Forage Biomass, California Current Central

Note

Sampling effort was greatly reduced in time and space during 2020 due to COVID restrictions, and associated data reflected substantial bias for many taxa. Catches were standardized by using a Bayesian delta-GLM to estimate year effects while accounting for spatial and temporal covariates, and to estimate approximate 95% confidence limits; see Santora et al. 2021 (<a href="doi.org/10.1038/s41467-021-26484-5" target="_blank">doi.org/10.1038/s41467-021-26484-5</a>) for model approaches used to develop alternative indices in 2020.Dr.

John Field (NOAA; john.field@noaa.gov) and Tanya Rogers (NOAA; tanya.rogers@noaa.gov) from the SWFSC Rockfish Recruitment and Ecosystem Assessment Survey (RREAS; <a href="storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5" target="_blank">storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5</a>).; Additional Calculations: Samples represent catch (individuals) per standard 15 minute trawl (CPUE) from the historical core area (36.5-38.2N) of the RREAS during late spring (May to mid-June).

Data are log(CPUE+1) transformed, with geometric means calculated on non-zero data.

Note

Sampling effort was greatly reduced in time and space during 2020 due to COVID restrictions, and associated data reflected substantial bias for many taxa. Catches were standardized by using a Bayesian delta-GLM to estimate year effects while accounting for spatial and temporal covariates, and to estimate approximate 95% confidence limits; see Santora et al. 2021 (<a href="doi.org/10.1038/s41467-021-26484-5" target="_blank">doi.org/10.1038/s41467-021-26484-5</a>) for model approaches used to develop alternative indices in 2020.Dr.

John Field (NOAA; john.field@noaa.gov) and Tanya Rogers (NOAA; tanya.rogers@noaa.gov) from the SWFSC Rockfish Recruitment and Ecosystem Assessment Survey (RREAS; <a href="storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5" target="_blank">storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5</a>).; Additional Calculations: Samples represent catch (individuals) per standard 15 minute trawl (CPUE) from the historical core area (36.5-38.2N) of the RREAS during late spring (May to mid-June).

Data are log(CPUE+1) transformed, with geometric means calculated on non-zero data.

Note

Sampling effort was greatly reduced in time and space during 2020 due to COVID restrictions, and associated data reflected substantial bias for many taxa. Catches were standardized by using a Bayesian delta-GLM to estimate year effects while accounting for spatial and temporal covariates, and to estimate approximate 95% confidence limits; see Santora et al. 2021 (<a href="doi.org/10.1038/s41467-021-26484-5" target="_blank">doi.org/10.1038/s41467-021-26484-5</a>) for model approaches used to develop alternative indices in 2020.Dr.

John Field (NOAA; john.field@noaa.gov) and Tanya Rogers (NOAA; tanya.rogers@noaa.gov) from the SWFSC Rockfish Recruitment and Ecosystem Assessment Survey (RREAS; <a href="storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5" target="_blank">storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5</a>).; Additional Calculations: Samples represent catch (individuals) per standard 15 minute trawl (CPUE) from the historical core area (36.5-38.2N) of the RREAS during late spring (May to mid-June).

Data are log(CPUE+1) transformed, with geometric means calculated on non-zero data.

Note

Sampling effort was greatly reduced in time and space during 2020 due to COVID restrictions, and associated data reflected substantial bias for many taxa. Catches were standardized by using a Bayesian delta-GLM to estimate year effects while accounting for spatial and temporal covariates, and to estimate approximate 95% confidence limits; see Santora et al. 2021 (<a href="doi.org/10.1038/s41467-021-26484-5" target="_blank">doi.org/10.1038/s41467-021-26484-5</a>) for model approaches used to develop alternative indices in 2020.Dr.

John Field (NOAA; john.field@noaa.gov) and Tanya Rogers (NOAA; tanya.rogers@noaa.gov) from the SWFSC Rockfish Recruitment and Ecosystem Assessment Survey (RREAS; <a href="storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5" target="_blank">storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5</a>).; Additional Calculations: Samples represent catch (individuals) per standard 15 minute trawl (CPUE) from the historical core area (36.5-38.2N) of the RREAS during late spring (May to mid-June).

Data are log(CPUE+1) transformed, with geometric means calculated on non-zero data.

Note

Sampling effort was greatly reduced in time and space during 2020 due to COVID restrictions, and associated data reflected substantial bias for many taxa. Catches were standardized by using a Bayesian delta-GLM to estimate year effects while accounting for spatial and temporal covariates, and to estimate approximate 95% confidence limits; see Santora et al. 2021 (<a href="doi.org/10.1038/s41467-021-26484-5" target="_blank">doi.org/10.1038/s41467-021-26484-5</a>) for model approaches used to develop alternative indices in 2020.Dr.

