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The DDD – Dolphin Deterrent Device

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PRODUCT DESCRIPTION

Fishing activities are the most serious threat to dolphins, being the cause of the death of thousands of specimens per year. Conversely, dolphins cause serious economic damage to fishermen, as predatory activities of marine mammals cause loss of catches and damage to nets.

 

The DDD, Dolphin Deterrent Device, are electronic equipment resulting from a long design activity, in collaboration with prestigious research centers, such as the Institute of Marine and Environmental Research (IRMA) of the CNR of Mazara del Vallo and the Institute of Marine Research in Moscow. DDDs keep dolphins away from their greatest danger by interacting with their echo-location system (sonar), thereby protecting the equipment and profitability of the fishing industry.

 

DDDs attach to fishing gear (nets, longlines, etc.) and are activated when they come into contact with water. They emit trains of ultrasonic signals at random frequencies, which prevent dolphins from becoming accustomed to the signals. Even the intervals between one train of signals and the next are random, but have different average durations depending on the models suitable for the various types of fishing. The emission power is 165 dB (decibels), the highest in existence, obtained thanks to a particularly sophisticated technology.

 

The DiD, Dolphin interactive Dissuasor, evolution of DDD models, produces ultrasound only when the presence of mammals in the area is detected, through a special “listening” circuit of the clicks emitted by them.

 

The devices comply with the Regulation of the Council of the European Union (EC) 812/2004 of 26 April 2004 Annex II.

 

The level of emissions of both devices, DDD and DiD, does not produce any harm to either mammals or fish, which are insensitive to the frequencies emitted.

 

DDD/DiD bollards have proven their effectiveness in the seas of many areas of the world, since 2004, in tens of thousands of pieces.

 

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