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Age Determination Methods for Northwest Atlantic Species

This manual documents age-determination techniques used by staff at the Woods Hole Laboratory to conduct age and growth studies and determine the age of various species from New England and the Mid-Atlantic regions.

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Survey tow net is hauled up with catch for sorting and processing After each survey tow, the net is retrieved and the catch is emptied into a hopper where a series of conveyors move the catch to the sorting and processing area aboard the NOAA Ship Henry B. Bigelow. There, scientists sort the catch and collect data and biological samples. Credit: NOAA Fisheries/Jessica Blaylock
 Color image taken during daylight from the upper deck of a research vessel, facing toward the rear of the vessel as it sails through a canal. Land is visible on each side of the canal, and the ship leaves a wake in the water. Two steel framed bridges are in the image. The ship has just passed under the bridge used by vehicles. The railroad bridge is in the distance. View over the stern of the NOAA Ship Henry B. Bigelow, exiting the Cape Cod Canal headed east toward Provincetown, Mass. at the beginning of Leg 3 of the 2021 Northeast Fisheries Science Center fall bottom trawl survey. The two bridges spanning the canal are used by trains (background) and vehicle traffic (foreground). Credit: NOAA Fisheries/Katelyn Depot.