A comprehensive oceanographic dataset of a subpolar, mid-latitude broad fjord: Fortune Bay, Newfoundland, Canada

Donnet, Sébastien; Lazure, Pascal; Ratsimandresy, A. W.

doi:10.5194/essd-12-1877-2020

Cited by 2 publications

(1 citation statement)

References 33 publications

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“…Monthly river discharge was calculated for each treatment year and used for statistical analyses. Wind data were obtained from a weather station recently deployed in Fortune Bay (Dog Island) 76 . Dog Island available data were first filtered to remove outlier data and then resampled at 10 min interval (smallest interval used in all the available time-series).…”

Section: Methodsmentioning

confidence: 99%

Drug and pesticide usage for sea lice treatment in salmon aquaculture sites in a Canadian province from 2016 to 2019

Hamoutene

Oldford

Donnet

2022

Sci Rep

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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.

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Section: Methodsmentioning

confidence: 99%