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    Seasonal Migration And Distribution Of Female Red King Crabs In A Southeast Alaska Estuary.

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    Author
    Stone, Robert Paul
    Chair
    Shirley, Thomas C.
    Keyword
    Zoology
    Ecology
    Biological oceanography
    Alaskan king crab
    Crabs
    Alaska
    Auke Bay
    Metadata
    Show full item record
    URI
    http://hdl.handle.net/11122/8503
    Abstract
    Seasonal movements and distribution of primiparous and multiparous red king crabs (Paralithodes camtschaticus) were monitored approximately weekly for one year in Auke Bay, Alaska, using ultrasonic biotelemetry. Patterns of seasonal movements were generally similar for all crabs, although movements of multiparous crabs were more conservative and coordinated between individuals. Groups of crabs remained in relatively discrete areas for several weeks before moving, usually as a group, to a different area. The annual range of primiparous crabs (x = 11.9 km$\sp2$) exceeded (P $<$ 0.025) that of multiparous crabs (x = 3.6 km$\sp2$). All crabs displayed distinct seasonal shifts in depth distribution and habitat use. Depth distribution was significantly correlated with photoperiod and the abrupt, synchronous movement of crabs between habitats was coincident with thermohaline mixing. Females displayed a highly aggregated distribution, especially during winter in shallowwater areas. Podding behavior of adult crabs was documented for the first time. Possible causes and functions of this highly specialized behavior are discussed. <p>
    Description
    Thesis (M.S.) University of Alaska Fairbanks, 1991
    Date
    1991
    Type
    Thesis
    Collections
    Marine Biology

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