Catch per unit effort standardization of splendid alfonsino Beryx splendens in the Emperor Seamounts

Initial estimates of standardized CPUE for splendid alfonsino in the Emperor Seamounts, with records from 2010 to 2024 by the bottom trawl and bottom gillnet fisheries. Trawl and gillnet data was analyzed separately, due to differences in record methodology and fishing history. For statistical analysis we employed a delta-gamma model utilizing the sdmTMB package to compare CPUE over time. While we found the sdmTMB delta-gamma model to fit our data well according to quantile-quantile plot, due to ongoing issues with coding, we have been unable to calculate the index values and associated uncertainty necessary for integrated modeling. Additionally, gillnet standard error for binomial component for several years were unusually large; this is likely the result of low sample size and few instances of zero-catch hauls in those years and will need to be addressed going forward. More work is necessary to further optimize the model and produce index values, so the current results are strictly preliminary.