Biodiv Sci ›› 1997, Vol. 05 ›› Issue (1): 67-71.DOI: 10.17520/biods.1997011

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The principal components and discriminant analysis of numerical characters of Locusta migratoria Migratoria L. and L.m.manilensis (Meyen) phase solitaria

Liu Zhibin,Zheng Zheming,Wang Qingchuan   

  1. 1)Institute of Zoology,Shaanxi Normal University,Xian 710062
    2)Department of Mathematics,Shaanxi Normal Universtiy,Xian 710062
  • Received:1995-05-04 Revised:1996-07-17 Online:1997-02-20 Published:1997-02-20

Abstract:

In this paper,11 numerical characters of Locustaphase solitaria from morthwest and southwest of China were studied by means of principal components analysis (PCA) and discriminant analysis (DA).PCA shows that,on the individual level,Locusta have a continous variation in space.Considering the difficulity we met in the identification of L.migratoria migratoria L.and L.m.manilensis (Meyen) by using the traditional morphometric method,two linear discriminant functions were calculated for female and male respectively:
V(female)= - 35.37C+2.72Mx - 1.71V+4.31E/F;
V(male)= - 17.22+9.11H - 5.64P - 1.05F+3.17Mz.
Here,if V(female or male)<0,the individual belongs to L.m.migratoria, otherwise,it belongs to L.m.manilensis.In addition,by using the discriminant functions,the nature of some Locusta areas of  China was analysised preliminarily.

Key words: fishery status, sustainable utilization, Selincuo Lake, northern Tibet