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Table 2 Predictors of parasite prevalences and morphotype richness in the dry and rainy season

From: Host sex and age influence endoparasite burdens in the gray mouse lemur

  

Dry season

Rainy season

  

β

SE

z

P

β

SE

z

P

Subulura

Intercept

−0.983

0.610

−1.610

0.107a

−2.047

0.668

−3.063

0.002 b

prevalence

Sex (ref. female)

1.481

0.322

4.600

<0.001

0.388

0.423

0.919

0.358

 

Age

−0.500

0.614

−3.049

0.002

−0.232

0.299

−0.775

0.438

 

Year

−0.835

0.400

−2.087

0.037

1.841

0.441

4.179

<0.001

 

Sample mass

0.218

0.203

1.078

0.281

0.057

0.287

0.199

0.842

 

Body mass

-

-

-

-

-

-

-

-

 

Sex*Age

-

-

-

-

-

-

-

-

Trichuris

Intercept

−7.399

2.861

−2.586

0.010 c

−20.976

12.078

−1.737

0.082 d

prevalence

Sex (ref. female)

1.870

1.612

1.160

0.246

-

-

-

-

 

Age

−0.248

0.735

−0.338

0.735

4.557

5.139

0.887

0.375

 

Year

0.021

1.391

−0.015

0.988

-

-

-

-

 

Sample mass

0.245

0.637

0.385

0.700

−1.803

1.549

−1.164

0.245

 

Body mass

2.103

1.239

1.696

0.090

-

-

-

-

 

Sex*Age

-

-

-

-

-

-

-

-

Hymenolepis

Intercept

−1.618

0.676

−2.393

0.017 e

0.512

0.797

0.642

0.521f

prevalence

Sex (ref. female)

0.736

0.331

2.224

0.026

−1.395

0.651

−2.145

0.032

 

Age

−0.844

0.197

−4.284

<0.001

0.029

0.391

0.074

0.941

 

Year

0.595

0.441

1.348

0.178

−0.638

0.471

−1.355

0.175

 

Sample mass

−0.067

0.198

−0.341

0.733

0.253

0.341

0.744

0.457

 

Body mass

3.883

1.220

3.184

0.001

−2.802

1.228

−2.282

0.023

 

Sex*Age

-

-

-

-

2.484

0.991

2.507

0.012

Morphotype

Intercept

−0.210

0.313

−0.669

0.503g

0.013

0.393

0.033

0.973h

richness

Sex (ref. female)

0.722

0.165

4.383

<0.001

−0.408

0.269

−1.516

0.130

 

Age

−0.341

0.094

−3.632

<0.001

−0.157

0.200

−0.787

0.432

 

Year

−0.222

0.200

−1.106

0.269

0.428

0.242

1.769

0.077

 

Sample mass

0.133

0.098

1.353

0.176

0.132

0.174

0.756

0.450

 

Body mass

0.272

0.143

1.901

0.057

−0.431

0.173

−2.496

0.013

 

Sex*Age

-

-

-

-

0.705

0.419

1.682

0.092

  1. a N = 253 / 113 /66 (samples/ individuals/ infected); R2 marginal = 0.224, R2 conditional = 0.224, σ2 < 0.001
  2. b N = 217/ 93/121; R2 marginal = 0.176, R2 conditional = 0.281, σ2 = 0.481
  3. c N = 253/ 113/41; R2 marginal = 0.025, R2 conditional = 0. 968, σ2 = 96.900
  4. d N = 148/ 66/14; R2 marginal = 0.014, R2 conditional = 0. 995, σ2 = 649.600; infections observed only in females in year 2012, hence non-convergence if year and sex appear as fixed terms
  5. e N = 235/ 110/82; R2 marginal = 0.206, R2 conditional = 0.253, σ2 = 0.206
  6. f N = 154/ 88/57; R2 marginal = 0.147, R2 conditional = 0.147, σ2 < 0.001
  7. g N = 235 samples /110 individuals, R2 marginal = 0.212, R2 conditional = 0.274, σ2 = 0.006
  8. h N = 154 samples/88 individuals, R2 marginal = 0.192, R2 conditional = 0.192, σ2 < 0.001
  9. Predictions are based on the final, reduced models of the prevalences of the three common parasite morphotypes and morphotype richness after dropping the terms age*sex and body mass where they had non-significant (P > 0.1) effects (empty cells). P-values for significant predictors at significance threshold P < 0.05 shown in bold