Atlantic cod (Gadus morhua L.) off Greenland over the past two decades ...

• Main Authors: Rätz, Hans-Joachim, Lloret, Josep, Stransky, Christoph
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: ASC 2005 - AA - Theme session 2024
• Subjects: Fisheries and aquaculture; Ecosystem observation, processes and dynamics; atlantic cod; Gadus morhua; Greenland; Iceland
• Online Access: https://dx.doi.org/10.17895/ices.pub.25350082.v1; https://ices-library.figshare.com/articles/conference_contribution/Atlantic_cod_Gadus_morhua_L_off_Greenland_over_the_past_two_decades/25350082/1

No abstracts are to be cited without prior reference to the author.The present investigation deals with the ecological relationships between the observed variability in essential population parameters of the cod stock off Greenland including environmental conditions, i.e. the near bottom water temperature. The data were derived from an annual autumn survey series commenced in 1982. The survey estimates confirmed that the spawning stock biomass remained very low after the major stock collapse in the early 1970s. The estimated total stock abundance has undergone dramatic changes due to very high recruitment variability, fishing and emigration to Iceland. However, the year class 2003 is assessed as the second strongest year class since 1982 and is estimated to amount to 71 % of the strongest year class 1984 at age 1, which yielded about 170 000 t throughout its life. The variation of the mortality estimates indicates that the progressive depletion of the strong year classes 1984 and 1985 was mainly due to ...