Support measures

Passive RFID technology with its cost-effective production and embedding of information provides a good basis for the identification of lost aquaculture (and fishing) gear. Also other technologies like the Passive Acoustic Transponder should be taken into account.

Technical support Technical support

Photo: Universal RFID Photo: Universal RFID

Relevant type of aquaculture:

Fish Shellfish Seaweed

Relevant sea basin:

Baltic

Relevant stage:

Monitoring and quantification

Related Barriers:

  • There is a lack of knowledge of practical tracking systems for ALDFG.

  • This technique does not yet seem to be suitable for the requirements of retrievability, since these tags can only be read out after recovery and the radio signal only covers a minimal distance of 10 – 60 cm.

Related Good Practice:

M&Q GP4.2

Use acoustic devices such s the PAT

The project MARELITT Baltic will also investigate other acoustic devices such as the Passive Acoustic Transponder (PAT) which can be read with its individual identification number for specific frequencies on ship sonars and of 3D-Structure Scans to retrieve ALDFG at known locations. Depending on the orientation of the net in the water column or the seabed added barium sulphate to nylon nets increased their acoustic detectability by sonar, but has also led to disadvantages for their easy operation for target species. Information of the occurrence of lost gear on the surface by high definition videos and the overview maps of underwater obstacles could provide valuable information guiding to areas where ALDFG may concentrate.