"Perfect Storm" under the midnight sun triggered marine heatwave and… On August 5, 2024, a marine heatwave began along the coast of Lofoten in Northern Norway. It lasted for 21 days, with sea temperatures measured at a…

"Perfect Storm" under the midnight sun triggered marine heatwave and explosion of salmon lice
bjerknes.uib.no/en/news/perf...
#swgreen #svpol #lax #laxlus #odladlax #klimat #salmon #salmonlice #farmedsalmon #climate

7/12
Our models predicted that for smaller trout (around 30g), the likelihood of fin damage rose from 25% to 75% with increasing lice count. For larger trout (500g), damage likelihood jumped to nearly 100% in areas with high lice loads. #SalmonLice

2/12
This study assessed dorsal fin injuries on sea trout and their connection to lice infestations near fish farms. By analyzing over 5500 trout in Hardangerfjord, Norway, we documented how lice affect their health and population sizes. #SalmonLice

Ocean Health: First Reports of Salmon Lice Resistance in the Pacific Ocean Threatens Local Ecosystems - Beyond Pesticides Daily News Blog (Beyond Pesticides, April 12, 2022) A recent study published in Scientific Reports warns that parasitic salmon lice (Lepeophtheirus salmonis) in Pacific Ocean open-net fish farming operations are becoming resistant to emamectin benzoate (EMB), an active ingredient used to control salmon lice population in North America, both in the U.S. and British Columbia, Canada. Previously, researchers believed parasitic salmon lice only had high rates of chemical resistance in the Atlantic region due to the mixing of farmed and wild salmon. However, Pacific salmon lice are exhibiting similar rates of decreased sensitivity to EMB from various sources, including a decrease in the wild Pacific salmon population, overuse of chemical treatments, and reliance on single chemical treatments. The aquaculture industry (e.g., farmed seafood/fish) repeatedly faces sustainability issues, failing to adhere to environmental regulations and threatening marine health. Extensive use of pesticides to rid the parasite has led to widespread resistance to multiple pesticides, prompting increasing infection rates among North Atlantic salmon populations. These parasites endanger both farmed salmon and wild salmon, in addition to other local species of fish. In this context, pesticide treatments contributes to resistance among lethal pest populations, especially in ecologically vulnerable and interconnected ecosystems like ocean basins. The researchers caution, “Salmon […]

#Pacificsalmon #lice exhibit decreased sensitivity to #EMB from various sources coupled with a decrease in #wildPacificsalmon population, overuse of chemical treatments, and reliance on single chemical treatments. #pesticides #ocean #salmonlice

beyondpesticides.org/dailynewsblog/…