Additional Analyses requested from last meeting.

Figure 1 Map of strata from the optimal stratification and allocation proceedure using latitude and longitude as covariates. Latitude and longitude boundaries and individual sampling sites are color coded by strata. Stratum 1 (Blue) is the most southerly and they proceed in order in a northerly direction to Stratum 8 (Dark Green).
Figure 1 Map of strata from the optimal stratification and allocation proceedure using latitude and longitude as covariates. Latitude and longitude boundaries and individual sampling sites are color coded by strata. Stratum 1 (Blue) is the most southerly and they proceed in order in a northerly direction to Stratum 8 (Dark Green).


Figure 2. Chevron trap abundance index mean annual coefficient of variation (CV) by species, sample size, reduction magnitude, and sampling scheme (Simple Random Sample=no stratification, MRT Stratified with Equal Allocation=multiple regression tree (MRT) stratification with equal sample allocation among strata, MRT Stratified with Bethel Allocation= MRT stratification with sample allocation among strata computed with the Bethel Algorithm, Optimal=Optimal stratification and allocation with latitude, longitude, and depth covariates, Optimal Latitude and Longitude=optimal stratification and allocation with latitude and longitude covariates, and Optimal Latitude and Depth=Optimal stratification and allocation with latitude and depth covariates).
Figure 2. Chevron trap abundance index mean annual coefficient of variation (CV) by species, sample size, reduction magnitude, and sampling scheme (Simple Random Sample=no stratification, MRT Stratified with Equal Allocation=multiple regression tree (MRT) stratification with equal sample allocation among strata, MRT Stratified with Bethel Allocation= MRT stratification with sample allocation among strata computed with the Bethel Algorithm, Optimal=Optimal stratification and allocation with latitude, longitude, and depth covariates, Optimal Latitude and Longitude=optimal stratification and allocation with latitude and longitude covariates, and Optimal Latitude and Depth=Optimal stratification and allocation with latitude and depth covariates).


Figure 3. Video abundance index mean annual coefficient of variation (CV) by species, sample size, reduction magnitude, and sampling scheme (Simple Random Sample=no stratification, MRT Stratified with Equal Allocation=multiple regression tree (MRT) stratification with equal sample allocation among strata, MRT Stratified with Bethel Allocation= MRT stratification with sample allocation among strata computed with the Bethel Algorithm, Optimal=Optimal stratification and allocation with latitude, longitude, and depth covariates, Optimal Latitude and Longitude=optimal stratification and allocation with latitude and longitude covariates, and Optimal Latitude and Depth=Optimal stratification and allocation with latitude and depth covariates).
Figure 3. Video abundance index mean annual coefficient of variation (CV) by species, sample size, reduction magnitude, and sampling scheme (Simple Random Sample=no stratification, MRT Stratified with Equal Allocation=multiple regression tree (MRT) stratification with equal sample allocation among strata, MRT Stratified with Bethel Allocation= MRT stratification with sample allocation among strata computed with the Bethel Algorithm, Optimal=Optimal stratification and allocation with latitude, longitude, and depth covariates, Optimal Latitude and Longitude=optimal stratification and allocation with latitude and longitude covariates, and Optimal Latitude and Depth=Optimal stratification and allocation with latitude and depth covariates).


Figure 4. Chevron trap abundance index mean annual coefficient of variation (CV) by species and sample size for simple random sampling and Optimal stratification using latitude and longitude as covariates.
Figure 4. Chevron trap abundance index mean annual coefficient of variation (CV) by species and sample size for simple random sampling and Optimal stratification using latitude and longitude as covariates.


Figure 5. Video abundance index mean annual coefficient of variation (CV) by species and sample size for simple random sampling and Optimal stratification using latitude and longitude as covariates.
Figure 5. Video abundance index mean annual coefficient of variation (CV) by species and sample size for simple random sampling and Optimal stratification using latitude and longitude as covariates.


Figure 5. True proportion of SERFS samples during last five years of sampling (2017-2019, 2021-2022) allocated to strata defined by the optimal stratification and sample allocation procedure. Optimal sample allocation proportions to each stratum (Optimal) are shown for comparison.
Figure 5. True proportion of SERFS samples during last five years of sampling (2017-2019, 2021-2022) allocated to strata defined by the optimal stratification and sample allocation procedure. Optimal sample allocation proportions to each stratum (Optimal) are shown for comparison.