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Heatwave batters Spain’s Mediterranean mussel crop

There’s nothing left here,” sighs Javier Franch as he shakes the heavy rope of mussels he’s just pulled to the surface in northeastern Spain. They are all dead.

With the country hit by a long and brutal heatwave this summer, the water temperature in the Ebro Delta, the main mussels production area of the Spanish Mediterranean, is touching 30 degrees Celsius (86 degrees Fahrenheit). And any grower who hasn’t removed their mollusks in time will have lost everything.

But that’s not the worst of it: most of next year’s crop has also died in one of the most intense marine heatwaves in the Spanish Mediterranean.

By the end of July, experts said the western Mediterranean was experiencing an “exceptional” marine heatwave, with persistently hotter-than-normal temperatures posing a threat to the entire marine ecosystem.

“The high temperatures have cut short the season,” says Franch, 46, who has spent almost three decades working for the firm founded by his father, which has seen production fall by a quarter this year.

The relentless sun has heated up the mix of fresh and saltwater along Catalonia’s delicate coastal wetlands where the River Ebro flows into the Mediterranean.

On a scorching summer morning in Deltebre, one of the municipalities of the Delta, the mussel rafts — long wooden structures with ropes attached which can each grow up to 20 kilograms (44 pounds) of mussels — should be teeming with workers hurrying around during the busy season.
We lost the yield that was left, which wasn’t much, because we were working to get ahead so we wouldn’t go through this,” explains Carles Fernandez, who advises the Ebro Delta’s Federation of Mollusc Producers (Fepromodel).

“But the problem is that we’ve lost the young stock for next year and we’ll have quite a high cost overrun.”

– Millions in losses –

The heat has wiped out 150 tonnes of commercial mussels and 1,000 tonnes of young stock in the Delta, initial estimates suggest.

And producers are calculating their losses at over one million euros ($1,000,000) given they will now have to buy young mollusks from Italy or Greece for next year.

“When you have a week when temperatures are higher than 28C, there can be some mortality, but this summer it has lasted almost a month and a half,” with peak temperatures of almost 31C, says Fepromodel head Gerardo Bonet.

Source: IOL

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