[Tech DOc Page Edit]: harbor porpoise bycatch for SOE 2026 #139
Description
Primary Contact
Choose a tech doc page to suggest edits
22 Harbor Porpoise Bycatch
Page Edit 1
change "Data Sources" to read:
Bycatch estimates and potential biological removal levels are reported in the publicly available Marine Mammal Stock Assessment reports. More descriptions on data sources, processing and analyses are found in Northeast Fisheries Science Center (NEFSC) Center Reference Documents (CRDs) and journal papers. The data to calculate the bycatch estimate comes from observer program databases and fishing effort databases.
Page Edit 2 (if applicable)
change the Data Processing section to read:
Annual and 5-year averaged bycatch estimates are documented in Center Reference Documents (CRD). The potential biological removal values are extracted from the Stock Assessment Reports.
Page Edit 3 (if applicable)
change the first paragraph in the "Data Analysis" section to read as below. Please leave the two equations that follow the paragraph exactly as they are.
Bycatch estimates and their associated coefficients of variation are documented in the CRDs, then reported in the Marine Mammal Stock Assessment Reports. Annual estimates from all fisheries as reported in the Marine Mammal Stock Assessment Reports are summed together and the CV of the sum is calculated using the delta method. The 95% confidence intervals are then calculated from the sums and associated CVs assuming a lognormal distribution.