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"Ecosystem Monitoring and Assessment Program"

Ecosystem Monitoring and Assessment Program Results

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Alaska Ecosystem Models

Scientists at the Alaska Fisheries Science Center work on several different types of models single-species, multispecies and ecosystem models that incorporate predation and bioenergetics (transfer of energy among trophic levels). Below are some of the…
Alaska

Fish Otolith Chronologies

Fish otoliths and other hard parts that form annual growth increments (annuli) in marine organisms act as natural chronometers.
Alaska
Trees with no leaves in the woods against a blue sky

Ecosystem Research In Alaska

We study Alaska ecosystems through a combination of scientific observation and model development to examine how environmental change, including climate change, affects the long-term health of fish, crabs, and other marine life and the communities that rely on them.   Our goal is to provide ecosystem information to fishermen, resource managers, and others so they can make informed decisions ensuring sustainable fisheries and maintaining ecosystem and community resiliency.
Alaska
Ship at sea with sunset behind it

Assessing Alaska Fish Stocks

NOAA Fisheries assessment scientists are responsible for determining the current status of commercial and recreationally caught fish species in the waters of Alaska from 3–200 nautical miles offshore or in federal waters.
Alaska
Group of fish after being caught

A Wealth of Scientific Information, Decades in the Making

A recent special issue journal highlights the status of an Alaska marine ecosystem more than a quarter century after the Exxon Valdez oil spill.
February 26, 2018 - Feature Story ,
Alaska
Water with mountains in the background

Alaska Fish Research Surveys

NOAA Fisheries scientists conduct a variety of ongoing field studies and surveys to help us better understand and predict marine life abundance in Alaska. We also collect a variety of information about the environment in which they live.
Alaska

Alaska Age And Growth Precision Statistics

Statistics from 1990 to 2006.
Alaska

2017 North Pacific Groundfish Stock Assessments

2017 North Pacific Groundfish Stock Assessment and Fishery Evaluation Reports for 2018 Fisheries.
Alaska

Age and Growth Fish Otolith Thin Sectioning Procedures

Thin sectioning is used to supplement the break and burn method in the age determination of rockfish species and other difficult to age species. The AFSC thin section method is a modified version of a similar thin section technique developed in Australia. The modified thin section was used to develop the ageing criteria for shortraker rockfish and Pacific cod and is currently the primary method used to age shortraker rockfish. Below is a brief description of the procedure along with accompanying photographs.
Alaska

Alaska Age and Growth Procedures for Otolith Examination

Learn more about the break-and-burn procedure for studying age and growth of otoliths.
Alaska