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AFSC/REFM: Pacific cod Localized Depletion Study
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Data from Localized Depletion study for Pacific cod 2001-2005. Study was conducted
using cod pot gear to measure localized abundance of Pacific cod inside and outside
of a trawl exclusion zone in the southeast Bering Sea, both before and after the intensive
winter season cod trawl fishery. Data includes early feasibility and gear trials
as well as before and after data from each of three years of the experiment. Pot gear
was fished in 40 fixed stations in two adjacent areas, one of which was subject to
heavy trawling and one within a trawl exclusion zone. Average of three or more pot
catches at each station for each time period (before/after) was computed, the variable
for final analysis was the change in catch at each station between the two periods.
There are three main data tables. Cruise data identifies the dates, vessels, and personnel
for each charter. Haul data includes information on location, date, soak time, and
identifier for each pot launched, while Catch data includes numbers and weight of
cod and bycatch by pot. Assorted small tables define categories for descriptive variables
in main tables. Length and maturity data were collected on a random subset of cod
catch. Some CTD profiles and oceanographic data were also collected.
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