Ecological Archives E094-056-A1

Douglas F. Fraser, Bradley A. Lamphere. 2013. Experimental evaluation of predation as a facilitator of invasion success in a stream fish. Ecology 94:640–649. http://dx.doi.org/10.1890/12-0803.1

Appendix A. Summary statistics for each species combination used in competition assays.

TABLE A1. Summary statistics for each species combination used in competition assays. Initial conditions include (a) the number of bins with each species combination and the average initial mass of (b) Rivulus and (c) guppies in each combination. Average per- gram growth data are given for (d) Rivulus and (e) guppies. Two G1 bins and the Rivulus from one R1:G3 bin were lost during the experiment and excluded from subsequent analyses.

 

 

 

Number of Rivulus

   

0

1

2

3

4

6

7

8

   

a. Number of bins

Number
of
guppies

0

 

4

3

2

1

   

1

1

6

6

3

2

   

1

 

2

3

 

7

   

1

   

3

3

3

1

2

       

4

1

     

1

     

6

   

1

         

7

 

1

           

8

1

 

 

 

 

 

 

 

   

b. Initial Rivulus mass (g)

Number
of
guppies

0

 

0.129

0.282

0.347

0.572

   

1.065

1

 

0.141

0.244

0.452

   

0.891

 

2

 

 

0.304

   

0.747

   

3

 

0.153

0.306

0.313

       

4

 

     

0.445

     

6

 

 

0.199

         

7

 

0.245

           

8

 

 

 

 

 

 

 

 

   

c. Initial guppy mass (g)

Number
of
guppies

0

0.103

0.081

0.114

0.095

   

0.119

 

1

0.199

 

0.221

   

0.216

   

2

0.356

0.269

0.331

0.265

       

3

0.359

     

0.408

     

4

 

 

0.705

         

6

 

0.634

           

7

0.883

             

8

 

 

 

 

 

 

 

 

   

d. Rivulus growth (g / g / 30 d)

Number
of
guppies

0

 

0.294

0.165

0.100

0.130

   

-0.028

1

 

0.255

0.158

0.116

   

-0.014

 

2

 

 

0.184

   

0.003

   

3

 

0.240

0.092

0.059

       

4

 

     

0.013

     

6

 

 

-0.026

         

7

 

0.120

           

8

 

 

 

 

 

 

 

 

   

e. Guppy growth (g / g / 30 d)

Number
of
guppies

0

 

             

1

0.073

0.052

0.019

0.046

   

-0.050

 

2

0.084

 

0.041

   

-0.020

   

3

0.020

0.035

0.021

-0.002

       

4

0.056

     

-0.001

     

6

 

 

-0.024

         

7

 

0.002

           

8

-0.013

             

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