John Field (NOAA; john.field@noaa.gov) and Tanya Rogers (NOAA; tanya.rogers@noaa.gov) from the SWFSC Rockfish Recruitment and Ecosystem Assessment Survey (RREAS; <a href="storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5" target="_blank">storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5</a>).; Additional Calculations: Samples represent catch (individuals) per standard 15 minute trawl (CPUE) from the historical core area (36.5-38.2N) of the RREAS during late spring (May to mid-June).

Data are log(CPUE+1) transformed, with geometric means calculated on non-zero data.

Note

Sampling effort was greatly reduced in time and space during 2020 due to COVID restrictions, and associated data reflected substantial bias for many taxa. Catches were standardized by using a Bayesian delta-GLM to estimate year effects while accounting for spatial and temporal covariates, and to estimate approximate 95% confidence limits; see Santora et al. 2021 (<a href="doi.org/10.1038/s41467-021-26484-5" target="_blank">doi.org/10.1038/s41467-021-26484-5</a>) for model approaches used to develop alternative indices in 2020.Dr.

John Field (NOAA; john.field@noaa.gov) and Tanya Rogers (NOAA; tanya.rogers@noaa.gov) from the SWFSC Rockfish Recruitment and Ecosystem Assessment Survey (RREAS; <a href="storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5" target="_blank">storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5</a>).; Additional Calculations: Samples represent catch (individuals) per standard 15 minute trawl (CPUE) from the historical core area (36.5-38.2N) of the RREAS during late spring (May to mid-June).

Data are log(CPUE+1) transformed, with geometric means calculated on non-zero data.

Note

Sampling effort was greatly reduced in time and space during 2020 due to COVID restrictions, and associated data reflected substantial bias for many taxa. Catches were standardized by using a Bayesian delta-GLM to estimate year effects while accounting for spatial and temporal covariates, and to estimate approximate 95% confidence limits; see Santora et al. 2021 (<a href="doi.org/10.1038/s41467-021-26484-5" target="_blank">doi.org/10.1038/s41467-021-26484-5</a>) for model approaches used to develop alternative indices in 2020.Dr.

John Field (NOAA; john.field@noaa.gov) and Tanya Rogers (NOAA; tanya.rogers@noaa.gov) from the SWFSC Rockfish Recruitment and Ecosystem Assessment Survey (RREAS; <a href="storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5" target="_blank">storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5</a>).; Additional Calculations: Samples represent catch (individuals) per standard 15 minute trawl (CPUE) from the historical core area (36.5-38.2N) of the RREAS during late spring (May to mid-June).

Data are log(CPUE+1) transformed, with geometric means calculated on non-zero data.

Note

Sampling effort was greatly reduced in time and space during 2020 due to COVID restrictions, and associated data reflected substantial bias for many taxa. Catches were standardized by using a Bayesian delta-GLM to estimate year effects while accounting for spatial and temporal covariates, and to estimate approximate 95% confidence limits; see Santora et al. 2021 (<a href="doi.org/10.1038/s41467-021-26484-5" target="_blank">doi.org/10.1038/s41467-021-26484-5</a>) for model approaches used to develop alternative indices in 2020.Dr.

John Field (NOAA; john.field@noaa.gov) and Tanya Rogers (NOAA; tanya.rogers@noaa.gov) from the SWFSC Rockfish Recruitment and Ecosystem Assessment Survey (RREAS; <a href="storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5" target="_blank">storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5</a>).; Additional Calculations: Samples represent catch (individuals) per standard 15 minute trawl (CPUE) from the historical core area (36.5-38.2N) of the RREAS during late spring (May to mid-June).

Data are log(CPUE+1) transformed, with geometric means calculated on non-zero data.

Note

Sampling effort was greatly reduced in time and space during 2020 due to COVID restrictions, and associated data reflected substantial bias for many taxa. Catches were standardized by using a Bayesian delta-GLM to estimate year effects while accounting for spatial and temporal covariates, and to estimate approximate 95% confidence limits; see Santora et al. 2021 (<a href="doi.org/10.1038/s41467-021-26484-5" target="_blank">doi.org/10.1038/s41467-021-26484-5</a>) for model approaches used to develop alternative indices in 2020.Dr.

John Field (NOAA; john.field@noaa.gov) and Tanya Rogers (NOAA; tanya.rogers@noaa.gov) from the SWFSC Rockfish Recruitment and Ecosystem Assessment Survey (RREAS; <a href="storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5" target="_blank">storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5</a>).; Additional Calculations: Samples represent catch (individuals) per standard 15 minute trawl (CPUE) from the historical core area (36.5-38.2N) of the RREAS during late spring (May to mid-June).

Data are log(CPUE+1) transformed, with geometric means calculated on non-zero data.

