Table 4 a Description of data fields associated with each Atlantic salmon farm operating on the BC coast [industry_farm_details]. b Description of data fields associated with the mean monthly sea lice abundance estimates reported from each farm [industry_farm_abundance]. (An additional file covering similar data, but typically at a weekly level and published by DFO since 2011, has also been included. See Table S2). c Description of data fields associated with the estimated median monthly sea lice ‘load’ associated with each DFO fish health zone [industry_zone_loads_median].

From: Sea lice infestation dataset for wild and farmed salmon populations on the Pacific coast of Canada (2001–2023)

Field

Description

facility_id

A unique ID associated with each farm

name

The textual name used to refer to each farm

dfozone

One of seven fish health zone codes where the farm is located

latitude

Latitude of farm location in decimal degrees (to 4 decimals places)

longitude

Longitude of farm location in decimal degrees (to 4 decimal places)

company

The textual name of the owner/operator of a given farm

region

One of ten areas along the BC coast

Field

Description

facility_id

ID that associates each record with the farm from which the data comes

year

The year to which the abundance data relate (yyyy)

month

The month for which the abundance data have been estimated (mm)

fish_selected

The number of fish involved in estimating the monthly abundances

chalimus_ab

Mean monthly abundance of all sea lice in a stage prior to becoming motiles

lep_motile_ab

Mean monthly abundance of L. salmonis in all motile stages (including L. salmonis in the adult female stage)

lep_af_ab

Mean monthly abundance of L. salmonis in the adult female stage

cal_motile_ab

Mean monthly abundance of Caligus sea lice in the motile stage

weight

A four-digit decimal, giving the proportional weighting of this farm within the zone (based on number of fish present on this site compared to the total number of farmed fish in that zone during this month/year).

Field

Description

dfozone

One of seven fish health zone codes

year

The year to which the median load data relate (yyyy)

month

The month for which the median load data have been estimated (mm)

chal_load_median*

Median monthly load of sea lice in the chalimus stages

lep_mot_load_median*

Median monthly load of L. salmonis in the motile stage (including AF)

lep_af_load_median*

Median monthly load of L. salmonis in the adult female stage

cal_mot_load_median*

Median monthly load of Caligus sea lice in the motile stage

  1. *for each of these sea lice stages, the associated mean abundance value for the given year/month is multiplied by the number of fish present on a given farm to estimate the farm ‘load’. The median value is then taken from all the farms reporting such ‘load’ estimates in each DFO zone for a given year/month and reported in this dataset.