Letter: Taking stock of cod stock assessments

In a Telegram letter published May 6, (“Perfectly good fisheries data being ignored,” click here ) Harvey Jarvis criticized the Department of Fisheries and Oceans’ assessments of northern cod and 3Ps (i.e. south coast) cod. Based on my 20-plus years of experience with stock assessments in Newfoundland and Labrador and other regions (Canada, the U.S., and Europe), I think Jarvis is absolutely correct about the 3Ps cod assessment, but he is incorrect about the new northern cod assessment framework that DFO adopted in 2016. Jarvis suggested that the only information used in the northern cod assessment model to estimate stock biomass is the DFO research vessel survey index. He indicated that the commercial catch, the commercial logbook data and the cod sentinel catch rate indices are not used. This is not true. The 2016 northern cod stock assessment used a state-of-the-art model,,, click here to read the letter 17:23