SaintFortsurGironde, France, (UrduPoint / Pakistan Point News - 12th Dec, 2022 ) :At the fish farm near Bordeaux, Christophe Baudoin is running an ultrasound device over the belly of a large sturgeon to check its eggs.
"Caviar!" he shouts as the monitor shows the right sparkle around each little round ball.
"Over-mature!" comes the next shout, indicating the fish's pregnancy cycle has gone too far and the eggs have softened -- losing the crucial crunch. It will go back in the lake to await another cycle in two years.
For the company, Sturia, it's an incredibly laborious process -- they ultrasound some 20,000 fish a year for a total of 300 tonnes of caviar -- but climate change has made it vital.
Many fish are coming out "over-mature", in part because warmer waters have accelerated the pregnancy cycle.
For the guys standing in the water, scooping up the huge fish for inspection, the winter days when 10 centimetres (four inches) of ice coated the lakes are not entirely missed.
But the change is still shocking.
"It's been 10 years since we've seen any ice on these lakes," said Baudoin.
One in five of the fish died in 2021 when water temperatures hit 30 degrees, five degrees above a sturgeon's comfort zone.
"You might not know each one by name, but it's never nice to pull out a dead fish -- and of course the cost for the group is enormous," said Sturia boss Laurent Dulau.
Fished to the brink of extinction in the wild -- including the once-rich Russian and Iranian waters of the...
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