Thanks for your reply. I do have a copy of "Zero Inflated Models and Generalized Linear Mixed Models with R" and have been using that as a guide. I applied the predict function (type="count") to the dataset for which I built the model to compare the predicted bycatch numbers to the observed to ensure I was doing things correctly. When I summed over the new predicted variable, the value is over 500 whereas there were less than 10 observed. I'd appreciate any advice regarding what I'm doing wrong.
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