Ci-dessous, les différences entre deux révisions de la page.
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кракен [2025/04/22 22:58] (Version actuelle) 45.15.73.189 créée |
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+ | Just keep swimming [[https://kra30s.cc/|kraken tor]] | ||
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+ | For the new study, the scientists performed trials with more than 700 young salmon, or “smolts,” in the laboratory and in the field. The research team used sound-transmitting tags to remotely track hundreds of smolts in 2020 and 2021 as the fish navigated the Dal River in central Sweden. | ||
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+ | Migrating smolts swim downriver into a reservoir, hurtle over rapids and crest two dams before finally reaching the Baltic Sea. The journey takes 10 to 13 days. | ||
+ | Two major classes of pharmaceuticals — benzodiazepines and opioids — “are commonly detected in rivers and streams worldwide, including in Sweden, where our study was conducted,” Michelangeli said. | ||
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+ | Time-release implants in the smolts dispensed two drugs from these classes: clobazam and tramadol. Fish received clobazam, or tramadol, or both. A control group of smolts received implants with no drugs in them at all. | ||
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+ | “These two drugs are known to interact chemically when taken together in humans, and they often co-occur in the environment,” Michelangeli said. “This made them a good test case to explore how pharmaceutical mixtures might affect animal behaviour.” | ||
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+ | Along with the field trials, the scientists ran a laboratory-based study on 256 smolts to confirm that the implants worked as intended and that the drugs were lingering in the fishes’ bodily tissues and brains. | ||