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Merge pull request #149 from pfmc-assessments/EJDick-NOAA-patch-1
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iantaylor-NOAA authored Feb 6, 2025
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Note: this package was named `PacFIN.Utilities` prior to January 2025.

## Data
Data collection programs for groundfish managed within the Pacific Fisheries Management Council (PFMC) are the responsibility of individual states. Washington and Oregon have mandatory sampling protocols, while sampling in California is not mandatory. These programs have largely been in existence since the 1960s. PacFIN, which was initiated in 1981, serves as a central repository for these data. For fish landed whole, fork or total length and sex are typically recorded at a minimum. Otoliths are sometimes extracted and weights are sometimes taken. For fish landed dressed, dorsal length is taken rather than fork length (or total length).
Data collection programs for groundfish managed within the Pacific Fisheries Management Council (PFMC) are the responsibility of individual states. Washington and Oregon have mandatory sampling protocols, while sampling in California was not mandatory prior to October 10, 2021. These programs have largely been in existence since the 1960s. PacFIN, which was initiated in 1981, serves as a central repository for these data. For fish landed whole, fork or total length and sex are typically recorded at a minimum. Otoliths are sometimes extracted and weights are sometimes taken. For fish landed dressed, dorsal length is taken rather than fork length (or total length).
Samples can be taken from unsorted landings (i.e., 'ocean run') or from sorted categories (e.g., small, medium, large, ...). When fish are sorted into categories, samples are in theory taken from each sorted group and the actual weight of the sorted group is recorded. Data within PacFIN contains a range of fields that provides information on each specific record: [area of landing](https://pacfin.psmfc.org/pacfin_pub/data_rpts_pub/code_lists/ar.txt), [gear type](https://pacfin.psmfc.org/pacfin_pub/data_rpts_pub/code_lists/gr.txt), [port](https://pacfin.psmfc.org/pacfin_pub/data_rpts_pub/code_lists/pc.txt), [the condition landed (e.g., live, dead, dressed)](https://pacfin.psmfc.org/pacfin_pub/data_rpts_pub/code_lists/list_cl_condition.txt), and [the removal type (e.g., commercial, research)](https://pacfin.psmfc.org/pacfin_pub/data_rpts_pub/code_lists/list_cl_removal_type.txt). All records within PacFIN are associated with a unique species code [SPID](https://pacfin.psmfc.org/pacfin_pub/data_rpts_pub/code_lists/sp.txt).

## Filtering
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