#' Juvenile Pacific ocean perch CPUE
#' This is a data set containing catch per unit of effort for juvenile (< 250 mm) Pacific
#' ocean perch in the Gulf of Alaska bottom trawl survey from 1996-2009. The data originated
#' from RACEBASE and includes the midpoint of the latitude and longitude of the tow (lat & long)
#' the survey year, the thermocline depth,the bottom water temperature, the bottom water
#' depth, the seafloor slope at the survey location, the combined catch of structure forming
#' invertebrates (sponges and corals), the water temperature at the thermocline depth, the
#' combined catch of shrimp species in the bottom trawl haul and finally catch per unit of
#' effort for juvenile POP.
#' @format A data frame with 4475 rows and 13 variables:
#' \describe{
#' \item{hauljoin}{unique haul identifier from RACEBASE}
#' \item{lat}{midpoint of haul latitude}
#' \item{long}{midpoint of haul longitude}
#' \item{year}{year of survey}
#' \item{tdepth}{depth of thermocline, in meters}
#' \item{btemp}{bottom water temperature, in degrees C}
#' \item{bdepth}{bottom depth, in m}
#' \item{slope}{slope of the seafloor at the station, in %}
#' \item{inverts}{combined catch of corals and sponges, in log(CPUE)}
#' \item{shrimp}{combined catch of shrimp species, in kg/ha}
#' \item{juvenile_POP_CPUE}{catch of juvenile Pacific ocean perch, in kg/ha}
#' \item{STRATUM}{stratum designation for haul}
#' ...
#' }
#' @source {RACEBASE}
"Juvenile_POP_Data"
#' goa.strata.area
#'
#' Table of stata area for the Gulf of Alaska
#'
#' @format A data frame with 59 rows and 4 variables:
#' \describe{
#' \item{STRATUM}{unique strata identifier from RACEBASE}
#' \item{AREA_KM2}{area of stratum in km2}
#' \item{PROP_TRAWL}{proportion of strata that is trawlable}
#' \item{DEPTH_BIN}{depth identifier}
#' ...
#' }
#' @source {RACEBASE}
"goa.strata.area"
#' ai.strata.area
#'
#' Table of stata area for the Aleutian Islands
#'
#' @format A data frame with 45 rows and 4 variables:
#' \describe{
#' \item{STRATUM}{unique strata identifier from RACEBASE}
#' \item{AREA_KM2}{area of stratum in km2}
#' \item{PROP_TRAWL}{proportion of strata that is trawlable}
#' \item{DEPTH_BIN}{depth identifier}
#' ...
#' }
#' @source {RACEBASE}
"ai.strata.area"
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