Ecological Archives E090-076-A1

E. G. LeBrun, R. M. Plowes, and L. E. Gilbert. 2009. Indirect competition facilitates widespread displacement of one naturalized parasitoid of imported fire ants by another. Ecology 90:1184–1194.

Appendix A. Table of parameter estimates for the relationships between the distance a sampling point lay from the Pseudacteon curvatus release site (BFL) and the density of Pseudacteon species present.

TABLE A1. Parameter estimates for the relationships between the distance a sampling point lay from the P. curvatus release site (BFL), expressed as the percentage of the distance to the edge of the expanding P. curvatus population, and the log of the average number of Pseudacteon caught on traps at that point. Parameter estimates for both Pseudacteon species on both transects are shown. These functions are displayed in Fig. 3 of the manuscript.

Transect

Species

Sex

Parameter

Parameter
Estimate

Standard Error
of Estimate

P

Overall
model R2

East

P. curvatus

Females

Intercept

2.84

0.36

0.0001

0.55

Spread distance

-3.18

0.75

0.0007

P. tricuspis

Females

Intercept

0.68

0.15

0.0005

0.54

Spread distance

1.33

0.32

0.0007

Males

Intercept

0.55

0.19

0.01

0.58

Spread distance

1.77

0.39

0.0004

Southwest

P. curvatus

Females

Intercept

3.83

0.19

0.0001

0.85

Spread distance

-2.44

0.27

0.0001

(Spread distance -0.54)2

-5.45

1.06

0.0001

P. tricuspis

Females

Intercept

0.82

0.11

0.0001

0.82

Spread distance

1.41

0.16

0.0001

(Spread distance -0.54)2

1.60

0.62

0.02

Males

Intercept

0.72

0.13

0.0001

0.85

Spread distance

1.83

0.19

0.0001

(Spread distance -0.54)2

2.52

0.74

0.003


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