From the article: 24 at a time, for a duty cycle of 3 months. > We have three measuring devices in the company and eight clams in each. In total, we “employ” 2

From the article: 24 at a time, for a duty cycle of 3 months. > We have three measuring devices in the company and eight clams in each. In total, we “employ” 200 individuals during the year. This other article[1] says they get them from a lake, and are returned to the same lake after three months. They are marked so the scientists won’t pick up the same clam twice. 1: https://www.boredpanda.com/clams-measure-water-quality-poland-fat-kathy/ https://www.boredpanda.com/clams-measure-water-quality-polan...