A dataset containing variables collected from horizontal zooplankton tows during Juvenile Salmon Program site surveys
zoop_tows
An object of class tbl_df (inherits from tbl, data.frame) with 372 rows and 15 columns.
A unique alphanumeric code assigned to every survey. Foreign key to: survey_data.
A unique sample ID assigned and labelled onto every 250 mL PET jar that resulted from the zoop tow
The geopgraphical latitude of measurement gathered by the electronic tablet. Units: decimal degrees
The geopgraphical longitude of measurement gathered by the electronic tablet. Units: decimal degrees
The 24-hour time the zooplankton tow began. Format: hh:mm:ss
The 24-hour time the zooplankton tow ended. Format: hh:mm:ss
The duration of the zooplakton tow. Units: minutes
The serial number of the flowmeter
The revolution count of the flowmeter before begining the tow
The revolution count of the flowmeter after finishing the tow
The number of revolutions of the flowmeter that occured during the tow. The difference between flowmeter_in and flowmeter_out.
The volume of water sampled taking in to account on the flowmeter count, the calibration coefficient of the flowmeter, and the size of the net.
A modelled estimate of the volume sampled. Early season in 2015 the flowmeter was not working, so volume was modeled based on tow duration and secchi depth. The R script of this model is available upon request
Raw infers there is no way to check the quality of the data and no guarantee of accuracy is possible, use at your own risk. Technician infers that the data has passed an initial QA/QC level
Comments regarding the Quality level