Drug and pesticide usage for sea lice treatment in salmon aquaculture sites in a Canadian province from 2016 to 2019
Abstract We used 4 years of publicly available data (2016–2019) on chemical usage at salmon sites with information on production, stocking, locations and environmental conditions to explore patterns of anti-sea lice treatments in a Canadian province. Results show that sequential chemical treatments...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2022-03-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-08538-w |
| _version_ | 1818315384393039872 |
|---|---|
| author | Dounia Hamoutene Vanessa Oldford Sebastien Donnet |
| author_facet | Dounia Hamoutene Vanessa Oldford Sebastien Donnet |
| author_sort | Dounia Hamoutene |
| collection | DOAJ |
| description | Abstract We used 4 years of publicly available data (2016–2019) on chemical usage at salmon sites with information on production, stocking, locations and environmental conditions to explore patterns of anti-sea lice treatments in a Canadian province. Results show that sequential chemical treatments are prevalent, emamectin benzoate (EMB) with azamethiphos being the most used combination with a decrease in ivermectin usage. Relatively high rates of usage of EMB per fish biomass may point to potential lice resistance patterns with information needed on mechanisms and local populations. Lower or no chemical usage at some sites indicate less sea lice infestations likely influenced by localized site conditions (coves), and a lessened need for medication due to the usage of cleaner fish and possibly other non-chemical methods (not documented in this report). The year/climate influenced chemical input only in sites with higher treatment levels likely due to effects on sea lice growth and reproduction. Observed differences between years are warmer surface temperature in the fall, a higher freshwater input in spring, and stronger wind conditions for 2017 and 2018 with more medication usage for these two years. The lack of significant effect of site distances calculated in zones of influence based on 24 h potential connectivity patterns highlight the need to refine the resolution of hydrodynamic processes. |
| first_indexed | 2024-12-13T09:04:41Z |
| format | Article |
| id | doaj.art-c2e948b7127f4223bccc5c952179d59d |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-13T09:04:41Z |
| publishDate | 2022-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-c2e948b7127f4223bccc5c952179d59d2022-12-21T23:53:05ZengNature PortfolioScientific Reports2045-23222022-03-0112111510.1038/s41598-022-08538-wDrug and pesticide usage for sea lice treatment in salmon aquaculture sites in a Canadian province from 2016 to 2019Dounia Hamoutene0Vanessa Oldford1Sebastien Donnet2Saint Andrews Biological Station, Fisheries and Oceans CanadaNorthwest Atlantic Fisheries Center, Fisheries and Oceans CanadaNorthwest Atlantic Fisheries Center, Fisheries and Oceans CanadaAbstract We used 4 years of publicly available data (2016–2019) on chemical usage at salmon sites with information on production, stocking, locations and environmental conditions to explore patterns of anti-sea lice treatments in a Canadian province. Results show that sequential chemical treatments are prevalent, emamectin benzoate (EMB) with azamethiphos being the most used combination with a decrease in ivermectin usage. Relatively high rates of usage of EMB per fish biomass may point to potential lice resistance patterns with information needed on mechanisms and local populations. Lower or no chemical usage at some sites indicate less sea lice infestations likely influenced by localized site conditions (coves), and a lessened need for medication due to the usage of cleaner fish and possibly other non-chemical methods (not documented in this report). The year/climate influenced chemical input only in sites with higher treatment levels likely due to effects on sea lice growth and reproduction. Observed differences between years are warmer surface temperature in the fall, a higher freshwater input in spring, and stronger wind conditions for 2017 and 2018 with more medication usage for these two years. The lack of significant effect of site distances calculated in zones of influence based on 24 h potential connectivity patterns highlight the need to refine the resolution of hydrodynamic processes.https://doi.org/10.1038/s41598-022-08538-w |
| spellingShingle | Dounia Hamoutene Vanessa Oldford Sebastien Donnet Drug and pesticide usage for sea lice treatment in salmon aquaculture sites in a Canadian province from 2016 to 2019 Scientific Reports |
| title | Drug and pesticide usage for sea lice treatment in salmon aquaculture sites in a Canadian province from 2016 to 2019 |
| title_full | Drug and pesticide usage for sea lice treatment in salmon aquaculture sites in a Canadian province from 2016 to 2019 |
| title_fullStr | Drug and pesticide usage for sea lice treatment in salmon aquaculture sites in a Canadian province from 2016 to 2019 |
| title_full_unstemmed | Drug and pesticide usage for sea lice treatment in salmon aquaculture sites in a Canadian province from 2016 to 2019 |
| title_short | Drug and pesticide usage for sea lice treatment in salmon aquaculture sites in a Canadian province from 2016 to 2019 |
| title_sort | drug and pesticide usage for sea lice treatment in salmon aquaculture sites in a canadian province from 2016 to 2019 |
| url | https://doi.org/10.1038/s41598-022-08538-w |
| work_keys_str_mv | AT douniahamoutene drugandpesticideusageforsealicetreatmentinsalmonaquaculturesitesinacanadianprovincefrom2016to2019 AT vanessaoldford drugandpesticideusageforsealicetreatmentinsalmonaquaculturesitesinacanadianprovincefrom2016to2019 AT sebastiendonnet drugandpesticideusageforsealicetreatmentinsalmonaquaculturesitesinacanadianprovincefrom2016to2019 |