Why is haddock overtaking cod? Comparing the effects of temperature and habitat size on both species recruitment dynamics across the N Atlantic ...

• Main Authors: Mantzouni, Irene, MacKenzie, Brian R.
• Format: Conference Object
• Language: unknown
• Published: ASC 2009 - Theme session C 2024
• Subjects: Ecosystem observation, processes and dynamics; Pressures, impacts, conservation, and management; Gadus morhua
• Online Access: https://dx.doi.org/10.17895/ices.pub.25070411; https://ices-library.figshare.com/articles/conference_contribution/Why_is_haddock_overtaking_cod_Comparing_the_effects_of_temperature_and_habitat_size_on_both_species_recruitment_dynamics_across_the_N_Atlantic/25070411

No abstracts are to be cited without prior reference to the author.Demersal fish stocks in the N Atlantic have experienced serious declines and depletions due to overfishing during the last decades. For some species, such as haddock (Melanogrammus aeglefinus), the situation seems to change and certain stocks are starting to recover. Other species, like cod (Gadus morhua), however, still remain at low levels despite restrictive management measures or even fishing closures. The main aim of our study is to investigate whether the differing responses of these species are related to differing sensitivities of their recruitment dynamics to environmental forcing, and especially temperature. Thus, we developed stock-recruit (SR) models, in a hierarchical framework, combining data across their sympatric populations. By allowing the SR parameters to depend on temperature and habitat 2 size, it is possible to (i) determine the patterns of productivity and carrying capacity in relation to the these factors among and ...