Realm: Marine
Climate: Temperate
Biome: Temperate shelf and seas ecoregions
Central latitude: 56.500000
Central longitude: -168.150000
Duration: 12 years, from 1993 to 2004

419940 records

355 distinct species

Across the time series Gadus macrocephalus is the most frequently occurring species

Methods

The Observer Program database consists of fish. invertebrate. and marine mammal observations collected by fishery biologists while deployed on board commercial fishing vessels or at shoreside processing plants participating in the Bering Sea and Gulf of Alaska groundfish fisheries. This database covers observations from 1993-2004. The specific data components collected are outlined in the Groundfish Observer Manual. Once received by NOAA Fisheries. these data are extensively checked for quality. Each record represents the summary of all the observations made for a given taxa in a given year from each 20km by 20km grid square; counts and weights are statistical estimates.Over 300 certified groundfish observers each year on a variety of commercial fishingvessels. over 37.000 data collection days annually. Unit of abundance = IndCountInt, Unit of biomass = Weight

Citation(s)

"The Observer Program database", accessed through the OBIS-USA North Pacific Groundfish Observer (North Pacific Research Board). Available at: http://www.iobis.org, accessed 2012.