First published online July 20, 2007
Journal of Experimental Biology 210, 2700-2705 (2007)
Published by The Company of Biologists 2007
doi: 10.1242/jeb.002121
Females do it better. Individual recognition experiments reveal sexual dimorphism in Lemur catta (Linnaeus 1758) olfactory motivation and territorial defence
Elisabetta Palagi1,* and
Leonardo Dapporto2
1 Centro Interdipartimentale Museo di Storia Naturale e del Territorio,
Università di Pisa, Via Roma 79, 56011, Calci, Pisa, Italy
2 Istituto Comprensivo Materna Elementare Media Convenevole da Prato via
1° Maggio 40, 59100, Prato, Italy

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Fig. 1. Canonical discriminant functions. Discriminant Analysis of 28 samples of
genital secretions from five Lemur catta females on the basis of the
proportions of the peaks identified using GC/FID. The percentages of the
variance explained by each of the two main functions are given in parentheses.
The arrow indicates the only sample incorrectly assigned to its own subject on
the basis of the two first functions.
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Fig. 2. Olfactory investigation performed by males and females on (A,B) group-mate
(open bars) and unfamiliar (filled bars) odours (Experiment 3a) and on (C,D)
familiar-competitor (open bars) and unfamiliar (filled bars) odours
(Experiment 3b).
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Fig. 3. Scheme summarizing the procedure to design functional experiments and
indicating the possible interpretations of the results.
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© The Company of Biologists Ltd 2007