Table 2 Cause-specific mortality of male and female hispid cotton rats (Sigmodon hispidus) radio-collared in southwest Georgia, USA, from 2006–2009.

From: Mesocarnivores affect hispid cotton rat (Sigmodon hispidus) body mass

Body mass class

N avian predations

N expected avian predations

N snake predations

N expected snake predations

N mammalian predations

N expected mammalian predations

N unknown predations

N expected unknown predations

Males

Small

8

8.0

3

4.0

6

6.0

9

8.0

Large

8

8.0

5

4.0

6

6.0

7

8.0

P

 

1.00

 

0.70

 

1.00

 

0.77

Females

Small

20

16.1

6

7.4

2

4.7

9

8.7

Large

4

7.9

5

3.6

5

2.3

4

4.3

P

 

0.04

 

0.47

 

0.03

 

1.00

  1. Number of deaths attributed to each predator type is given, as is the number that would be expected if each predator type preyed among size classes at random. Small rats weighed 90–110 g and large rats were >130 g. Outcomes of Fisher’s exact tests comparing observed and expected mortality rates among size classes are given at the bottom of the table for each predator type.
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