Electroreception in marine fishes: chondrichthyans

Area of Science:

• Marine Biology
• Sensory Ecology
• Comparative Physiology

Background:

• Electroreception is a key sensory modality in marine fishes, particularly chondrichthyans (sharks, skates, rays, and chimaeras).
• Understanding passive electroreception is crucial for comprehending fish behavior and adaptation in marine ecosystems.

Purpose of the Study:

• To provide an up-to-date review of passive electroreception in marine fishes.
• To examine how electroreceptive fishes may respond to electric and magnetic stimuli in a changing marine environment.

Main Methods:

• Review of existing literature on electroreception in marine Chondrichthyes.
• Analysis of morphological, physiological, and behavioral aspects of electroreception.
• Consideration of genetic and molecular approaches for future insights.

Main Results:

• Detailed overview of the history, passive mode, and adaptations of electroreceptors.
• Explanation of the physiological mechanisms and behaviors mediated by electroreception.
• Identification of remaining knowledge gaps in understanding this sensory modality.

Conclusions:

• Despite advances, significant gaps persist in our understanding of marine fish electroreception.
• Anthropogenic electric and magnetic fields pose a concern for the adaptation of electroreceptive fishes.