Unexpected fish and squid in the central Arctic deep scattering layer


Contact
Hauke.Flores [ at ] awi.de

Abstract

The retreating ice cover of the Central Arctic Ocean (CAO) fuels speculations on future fisheries. However, very little is known about the existence of harvestable fish stocks in this 3.3 million–square kilometer ecosystem around the North Pole. Crossing the Eurasian Basin, we documented an uninterrupted 3170-kilometer-long deep scattering layer (DSL) with zooplankton and small fish in the Atlantic water layer at 100- to 500-meter depth. Diel vertical migration of this central Arctic DSL was lacking most of the year when daily light variation was absent. Unexpectedly, the DSL also contained low abundances of Atlantic cod, along with lanternfish, armhook squid, and Arctic endemic ice cod. The Atlantic cod originated from Norwegian spawning grounds and had lived in Arctic water temperature for up to 6 years. The potential fish abundance was far below commercially sustainable levels and is expected to remain so because of the low productivity of the CAO.



Item Type
Article
Authors
Divisions
Primary Division
Programs
Primary Topic
Helmholtz Cross Cutting Activity (2021-2027)
N/A
Peer revision
Peer-reviewed
Publication Status
Published
Eprint ID
56113
DOI 10.1126/sciadv.abj7536

Cite as
Snoeijs-Leijonmalm, P. , Flores, H. , Sakinan, S. , Hildebrandt, N. , Svenson, A. , Castellani, G. , Vane, K. , Mark, F. C. , Heuzé, C. , Tippenhauer, S. , Niehoff, B. , Hjelm, J. , Sundberg, J. H. , Schaafsma, F. and Engelmann, R. , EFICA-MOSAiC Team (2022): Unexpected fish and squid in the central Arctic deep scattering layer , Science Advances, 8 (7) . doi: 10.1126/sciadv.abj7536


Download
[thumbnail of Snoeils-Leiijonmalm_ArcticFish_sciadv_abj7536.pdf]
Preview
PDF
Snoeils-Leiijonmalm_ArcticFish_sciadv_abj7536.pdf

Download (6MB) | Preview

Share


Citation

Research Platforms

Campaigns
PS > 122/1 (MOSAiC20192020)
PS > 122/2 (MOSAiC20192020)
PS > 122/3 (MOSAiC20192020)

Funded by
EFICA (contract research)


Actions
Edit Item Edit Item