Ecological Archives E085-078-A2

Masaya Matsumura, Genevieve M. Trafelet-Smith, Claudio Gratton, Deborah L. Finke, William F. Fagan, and Robert F. Denno. 2004. Does intraguild predation enhance predator performance? A stoichiometric perspective. Ecology 85:2601–2615.

Appendix B. ANOVA results for the effect of diet (herbivore prey, intraguild prey, or a mix of the two), time, and their interaction on Pardosa mass, mass gain, capture rate of prey, biomass of prey consumed, and nitrogen intake.

Dependent Variable
Diet (Fdf, P)
Time (Fdf, P)
Diet × Time (Fdf, P)
 
A) Experiment one (three diet treatments: Prokelisia herbivores, Grammonota predators, or mixed diet)
Mass
6.662,26 (0.005)
105.6210,12 (<0.0001)
5.8620,16 (0.0005)
Mass gain
3.112,24 (0.063)
10.199,15 (<0.0001)
2.5318,21 (0.022)
Number prey captured
46.562,26 (<0.0001)
20.539,202 (<0.0001)
4.8718,202 (<0.0001)
Prey biomass consumed
6.422,25 (0.0056)
11.869,202 (<0.0001)
2.0118,202 (0.011)
Nitrogen intake
3.572,25 (0.043)
11.769,79 (<0.0001)
2.4218,101 (0.003)
 
B)  Experiment two (three diet treatments: Prokelisia herbivores, Tytthus predators, or mixed diet)
Mass
4.072,35 (0.026)
59.238,27 (<0.0001)
1.1116,41 (0.374)
Mass gain
 3.512,35 (0.041)
10.217,28 (<0.0001)
0.9514,42 (0.519)
Number prey captured
 7.122,34 (0.003)
5.477,231 (<0.0001)
1.6714,231 (<0.0001)
Prey biomass consumed
 1.712,35 (0.196)
5.067,232 (<0.0001)
1.0314,232 (0.420)
Nitrogen intake
4.332,35 (0.021)
5.387,232 (<0.0001)
1.2514,232 (0.243)

   Notes: Two experiments were performed: Prokelisia planthoppers were the herbivore prey in both experiments, whereas Grammonota spiders and Tytthus egg predators were the intraguild prey in experiments one (A) and two (B) respectively.  Significant P values are boldfaced.



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