Shark Senses Lab: Understanding Odour Plumes, Electroreception, and the Lateral Line

Odour Plumes: Tracking Chemical Cues

Sharks are adept at detecting minute concentrations of chemicals in water, which they use to locate prey or navigate their environment. An odour plume is a concentration gradient of chemical signals that can be followed by sharks. As the shark moves through this plume, it senses changes in chemical concentration, allowing it to home in on its target.

The efficiency of following an odour plume depends on factors such as the strength and directionality of the chemical signal, water flow patterns, and the shark's ability to detect these subtle changes.

Electroreception: The Ampullae of Lorenzini

Sharks have an extraordinary sense of electric fields through their ampullae of Lorenzini. These specialized organs are clusters of electroreceptors that can detect minute electrical currents in the water, allowing sharks to locate prey and navigate even when visibility is low.

The 1/r^3 dipole field model explains how these receptors work: as an object moves closer to a source of electric current, the strength of the electric field it experiences increases according to this inverse cube law. This allows sharks to triangulate the location of their prey based on the intensity and direction of the detected fields.

The Lateral Line: Sensing Mechanical Vibrations

In addition to electroreception, sharks also use their lateral line system to sense mechanical vibrations in the water. This network of sensory canals and pores runs along the shark's body, allowing it to detect movements and disturbances in its environment.

By combining information from odour plumes, electric fields, and mechanical vibrations, sharks can navigate effectively and locate prey with remarkable precision.

Search Efficiency: Measuring Performance

The simulation allows you to measure the search efficiency of different shark species over multiple trials. This is crucial for understanding how these animals adapt their sensory strategies in various environments and conditions.

By analyzing the results, researchers can gain insights into the effectiveness of each sensing mechanism and how they might be used in conjunction with one another.

Frequently asked questions

Try it live

Everything above runs in your browser — open Shark Senses Lab: Odour Plumes, Electroreception and the Lateral Line and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.