Two experimental fish aggregating systems (fads) in the Aegean sea: their design and application

Abstract

A B S T R A C TTwo steel spar buoys were constructed and moored in 50 and 100 m deep of water in the Aegean Sea to support recreational fisheries. The first FAD was deployed at coordinates 38°01´48´´N 26°58´02´´E and at a distance of 3 nautical miles from the shoreline. The other FAD was moored at 1.1 nautical miles from the shoreline at coordinates 38°03´11´´N; 26°59´01´´E. An anchor (1.2x1.2x0.8 m3) weighing approximate 2.76 metric ton, made of reinforced concrete, was used to hold a FAD weighing approximate 1.5 metric ton. Hardware and connections of FADs, ropes, mooring calculation and anchor design were made. The interaction between the forces of wave and current and FADs in those waters was investigated. In the experiment, all forces (drag force, buoyancy force etc.) acting on FADs were calculated. It is proposed that the construction of the FADs should take the following design criteria into consideration: wave and current, forces related to the FADs, deployment depth, mooring hardware and ropes. This knowledge provides an important reference for stakeholders performing projects aiming to increase the performance and service life FADs.

CARAH (International Conference on Artificial Reefs and Related Aquatic Habitats): an historical perspective of accomplishments

“…Çiçek () presented an ongoing study to involve commercial fishing communities in the design of artificial reefs in the management of a local fishery. Fish aggregating systems (FADs) continued to draw the attention of researchers and emphasized the importance of oceanographic factors when deploying FADs (Özgül et al., )…”

The ODAS Italia 1 buoy: More than forty years of activity in the Ligurian Sea

“…FADs are objects suspended in the water column or floating on the surface to attract pelagic or semi-pelagic fishes. These systems are capable of aggregating a large number of schools of migratory fish (Özgül et al, 2011;Dempster, 2005;Andaloro et al, 2007). The underwater part of the ODAS Italia 1 buoy acting as a ''small island'' is both a surface for colonisation of biofouling organisms and a FAD (Fig.…”

Artificial reef application from the Iskenderun Bay, Northeastern Mediterranean, Turkey; an experimental study

“…Artificial reefs improve marine fisheries through both aggregation and production of marine resources [15]. FADs can also improve resource production [16,17]. Artificial reefs range widely in design.…”