Almadraba fishing is a traditional and highly selective method used to catch bluefin tuna, employing fixed nets strategically placed along the fish’s migratory routes. The nets guide the tuna into a final enclosure where they are captured. While bluefin tuna is the primary target, other species such as frigate tuna, bonito, or mackerel may occasionally be caught. This system helps minimise bycatch and reduces the impact on the marine ecosystem.
Each component of the system plays a vital role in ensuring efficient and sustainable fishing. Among these, the adjustment of buoys and sinkers determines the net’s behaviour and stability against currents. The introduction of eco sinkers allows the structural balance of the almadraba to be maintained while replacing polluting materials with safer, more durable alternatives, without compromising operational performance.
Why the Perfect Adjustment is Key to Almadraba Success
A properly calibrated system of buoys and sinkers is critical for both the performance and safety of the almadraba. The balance between buoyancy and weight determines the net’s vertical position, ensuring the structure remains stable and operational throughout the fishing season.
Correct weighting allows the net to maintain its shape, facilitates selective fishing, and reduces maintenance effort. On the other hand, improper adjustment can cause deformation, loss of efficiency, or even damage to the seabed.
Nets that “float” or wave excessively due to too much buoyancy, or drag along the seabed due to insufficient weighting, negatively impact both fishing efficiency and the marine environment. For this reason, precise adjustment of buoys and eco sinkers is a key task in preparing each almadraba net.
Eco Sinkers: Safe and Durable for the Marine Environment
GreenCastSea’s eco sinkers were developed to replace traditional materials like lead with environmentally friendly alternatives. Our sinkers are made from lead-free alloys and other heavy metals, preventing the release of toxic substances in the event of loss or deterioration.
They are highly resistant to seawater corrosion, extending their service life and reducing replacement and maintenance costs. Their density and hydrodynamic properties match those of conventional sinkers, ensuring stability and durability. Eco sinkers integrate seamlessly into existing systems without altering the operational performance or technical results of the almadraba.
Benefits of Eco Sinkers in Almadraba Management
Using sustainable sinkers provides direct benefits to both the ecosystem and fishery management. By preventing heavy metal contamination, they help protect sensitive habitats, such as sandy bottoms or seagrass meadows, which are crucial for the ecological balance of fishing areas.
Additionally, eco sinkers reduce the risks associated with handling lead, improve safety for fishers, and simplify net maintenance. For operators, adopting sustainable materials demonstrates a commitment to marine conservation and can enhance the reputation of the sector, aligning it with responsible fishing practices and the principles of the blue economy.
Your Next Step Toward an Efficient and Responsible Almadraba
Using eco sinkers for buoy adjustment represents a technical and environmental improvement for modern almadrabas. Their use ensures more stable structures, reduces ecological impact, and supports regulatory compliance.
At GreenCastSea, we provide the fishing sector with specialised technical advice and solutions tailored to the conditions of each fishing ground and gear type.
Contact our team to assess the needs of your installation and determine the best solution for an efficient, safe, and environmentally responsible almadraba.