Related Experiment Video
Updated: Jun 9, 2026

Silencing the Spark: CRISPR/Cas9 Genome Editing in Weakly Electric Fish
Published on: October 27, 2019
Group cohesion in juvenile weakly electric fish Mormyrus rume proboscirostris
V Khait1, E Tahiraj, N Seemungal
1Department of Psychology, Hunter College of the City University of New York, 695 Park Avenue, New York, NY 10065, USA.
Abstract:
The current study demonstrated that juvenile Mormyrus rume proboscirostris, an African freshwater weakly electric fish, used their active electrosense in group cohesion. Data also indicated that sight and mechano-reception could play a synergistic role in controlling this behaviour. The developmental change from a larval monophasic electric organ discharge to the adult biphasic waveform was accompanied by a reversal of the fish's social spacing. Light was aversive to social spacing in the younger fish (aged 49 and 65 days), but facilitated aggregation in the older fish (245 days).
Related Concept Videos
Osmoregulation in Fishes
Fixed Action Patterns
Testing a Claim about Population Proportion
There are two methods of testing a claim about a population proportion: (1) Using the sample proportion from the data where a binomial distribution is approximated to the normal distribution and (2) Using the binomial probabilities calculated from the data.
The first method uses normal distribution as an approximation to the binomial distribution. The requirements are as follows: sample size is large...
Diversity of Protists IV

