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    Age, growth and productivity of juvenile sockeye salmon in two high latitude lakes, Alaska

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    Wilson_L_2009.pdf
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    Author
    Wilson, Lorna I.
    Chair
    Smoker, William W.
    Committee
    Adkison, Milo D.
    Zimmerman, Christian E.
    Volk, Eric C.
    Keyword
    Sockeye salmon
    Productivity
    Growth
    Seward Peninsula
    Metadata
    Show full item record
    URI
    http://hdl.handle.net/11122/12831
    Abstract
    "The growth of Seward Peninsula sockeye salmon (Oncorhynchus nerka) from Salmon and Glacial lakes is related to their physical environment. Dermal scales collected over many years were measured to document the annual age specific growth of smolts and adults. The effect of fertilization on fry growth was examined using the first year of growth. The growth histories of Salmon Lake sockeye salmon were compared to Glacial Lake sockeye salmon through smolting and in the marine environment. Annual age specific fry growth had no direct relationship to fertilization; however, there were interactions between biomass of salmon prey and fertilization, and between prey biomass and age of smolting. Glacial Lake age-1 smolts are the same size as Salmon Lake age-1 smolts, but age-1.3 Salmon Lake juveniles after their first year in the ocean are smaller than age-1.3 Glacial Lake juveniles suggesting lower size based mortality. The differences in growth histories show each population's response to lake production and mortality experienced by smolt between the rearing lake and the ocean"--Leaf iii
    Description
    Thesis (M.S.) University of Alaska Fairbanks, 2009
    Table of Contents
    General introduction -- Sockeye salmon ecology -- Lake fertilization -- Seward Peninsula sockeye salmon -- Objectives -- 1. Lower trophic relationships and the effect of fertilization on the growth of sockeye salmon fry in a high latitude lake -- 2. Juvenile sockeye salmon (Oncorhynchus nerka) growth histories on the Seward Peninsula, Alaska -- General discussion.
    Date
    2009-12
    Type
    Thesis
    Collections
    College of Fisheries and Ocean Sciences

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