I am working on a catch reconstruction for two species of skate that are being assessed by the National Marine Fisheries Service this year. I'm using GAMs in MGET to estimate catch rates in regions that weren't sampled by using fishery survey data in regions that were. I have very uneven sample sizes for my catch rate estimates, and therefore would like to weight the data by sample size. I couldn't figure out a way to do that using MGET (either "Fit GAM using Formula" or "Predict GAM from raster"). Is weighting the data for a response variable (CPUE is the response variable in this case, number of trawls is the sampling unit) possible when fitting GAMs in MGET? Thank you for your time and consideration.

Best,

Joe