Skip to main content

Table 4 Mixed effects logistic regression model for 2014 oyster bed surveys

From: Exploring the decline of oyster beds in Atlantic Canada shorelines: potential effects of crab predation on American oysters (Crassostrea virginica)

Fixed effects

Coef.

SE

z value

P > |z|

Presence of green crab

2.48

0.89

2.79

0.005

Presence of rock crab

1.36

0.31

4.46

<0.001

Presence of mussel beds

−1.45

0.59

−2.48

0.013

Green crab and mussel interaction*

   

<0.001

Random effect

Estimate

SE

Estuary

0.56

0.29

Site

0.07

0.067

Probability ≥ chibar2 ≥ 0.001

  
  1. Random effects parameters are sites (n = 20) nested within estuaries (n = 10). Green crab, rock crab and mussel variables were included in binary form (presence/absence)
  2. * Overall interaction P value obtained with a Likelihood ratio test (chi2 = 21.3)