Time, location, and catch effort of sets

Source: R/data.R

A dataset containing variables collected from Juvenile Salmon Program seines

seine_data

Format

An object of class tbl_df (inherits from tbl, data.frame) with 582 rows and 27 columns.

Details

seine_id

A unique ID assigned to each seine conducted within a survey. Primary key to: fish_field_data, bycatch_mort.

survey_id

A unique alphanumeric code assigned to every survey. A survey ID may be associated with multiple seines. Foreign key to survey_data.

set_number

The order in which the seine(s) was/were deployed in a survey

set_type

Denotes whether the set was conducted upon an observed school of fish or in a random area where surface activity wasn't targetted. NA means we conducted a visual survey for surface activity but did not set upon any fish.

time_searching

Length of time visually searching for fish before setting the net (only recorded in 2015/2016). Units: minutes

set_time

Bunt time, i.e., when the trailing sternward end of the seine is tied onto the boat and a school of fish has been concentrated within the seine. Format: hh:mm:ss

lat

Location of fish capture. Format: decimal degrees

long

Location of fish capture. Format: decimal degrees

so_taken

Number of sockeye salmon retained in a seine.

so_total

Total number of sockeye caught in a seine.

pi_taken

Number of pink salmon retained in a seine.

pi_total

Total number of pink salmon caught in a seine. NA = individuals of this species were not enumerated

cu_taken

Number of chum salmon retained in a seine.

cu_total

Total number of chum salmon caught in a seine. NA = individuals of this species were not enumerated

co_taken

Number of coho salmon retained in a seine.

co_total

Total number of coho salmon caught in a seine. NA = individuals of this species were not enumerated

he_taken

Number of herring retained in a seine.

he_total

Total number of herring caught in a seine. NA = individuals of this species were not enumerated

ck_taken

Number of chinook salmon retained in a seine.

ck_total

Total number of chinook salmon caught in a seine. NA = individuals of this species were not enumerated

preservation_status

0 = one or more samples from this seine were improperly preserved in the dewar (dewar likely thawed, warming up the samples and degrading their quality). 1 = all samples were properly preserved.

fish_retained

yes = at least 1 fish had been retained from the seine. no = no fish retained (seine either failed to capture fish, or no fish were taken from a seine)

collection_protocol

The decision-making guidelines that dictate how fish were sampled in the field. Categories:

• SEMSP = standard Hakai field protocol. DFO = collection aboard the Nordic Queen purse seiner. SJUBC = Sam James UBC for diel feeding study fish collection. GM = Gideon Mordecai for fish that were targeted for collection because they appeared sick.

seine_comments

Comments related to the seine