Ecological Archives A025-086-A7

Shin-Ichiro S. Matsuzaki and Taku Kadoya. 2015. Trends and stability of inland fishery resources in Japanese lakes: introduction of exotic piscivores as a driver. Ecological Applications 25:14201432. http://dx.doi.org/10.1890/13-2182.1

Appendix G. Summary of the best-fit generalized linear mixed models for the relationships between cpue changes or stability indices and the predictor variables.

Table G1. Summary of the best-fit generalized linear mixed models for the relationships between cpue changes or stability indices and the predictor variables over 10 (1998–2008), 20 (1988–2008), and 30 (1978–2008) years.

Response variables

Predictors

Estimate

SE

tvalue

CPUE changes

 

 Over 10 years

Intercept

-0.93

0.57

-1.64

 

FGR of exotic piscivores

-0.44

0.15

-3.00

 

Lake area

0.25

0.14

1.82

 

Total phosphorus

7.34

4.35

1.69

 

(Variances in the random variable and residual were 0.89 and 0.75, respectively)

 

 

 Over 20 years

Intercept

1.32

0.78

1.70

 

Lake area

0.29

0.13

2.15

 

Maximum depth

-0.01

0.00

-2.50

 

Brackish / freshwater

-1.33

0.51

-2.61

 

The percent coverage of concrete bank protection

-0.02

0.01

-2.11

 

FGR of exotic piscivores

-0.49

0.16

-2.99

 

(Variances in the random variable and residual were 0.80 and 0.76, respectively)

 

 

 Over 30 years

Intercept

1.68

0.93

1.81

 

Lake area

0.32

0.16

2.03

 

Maximum depth

-0.01

0.00

-2.67

 

Brackish / freshwater

-1.25

0.61

-2.05

 

The percent coverage of concrete bank protection

-0.02

0.01

-1.79

 

FGR of exotic piscivores

-0.59

0.20

-3.02

 

(Variances in the random variable and residual were 1.14 and 0.84, respectively)

 

 

CPUE stability: CV-1

 

 Over 10 years

Intercept

1.85

0.40

4.58

 

Lake area

0.26

0.08

3.25

 

Maximum depth

-0.01

0.00

-2.59

 

Brackish / freshwater

-0.50

0.28

-1.76

 

FGR of exotic piscivores

-0.28

0.09

-2.91

 

(Variances in the random variable and residual were 0.29 and 0.49, respectively)

 

 

 Over 20 years

Intercept

0.25

0.37

0.69

 

Lake area

0.25

0.06

3.84

 

Catchment : lake area ratio

0.17

0.10

1.80

 

FGR of exotic piscivores

-0.10

0.07

-1.58

 

(Variances in the random variable and residual were 0.20 and 0.31, respectively)

 

 

 Over 30 years

Intercept

0.54

0.21

2.54

 

Lake area

0.19

0.05

3.65

 

Total phosphorus

3.51

1.62

2.17

 

FGR of exotic piscivores

-0.11

0.05

-2.07

 

(Variances in the random variable and residual were 0.12 and 0.21, respectively)

 

 

CPUE stability: SDchange rate

 

 Over 10 years

Intercept

-3.68

0.32

-11.50

 

Maximum depth

0.00

0.00

2.46

 

Brackish / freshwater

0.48

0.24

1.98

 

FGR of exotic piscivores

0.20

0.08

2.54

 

(Variances in the random variable and residual were 0.21 and 0.30, respectively)

 

 

 Over 20 years

Intercept

-2.72

0.23

-11.60

 

Lake area

-0.12

0.07

-1.79

 

FGR of exotic piscivores

0.15

0.07

2.07

 

Maximum depth

0.00

0.00

2.23

 

(Variances in the random variable and residual were 0.22 and 0.22, respectively)

 

 

 Over 30 years

Intercept

-2.49

0.10

-24.91

 

(Variances in the random variable and residual were 0.22 and 0.15, respectively)


[Back to A025-086]