Note

Sampling effort was greatly reduced in time and space during 2020 due to COVID restrictions, and associated data reflected substantial bias for many taxa. Catches were standardized by using a Bayesian delta-GLM to estimate year effects while accounting for spatial and temporal covariates, and to estimate approximate 95% confidence limits; see Santora et al. 2021 (<a href="doi.org/10.1038/s41467-021-26484-5" target="_blank">doi.org/10.1038/s41467-021-26484-5</a>) for model approaches used to develop alternative indices in 2020.Dr.

John Field (NOAA; john.field@noaa.gov) and Tanya Rogers (NOAA; tanya.rogers@noaa.gov) from the SWFSC Rockfish Recruitment and Ecosystem Assessment Survey (RREAS; <a href="storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5" target="_blank">storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5</a>).; Additional Calculations: Samples represent catch (individuals) per standard 15 minute trawl (CPUE) from the historical core area (36.5-38.2N) of the RREAS during late spring (May to mid-June).

Data are log(CPUE+1) transformed, with geometric means calculated on non-zero data.

Note

Sampling effort was greatly reduced in time and space during 2020 due to COVID restrictions, and associated data reflected substantial bias for many taxa. Catches were standardized by using a Bayesian delta-GLM to estimate year effects while accounting for spatial and temporal covariates, and to estimate approximate 95% confidence limits; see Santora et al. 2021 (<a href="doi.org/10.1038/s41467-021-26484-5" target="_blank">doi.org/10.1038/s41467-021-26484-5</a>) for model approaches used to develop alternative indices in 2020.Dr.

John Field (NOAA; john.field@noaa.gov) and Tanya Rogers (NOAA; tanya.rogers@noaa.gov) from the SWFSC Rockfish Recruitment and Ecosystem Assessment Survey (RREAS; <a href="storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5" target="_blank">storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5</a>).; Additional Calculations: Samples represent catch (individuals) per standard 15 minute trawl (CPUE) from the historical core area (36.5-38.2N) of the RREAS during late spring (May to mid-June).

Data are log(CPUE+1) transformed, with geometric means calculated on non-zero data.

Note

Sampling effort was greatly reduced in time and space during 2020 due to COVID restrictions, and associated data reflected substantial bias for many taxa. Catches were standardized by using a Bayesian delta-GLM to estimate year effects while accounting for spatial and temporal covariates, and to estimate approximate 95% confidence limits; see Santora et al. 2021 (<a href="doi.org/10.1038/s41467-021-26484-5" target="_blank">doi.org/10.1038/s41467-021-26484-5</a>) for model approaches used to develop alternative indices in 2020.Dr.

John Field (NOAA; john.field@noaa.gov) and Tanya Rogers (NOAA; tanya.rogers@noaa.gov) from the SWFSC Rockfish Recruitment and Ecosystem Assessment Survey (RREAS; <a href="storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5" target="_blank">storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5</a>).; Additional Calculations: Samples represent catch (individuals) per standard 15 minute trawl (CPUE) from the historical core area (36.5-38.2N) of the RREAS during late spring (May to mid-June).

Data are log(CPUE+1) transformed, with geometric means calculated on non-zero data.

Note

Sampling effort was greatly reduced in time and space during 2020 due to COVID restrictions, and associated data reflected substantial bias for many taxa. Catches were standardized by using a Bayesian delta-GLM to estimate year effects while accounting for spatial and temporal covariates, and to estimate approximate 95% confidence limits; see Santora et al. 2021 (<a href="doi.org/10.1038/s41467-021-26484-5" target="_blank">doi.org/10.1038/s41467-021-26484-5</a>) for model approaches used to develop alternative indices in 2020.Dr.

John Field (NOAA; john.field@noaa.gov) and Tanya Rogers (NOAA; tanya.rogers@noaa.gov) from the SWFSC Rockfish Recruitment and Ecosystem Assessment Survey (RREAS; <a href="storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5" target="_blank">storymaps.arcgis.com/collections/af0fa37db2bf4f1cadb024ec0ffbdfb5</a>).; Additional Calculations: Samples represent catch (individuals) per standard 15 minute trawl (CPUE) from the historical core area (36.5-38.2N) of the RREAS during late spring (May to mid-June).

Data are log(CPUE+1) transformed, with geometric means calculated on non-zero data.

Note

Sampling effort was greatly reduced in time and space during 2020 due to COVID restrictions, and associated data reflected substantial bias for many taxa. Catches were standardized by using a Bayesian delta-GLM to estimate year effects while accounting for spatial and temporal covariates, and to estimate approximate 95% confidence limits; see Santora et al. 2021 (<a href="doi.org/10.1038/s41467-021-26484-5" target="_blank">doi.org/10.1038/s41467-021-26484-5</a>) for model approaches used to develop alternative indices in 2020.