Otoliths of eleven fish species have been identified in cores recovered from the trough Malangsdjupet (close to 70°N) on the Norwegian continental shelf. The codfish family (Gadidae) dominates with eight species. Three acmc-zones bclonging to the Merlangius merlangus Lineage-Zone are establishcd: the
Boreogadus sp. Acme-Zone (about 15,000 or 14,000 to 10,000 years B. P.), the Neocolliolus esmarki Acme-Zone (10,000 to 7,800 years B. P.) and the Micromesistius poutassou Acme-Zone (7,800 B. P. to present). The Boreogadus sp. Acme-Zone reflects an arctic environment while the two others reflect
boreal conditions. The M. poutassou Acme-Zone represents a more oceanic environment than the carly Holocene N. esmarki Acme-Zone.