Bird repelling devices

A deterrent device in aquaculture is a system used to keep predators away from fish farming installations, particularly from net pens or cages used to raise fish like salmon or trout.

🔹 General Description:

Name: Deterrent (or scaring device)
Use: Protection of aquaculture farms from predators
Fields of application: Marine and freshwater aquaculture

🔹 Types of deterrent systems in aquaculture:

1. Acoustic deterrents

   • Emit unpleasant sounds or predator calls.

   • Examples: gas cannons, recorded bird cries, ultrasonic devices.

   • Purpose: create a hostile sound environment for intruders.

2. Visual deterrents

   • Mimic predators or use shiny/moving objects.

   • Examples: bird-shaped kites, balloons with eye patterns, reflective tapes.

   • Purpose: visually disturb or scare predators.

3. Physical / mechanical deterrents

   • Barriers, nets, or moving parts (e.g., spinning arms).

   • Sometimes integrated with motion sensors.

   • Purpose: physically block or surprise predators.

4. Electronic / automated deterrents

   • Systems with sensors and automatic activation.

   • Examples: water jets, low-intensity lasers, smart deterrent systems.

   • Allow for targeted and responsive deterrence.

🔹 Main Objectives:

• Preserve fish health and welfare by limiting stress caused by predators.

• Reduce economic losses from attacks.

• Minimize lethal or harmful methods towards wildlife.

• Comply with animal welfare and biodiversity regulations.