Research Document - 2015/022
4X5Y Haddock 2014 Framework Assessment: Data Inputs and Exploratory Modelling
By H.H. Stone and S.C. Hansen
Abstract
In 2014/2015, the Maritimes Region of Fisheries and Oceans Canada will be undertaking a framework assessment of 4X5Y haddock (Melanogrammus aeglefinus). 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. The results of updated analyses on stock structure, spatial and temporal patterns in distribution, bycatch, biological attributes (length and weight at age, condition factor, growth and maturity) and revisions/updates to data inputs for stock assessment (fishery catch at age, survey indices of abundance, relative fishing mortality, total mortality) are described here. In addition, the ADAPT VPA software was used to evaluate the impacts of revisions and modifications to the 4X5Y haddock data inputs on estimates of age 1 recruits, age 4+ population biomass and ages 6-9 fishing mortality. This research document is intended to provide an update on several biological and fishery attributes for future framework evaluations.
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