Author(s):  
Matasaburo Fukutomi ◽  
Bruce A. Carlson
Keyword(s):  
Sensorimotor Integration ◽  
Time Window ◽  
Electric Organ Discharge ◽  
Corollary Discharge ◽  
Weakly Electric Fish ◽  
Active Sensing ◽  
Communication Signals ◽  
Electric Pulses ◽  
Communication Signal ◽  
Mormyrid Fishes

ABSTRACTCommunication signal diversification is a driving force in the evolution of sensory and motor systems. However, little is known about the evolution of sensorimotor integration. Mormyrid fishes generate stereotyped electric pulses (electric organ discharge [EOD]) for communication and active sensing. The EOD has diversified extensively, especially in duration, which varies across species from 0.1 to over 10 ms. In the electrosensory hindbrain, a corollary discharge that signals the timing of EOD production provides brief, precisely timed inhibition that effectively blocks responses to self-generated EODs. However, corollary discharge inhibition has only been studied in a few species, all with short duration EODs. Here, we asked how corollary discharge inhibition has coevolved with the diversification of EOD duration. We addressed this question by comparing 7 mormyrid species having varied EOD duration. For each individual fish, we measured EOD duration and then measured corollary discharge inhibition by recording evoked potentials from midbrain electrosensory nuclei. We found that delays in the onset of corollary discharge inhibition were strongly correlated with EOD duration as well as delay to the first peak of the EOD. In addition, we showed that electrosensory receptors respond to self-generated EODs with spikes occurring in a narrow time window immediately following the first peak of the EOD. Direct comparison of time courses between the EOD and corollary discharge inhibition revealed that the inhibition overlaps the first peak of the EOD. Our results suggest that internal delays have shifted the timing of corollary discharge inhibition to optimally block responses to self-generated signals.SIGNIFICANCE STATEMENTCorollary discharges are internal copies of motor commands that are essential for brain function. For example, corollary discharge allows an animal to distinguish self-generated from external stimuli. Despite widespread diversity in behavior and its motor control, we know little about the evolution of corollary discharges. Mormyrid fishes generate stereotyped electric pulses used for communication and active sensing. In the electrosensory pathway that processes communication signals, a corollary discharge inhibits sensory responses to self-generated signals. We found that fish with long duration pulses have delayed corollary discharge inhibition, and that this time-shifted corollary discharge optimally blocks electrosensory responses to the fish’s own signal. Our study provides the first evidence for evolutionary change in sensorimotor integration related to diversification of communication signals.

Temporal Coding in Realistic Neural Networks

1995 ◽  
Vol 5 (10) ◽  
pp. 1367-1374
Author(s):  
S. M. Gerasyuta ◽  
D. V. Ivanov
Keyword(s):  
Neural Networks ◽  
Temporal Coding

The Effects of 884 MHz GSM Wireless Communication Signals on Self-reported Symptom and Sleep (EEG)- An Experimental Provocation Study

PIERS Online ◽  
2007 ◽  
Vol 3 (7) ◽  
pp. 1148-1150 ◽  
Author(s):  
Bengt B Arnetz ◽  
Torbjorn Akerstedt ◽  
Lena Hillert ◽  
Arne Lowden ◽  
N. Kuster ◽  
...  
Keyword(s):  
Wireless Communication ◽  
Sleep Eeg ◽  
Communication Signals

scholarly journals Inhibitory Copulation Effect of Vibrational Rival Female Signals of Three Stink Bug Species as a Tool for Mating Disruption

Insects ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 177
Author(s):  
Aline Moreira Dias ◽  
Miguel Borges ◽  
Maria Carolina Blassioli Moraes ◽  
Matheus Lorran Figueira Coelho ◽  
Andrej Čokl ◽  
...  
Keyword(s):  
Pest Management ◽  
Mating Behavior ◽  
Mating Disruption ◽  
Management Strategies ◽  
Stink Bug ◽  
Stink Bugs ◽  
Vibratory Communication ◽  
Communication Signals ◽  
Long Duration ◽  
Bean Plants

Stink bugs are major pests in diverse crops around the world. Pest management strategies based on insect behavioral manipulation could help to develop biorational management strategies of stink bugs. Insect mating disruption using vibratory signals is an approach with high potential for pest management. The objective of this work was to investigate the effect of conspecific female rival signals on the mating behavior and copulation of three stink bug species to establish their potential for mating disruption. Previously recorded female rival signals were played back to bean plants where pairs of the Neotropical brown stink bug, Euschistus heros, and two green stink bugs, Chinavia ubica and Chinavia impicticornis were placed. Vibratory communication and mating behavior were recorded for each pair throughout the experimental time (20 min). Female rival signals show a disrupting effect on the reproductive behavior of three conspecific investigated stink bug species. This effect was more clearly expressed in E. heros and C. ubica than in C. impicticornis. The likelihood of copulating in pairs placed on control plants, without rival signals, increased 29.41 times in E. heros, 4.6 times in C. ubica and 1.71 times in C. impicticornis. However, in the last case, the effect of female rivalry signals in copulation was not significant. The effect of mating disruption of female rival signals of the three stink bug species may originate from the observed reduction in specific vibratory communication signals emitted, which influences the duet formation and further development of different phases of mating behavior. Our results suggest that female rival signals have potential for application in manipulation and disruption of mating behavior of stink bugs. Further work needs to focus on the effects of female rival signals used in long duration experiments and also their interactions with chemical communication of stink bugs.

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