Cooperative Research and Population Dynamics Branch Joint Seminar Series

Some perspectives on assessment issues facing Alaska groundfish management

Jim Ianelli- Senior Scientist

NOAA Alaska Fisheries Science Center- Seattle, WA


11:00 am to 12:30 PM on January 11, 2018
Clark Conference Room
NEFSC -Woods Hole, MA
866-822-6179 (toll free)
517-466-0552 (toll; international callers)
Participant code: 5003656


The two North Pacific groundfish Fishery Management Plans (FMPs) for federally managed stocks are split between two large areas and each includes 20+ stock or stock complexes. In this talk I'll provide an overview of the main categories of assessments with some focus on a couple to contrast how fishery CPUE data are used. While the number of surveys conducted in the regions are limited, some stocks require dealing with multiple non-overlapping indices. Alternative treatment for stocks whose distribution likely shifts relative to survey area coverage is also presented to illustrate the impact on uncertainty with a recent example from the Northern Bering Sea region surveyed for only the second time in 2017. Recent and developing work on spatial aspects using VAST (and INLA, Ono et al. In Press) modeling for both survey and CPUE data will be discussed. Industry relationships and information exchanges are contrasted for the federally managed fisheries with the international management of Pacific Halibut and other settings.