Key facts
- Italian fishermen are now exporting invasive Atlantic blue crabs after previously incinerating most catches.
- The blue crab invasion has devastated local Manila clam and mussel populations in Italy's Po River Delta.
- Climate change, specifically warmer waters and altered salinity, has been identified as a key factor in the crab population explosion.
- An eradication program involving incineration proved ineffective due to the crabs' high reproductive rate.
- Fishermen are now selling crabs, primarily to Sri Lanka for processing, to salvage their livelihoods.
- The new crab export strategy is projected to generate significant revenue for fishing cooperatives.
Italian fishermen are finding a new market for the invasive Atlantic blue crab, which has devastated local clam and mussel populations. For two years, most of the crabs caught in the Po River Delta were incinerated due to a lack of local appetite for the alien predator. However, facing a 75% drop in revenue and a significant reduction in active members, fishing cooperatives have pivoted to exporting the crustaceans.
The strategy, led by cooperatives like the Polesine Fishermen’s Cooperative Consortium, aims to salvage livelihoods and preserve the native mollusk industry. Fishermen are now selling every crab they catch, with projections of 20 million euros in revenue this year, primarily from crab sales. The crabs are processed and shipped to markets like Sri Lanka, where workers extract the meat for export.
Experts attribute the blue crab explosion to climate change, with warmer waters favoring reproduction and drought-induced drops in river levels allowing saltwater intrusion into freshwater tributaries, creating ideal conditions. Previous eradication efforts, including incineration and the release of octopus predators, have had limited success due to the crabs' high reproductive potential.
While the export market is currently keeping fishermen afloat, earnings from crab are significantly lower than from the prized clams. Efforts are also underway to change Italian consumer perceptions and introduce blue crab into the local diet, though it remains largely absent from top restaurants.