Ecological Archives E087-021-A2

Volker H. W. Rudolf. 2006. The influence of size-specific indirect interactions in predator–prey systems. Ecology 87:362–371.

Appendix B. Repeated-measures analyses on treatment and time effects on relative activity of prey (E. cirrigera) and both predator size classes (G. porphyriticus).  There were too few observations for statistical analysis of day activity of G. porphyriticus.

Species

Source

 

df

F

P

E. cirrigera

Day activity

Ratio

1 / 9

0.17

0.6921

   

Large GP

1 / 9

1.58

0.2404

   

Ratio × large GP

1 / 9

5.45

0.0444

   

Date

5 / 60

0.41

0.8365

   

Date × Ratio

5 / 60

0.32

0.9009

   

Date × Large GP

5 / 60

0.68

0.6529

   

Date × Ratio × large GP

5 / 60

0.24

0.9425

 

Night activity

Ratio

1 / 9

0.34

0.5422

   

Large GP

1 / 9

33.66

0.0001

   

Ratio × large GP

1 / 9

0.16

0.7675

   

Date

5 / 60

0.59

0.7077

   

Date × Ratio

5 / 60

0.13

0.9860

   

Date × Large GP

5 / 60

0.43

0.8270

   

Date × Ratio × large GP

5 / 60

0.28

0.92129

Small G. porphyriticus

Night activity

Ratio

1 / 12

1.96

0.1867

 

Large GP

1 / 12

0.03

0.8581

   

Ratio × large GP

1 / 12

0.83

0.3796

   

Date

5 / 60

1.03

0.4099

   

Date × Ratio

5 / 60

0.44

0.8190

   

Date × Large GP

5 / 60

0.72

0.6119

   

Date × Ratio × large GP

5 / 60

0.40

0.8481

Large G. porphyriticus

Night activity

Ratio

1 / 14

0.00

1.000

 

Date

5 / 70

0.70

0.6272

   

Date × Ratio

5 / 70

0.18

0.9675

   Notes: Significant treatment effects are bolded.



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