Pasar al contenido principal

    Otolith morphological analysis cannot distinguish Antarctic toothfish (Dissostichus mawsoni) stocks in the Southern Ocean

    Solicitar acceso a documento de reunión
    Número de documento:
    WG-FSA-2019/59
    Autor(es):
    L. Wei, G.P. Zhu, T. Okuda, S. Parker, I. Slypko and S. Somhlaba
    Presentado por:
    Professor Guoping Zhu (China)
    Aprobado por:
    Dr Xianyong Zhao (China)
    Punto(s) de la agenda
    Resumen

    Fourier shape analysis was used to study the morphology of sagittal otoliths of 383 Dissostichus mawsoni from 3 Subareas using two statistical methods. Stepwise discriminant analysis showed a classification accuracy of 73.19%. Principal component analysis revealed the accumulated contribution rate of 29 principal components was 72.45%. These findings demonstrate that Fourier analysis of otolith morphology cannot distinguish the stock populations of D. mawsoni between Subareas 48.1, 48.6 and 88.1.