R: Data: Tow Information from Pacific Ocean Perch Survey
surveyData
R Documentation
Data: Tow Information from Pacific Ocean Perch Survey
Description
EventData of Pacific ocean perch (POP) tow information (1966-89).
Usage
data(surveyData)
Format
Data frame consisting of 9 columns: PID = primary polygon ID,
POS = position of each vertex within a given polygon, X
= longitude coordinate, Y = latitude coordinate, trip
= trip ID, tow = tow number in trip, catch = catch of
POP (kg), effort = tow effort (minutes), depth = fishing
depth (m), and year = year of survey trip. Attributes:
projection = "LL", zone = 9.
Note
In R, the data must be loaded using the data function.
Source
The GFBio database, maintained at the Pacific Biological Station
(Fisheries and Oceans Canada, Nanaimo, BC V9T 6N7), archives catches
and related biological data from commercial groundfish fishing trips
and research/assessment cruises off the west coast of British Columbia
(BC).
The POP (Sebastes alutus) survey data were extracted from
GFBio. The data extraction covers bottom trawl surveys that focus
primarily on POP biomass estimation: 1966-89 for the central BC coast
and 1970-85 for the west coast of Vancouver Island. Additionally, a
1989 cruise along the entire BC coast concentrated on the collection
of biological samples. Schnute et al. (2001) provide a more
comprehensive history of POP surveys including the subset of data
presented here.
References
Schnute, J.T., Haigh, R., Krishka, B.A. and Starr, P. (2001) Pacific
ocean perch assessment for the west coast of Canada in 2001. Canadian
Science Advisory Secretariat, Research Document2001/138, 90 pp.