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    Methods of Age Determination for Champsocephalus gunnari Lönnberg 1905 on the South Georgia Island Shelf

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    Document Number:
    WG-FSA-89/19
    Author(s):
    Frolkina, Zh.A.
    Approved By:
    Admin Admin (Секретариат АНТКОМ)
    Accessibility Categories
    Open Access (OA)
    Review Finalised:
    Нет
    Agenda Item(s)
    Abstract

    Radii of annual elements were calculated on the basis of studying C. gunnari length frequency distribution simultaneously with the measuring of otolith radii of fish taken in July-September. This was done using specimens from strictly’ defined age groups. These radii measurements suggest an adjustment to age determination of fish longer than 30 cm with an enlarged otolith centre. An age-length key for the third quarter of the year is appended