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First published online October 19, 2007
Journal of Experimental Biology 210, 3830-3837 (2007)
Published by The Company of Biologists 2007
doi: 10.1242/jeb.007328
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Diurnal and nocturnal prey luring of a colorful predator

Chih-Yen Chuang1, En-Cheng Yang2 and I-Min Tso1,3,*

1 Department of Life Science, Tunghai University, Taichung 407, Taiwan
2 Department of Entomology, National Taiwan University, Taipei 105, Taiwan
3 Center for Tropical Ecology and Biodiversity, Tunghai University, Taichung 407, Taiwan


Figure 1
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  		Fig. 1. Dorsal (A) and ventral (B) views of a colorful sit-and-wait predator, the giant wood spider Nephila pilipes (Araneae: Tetragnathidae).

 

Figure 2
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  		Fig. 2. Mean (±s.e.m.) nocturnal achromatic and chromatic contrast values (in arbitrary units, a.u.) of various body parts of Nephila pilipes viewed against green vegetation by lepidopteran insects. BP, black paint used to alter the color signals of body parts 1, 2 and 3. Letters represent results of ANOVA and LSD mean comparisons.

 

Figure 3
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  		Fig. 3. Mean (±s.e.m.) diurnal (A,C) and nocturnal (B,D) insect interception rates of webs of Nephila pilipes in experiments manipulating spider presence (A,B) and color signal (C,D). *P<0.05.

 

Figure 4
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  		Fig. 4. (A,B) Mean (±s.e.m.) nocturnal prey interception rates of webs of Nephila pilipes in the spider-present (A) and control (B) groups. (C–F) Mean (±s.e.m.) body length of diurnal and nocturnal prey in the spider-present (C), control (D), spider-absent (E) and experimental (F) groups, in the first (C,E) and second (D,F) field experiments. NS, not significant; **P<0.01, ***P<0.0001.

 




© The Company of Biologists Ltd 2007