2018 4X5Y Atlantic Cod Framework Data Inputs

Abstract

In 2018, the Maritimes Region of Fisheries and Oceans Canada will be undertaking a framework assessment of 4X5Y Atlantic Cod (Gadus morhua). Such assessments are intended to be a comprehensive review of the biology, stock structure, the fishery, abundance indices, current assessment methodology and approaches for determining acceptable harvest limits. This document explores a variety of data sources available for 4X5Y Cod, including tagging projects (1980s–2000s), commercial fishery information (1980–2017) and departmental research surveys (1983–2017). The results of stock structure analyses, spatial and temporal patterns in distribution, bycatch, biological attributes (length and weight at age, condition factor, growth and maturity) and updates to data inputs for stock assessment (fishery catch at age, survey indices of abundance, relative fishing mortality, total mortality) are also described here, as well as any persistent data gaps. Finally, a preliminary review of ecosystem indicators and accompanying data considered relevant to the 4X5Y Cod assessment is summarized.