TUNA and co

Tuna are mythical fish. Capable of crossing an ocean, they are true marathon runners. A dozen species make up the tuna group. The bluefin tuna is the emblematic species, living in temperate or cold waters, weighing several hundred kilos, while the most abundant species in the world is the skipjack, living in tropical waters. Fished for thousands of years, they represent an important fishery resource but which has suffered threats for the last two decades, in particular due to the development of industrial fisheries. One of the peculiarities of tropical tunas is that they associate with objects that float on the surface of the oceans: a behavior that is still unexplained. Fishermen make and put in the water artificial objects (called Fish Concentration Devices or FADs) to facilitate their catches, but the massive use of drifting FADs generates concerns that force the tuna commissions to control their use in order to ensure the sustainability of fisheries.