Table 2 Result of hurdle model for the number of individuals of each wood-feeding cockroach species in each decayed wood.

P. angustipennis spadica

Count model coefficients (truncated poisson with log link)

 Intercept

0.138

0.314

0.439

0.661

 Diameter

0.264

0.135

1.959

0.050

 Decay class [4 and 5]*

− 0.176

0.359

− 0.490

0.624

 Ant

− 1.018

0.428

− 2.377

0.017

 Termite

1.312

0.331

3.969

< 0.001

 S. esakii

− 0.885

0.444

− 1.993

0.046

Zero hurdle model coefficients (binomial with logit link)

 Intercept

− 3.101

0.328

− 9.469

< 0.001

 Diameter

0.833

0.162

5.129

< 0.001

 Decay class [4 and 5]*

0.878

0.406

2.165

0.030

 Ant

0.510

0.412

1.237

0.216

 Termite

0.149

0.549

0.272

0.786

 S. esakii

1.213

0.482

2.513

0.012

S. esakii

Count model coefficients (truncated poisson with log link)

 Intercept

1.367

0.159

8.589

< 0.001

 Diameter

0.201

0.123

1.632

0.103

 Decay class [4 and 5]*

− 0.675

0.341

− 1.981

0.048

 Ant

− 0.265

0.232

− 1.140

0.254

 Termite

− 1.216

0.362

− 3.359

< 0.001

 P. angustipennis spadica

0.294

0.237

1.242

0.214

Zero hurdle model coefficients (binomial with logit link)

 Intercept

− 2.771

0.291

− 9.524

< 0.001

 Diameter

0.548

0.169

3.247

0.001

 Decay class [4 and 5]*

− 0.613

0.501

− 1.223

0.221

 Ant

0.326

0.455

0.717

0.474

 Termite

0.506

0.524

0.967

0.334

 P. angustipennis spadica

1.122

0.487

2.304

0.021