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Interlopers are coming into California by land, by sea … and by FedEx. That’s what happened with the European green crab, a voracious cannibal that stowed away in packages of worms sent by overnight delivery to commercial fishermen in California. Unknown to anyone, the tiny crustaceans were concealed in seaweed that wrapped the cargo and were freed into the Pacific when fishermen tossed it overboard. Then the green crabs, which a century ago decimated the East Coast’s shellfish industry, began to dine out in the Pacific, munching nearly everything in sight. Authorities made plans to rid the ocean of the pests. ....
European green crabs arrived on the eastern shores of North America in the early 1800s, likely as ship ballast stowaways or affixed to boat hulls. They found their way to the continent’s western shores by the 1980s, and they’ve caused trouble in every new ecosystem they invade. Wherever green crabs ( Carcinus maenas) land, scientists have documented them decimating food webs by devouring benthic invertebrates that provide nourishment for shorebirds, fishes and other species. Over the years, they have eaten their way onto a list of the world’s top 100 most unwanted species. The economic toll of their appetite is large, too. European green crabs were estimated to have caused $22 million in damage a year to the East Coast commercial shellfishery alone. ....
April 18, 2021 It s nothing less than an invasion. Interlopers are coming into California by land, by sea…and by FedEx. Subscribe That s what happened with the European green crab, a voracious cannibal that stowed away in packages of worms sent by overnight delivery to commercial fishermen in California. Unknown to anyone, the tiny crustaceans were concealed in seaweed that wrapped the cargo and were freed into the Pacific when fishermen tossed it overboard. Then the green crabs, which a century ago decimated the East Coast s shellfish industry, began to dine out in the Pacific, munching nearly everything in sight. Authorities made plans to rid the ocean of the pests. ....
The Good Men Project Become a Premium Member We have pioneered the largest worldwide conversation about what it means to be a good man in the 21st century. Your support of our work is inspiring and invaluable. Are We Managing Invasive Species Wrong? New research suggests that sometimes trying to completely eliminate a problematic non-native species may cause more harm than good. European green crabs arrived on the eastern shores of North America in the early 1800s, likely as ship ballast stowaways or affixed to boat hulls. They found their way to the continent’s western shores by the 1980s, and they’ve caused trouble in every new ecosystem they invade. ....
Jump to navigation David Briggs By 04/14/2021 Scientists have given up hope on fully eradicating the invasive European green crabs that dominate the Seadrift Lagoon, after a research effort there went awry. They are now recommending keeping the population at a manageable threshold. The attempt to eliminate the species, which is ranked among the 100 worst invasives worldwide, in the lagoon was nearing success until 2014, when the population exploded by a magnitude of 30. The explanation? Scientists had focused on taking the adult crabs, but because they are cannibalistic and consume their young, their absence inadvertently allowed the population to proliferate. “A failure in science often leads to unexpected directions,” said Dr. Ted Grosholz, a professor and ecologist with the University of California, Davis. “We slapped our foreheads at the time, but with thought and understanding, it’s told us a lot about what we shouldn’t ....