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Analyse en composantes principales de la variabilité de taille, de croissance et de conformation des espèces du complexe Jaera albifrons (crustacés isopodes) = Principal components analysis, growth and conformation variability in species of the complex Jaera albifrons (Crustacea, Isopoda)
Boitard, M.; Lefebvre, J.; Solignac, M. (1982). Analyse en composantes principales de la variabilité de taille, de croissance et de conformation des espèces du complexe Jaera albifrons (crustacés isopodes) = Principal components analysis, growth and conformation variability in species of the complex Jaera albifrons (Crustacea, Isopoda). Cah. Biol. Mar. 23(2): 115-142
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Boitard, M.
  • Lefebvre, J.
  • Solignac, M.

Abstract
    Males and females of four species of the Jaera albifrons complex as well as several categories of interspecies hybrids were studied by principal components analysis (PCA). A synthetic size factor derived from PCA was used to determine growth gradients which differ notably between sexes. PCA also allowed studying intra- and interpopulation variability and generalized allometry. Size variability is greater in females than in males but their growth directions are more similar. Populations of males are discriminated by the second principal component. The third component separates females and shows elements of conformation common to both sexes of the same species.

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