This dataset corresponds to the data collected at the vertical slot fishway in 2012, video recording marine lamprey migration
r_mig
An object of class report_mig with 8 slots:
the ref_dc
object with 4 slots filled with data corresponding to the iav postgres schema
the ref_taxa
the taxa selected
the ref_stage
the stage selected
the ref_timestep_daily
calculated for all 2015
A dataframe with 10304 rows and 11 variables
operation id
sample id
sample id
dc id
species id
stage id
the value
either effectif (number) or poids (weights)
destination of the fishes
method of data collection, measured, calculated...
A data frame with 0 observations : no quantity are reported for video recording of mullets, only numbers
A time sequence generated for the report, used internally