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Chapter 36: Problem 117

Some fish swim in schools, which can respond rapidly by moving quickly away from predator threats. In schools, fish swim in a coordinated pattern without moving chaotically and bumping into one another. Which type of communication between individuals could account for the precisely coordinated movements of all of the fish in a school in response to a threat? a. aural signals b. pheromone signals c. tactile signals d. visual signals

Short Answer

Expert verified
d. visual signals

Step by step solution

01

Analyze the Scenario

Fish in schools move in a coordinated pattern without chaotic movement and can respond rapidly to threats.
02

Understand Types of Communication

Review the types of signals: aural (sound), pheromone (chemical), tactile (touch), and visual (sight) signals.
03

Match Communication to Behavior

Consider visual signals. Visual signals, such as changes in movement or direction, allow fish to see and quickly react in a coordinated manner to threats.
04

Exclude Less Likely Options

Aural signals (sound) might not work well underwater due to dispersion. Pheromone signals would be slower (chemical diffusion). Tactile signals would require physical contact, which is impractical in fast movement.
05

Identify the Most Suitable Signal

Visual signals are the most suitable for ensuring coordinated and rapid responses among fish in a school.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

behavioral coordination in fish
Fish school communication requires seamless behavioral coordination. In a school, fish move together as a single entity. This synchronized movement helps them avoid predators and navigate efficiently.

The coordination is critical because it enables fish to:
  • Avoid collisions with each other
  • Change direction quickly
  • Maintain a cohesive group

Such coordination relies on instant communication. Fish need to send and receive signals quickly to adjust their movements. This ensures that the entire school can react as one, maintaining their formation and responding to threats instantly.
types of animal communication
Animals use various types of communication to interact. Understanding these types helps us determine which is most feasible for fish schools:
  • Aural signals: Communication through sound. While effective on land, it can be less efficient underwater where sound disperses more quickly.
  • Pheromone signals: Use of chemical substances to convey messages. This method is generally slower because it relies on the diffusion of chemicals.
  • Tactile signals: Messages sent through touch. This requires physical contact, which isn't practical for fast, coordinated movement in fish schools.
  • Visual signals: Communication through sight. Changes in movement, color, or body position are quickly perceived by others. This method is highly effective for immediate responses.

Given the need for rapid and coordinated responses, visual signals are typically the most practical in fish schools.
visual signals in aquatic animals
Visual signals are an essential part of how fish and other aquatic animals communicate. This method involves using visual cues to convey information.

For fish in schools:
  • They can see changes in speed or direction
  • They observe body movements or positions
  • They might also notice changes in coloration

These cues are processed quickly, allowing fish to make almost instant adjustments to their swimming patterns. This rapid processing is crucial for staying in the school and avoiding predators.

The reliance on visual signals helps fish maintain strong group cohesion while being highly adaptable in dynamic environments.

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Most popular questions from this chapter

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