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Table 5 Mixed effects logistic regression model for the field experiments conducted in Boughton River

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

Outcome (dead or alive) Coef. SE z P > |z|
Fixed effects
 Trial
  2 1.64 0.27 6.04 <0.001
 Treatment
  2 3.15 0.93 3.37 0.001
  3 −1.76 0.99 −1.78 0.075
 Trial and treatment interaction*     <0.001
Random effect Estimate SE
Experimental unit 2.16 0.95
Probability ≥ chibar2 ≥ 0.001   
  1. Two trials of 18 experimental units with three treatment groups (6 units per treatment). Treatment groups were: Group 1: Oysters in the open environment (reference), Group 2: Oysters in cage with crabs (positive control), and Group 3: Oysters in cage with no crabs (negative control). Trial 1 (reference)—29 July to 12 August, Trial 2—14 August to 28 August 2015
  2. * Overall interaction P value obtained with a Likelihood ratio test (chi2 = 97.89)