Játtað í:
2009

Granskingarøki:
Náttúra og náttúrutilfeingi

Verkætlanarslag:
R&D

Verkætlanarheiti:
Climatic control of blue whiting and mackerel at the Faroese Crossroads

Játtanarnummar:
0417

Verkætlanarleiðari:
Hjálmar Hátún

Stovnur/virki:
Havstovan

Verkætlanarskeið:
1.1.2010 -31.12. 2011

Stuðul úr Granskingargrunninum:
723.140 kr.

Verkætlanarlýsing:
Original:
The project focuses on how the marine climate (currents, temperatures etc.) regulates the abundance of food (phytoplankton) in the waters where economically important pelagic fish stocks like blue whiting and mackerel spawn, migrate and feed. The importance of the subpolar gyre (SPG) for individual components of the bio-physical system in the northeast Atlantic has, in coarse terms, already been demonstrated for the last half century. These components will be updated and further refined for the waters surrounding the Faroe Islands. This will be achieved by utilizing the available satellite data in combination with the large NISE hydrographical database, output from the state-of-the-art NISE numerical ocean general circulation model and novel data from Autonomous Underwater Vehicles (Seagliders). Emphasis will be put on the last decade with good satellite data coverage. The deliverables from this project could be used as a scientific basis for i) a more rational fishery management and ii) obtaining more fair/realistic international fishery agreements.

Final:
We have identified the most recent major changes in the marine climate around the Faroe Islands, and we have identified the most important drivers underlying these changes. By gaining access to high-resolution satellita data on Ocean Color and by collaborating with advanced users of such data, we have identified links between the major oceanographic changes, and changes in the phytoplankton abundance and in the primary production – the basis under all food webs. We have also found links between the autumn/winter migration of mackerel and ocean temperatures, and we have identified a potential to forecast the recruitment to the blue whiting stock. Our results are just the first steps in a highly complicated science, but with refinement, these might be used in operational mode. This project has been a stepping stone to other larger projects, where the complicated climate-ecosystem questions will be further explored.

Støða:
Liðug

Avrik:
Publications:
Homrum, E. Í, Hansen, B., Jónsson, S., Michalsen, K., Righton, D., Steingrund, P., Jakobsen, T., Mouritsen, R., Hátún, H., Armannsson, H., and Joensen, J.S., 2012. Migration of saithe (Pollachius virens) in the Northeast Atlantic, Submitted to ICES Journal of marine science.

Jansen, T. and H. Hátún. Enviroregulation of mackerel (Scomber scombrus) overwintering and prespawning Migration. Submitted.

Larsen, K.M., Hátún, H., Hansen, B. And Kristiansen, R, 2012. Atlantic water in the Faroe area: sources and variability. doi: 10.1093/icesjms/fss028.

Homrum, E. Í., Hansen, B., Steingrund, P., Hátún, H., 2011. Title: Growth, maturation, diet and distribution of saithe (Pollachius virens) in Faroese waters (NE Atlantic). Marine Biology Research, 8:3, 246-254.

Zhai, L., Gudmundsson, K., Miller, P., Peng W., Gudfinnsson, H., Debes, H., Hátún, H., White, G., Walls, R.H.,Sathyendranath, S. and Platt, T., 2011. Phytoplankton phenology and production around Iceland and Faroes, Continental Shelf Research, In Press. V.M. Trenkel, G. Huse, B. MacKenzie, P. Alvarez, H. Arrizabalaga, M. Castonguay, N. Goñi, F. Grégoire, H. Hátún, T. Jansen, J. A. Jacobsen, P. Lehodey, M. Lutcavage , P. Mariani, G. Melvin, J. D. Neilson, L. Nøttestad, G.J. Óskarsson, M. Payne, D. Richardson, I. Senina, D.C. Speirs, 2011. Comparative ecology of widely-distributed pelagic fish species in the North Atlantic: implications for modelling climate and fisheries impacts. Submitted to Progress in Oceanography.

Payne, M., Egan, A., Sascha, M., Fassler, M., Hátún, H., Holts, J. C., Jacobsen, J. A., Slotte, A., Loeng, H., 2011. The rise and fall of the NE Atlantic blue whiting . Marine Biology Research, In Press.

Hansen, B., Hátún, H., Kristiansen, R., Olsen, S. M., Østerhus, S., 2010. Stability and forcing of the Iceland-Faroe inflow of water, heat, and salt to the Arctic. Ocean Science, 6, doi:10.5194/os-6-1013-2010.

Hátún, H. and Gaard, E. 2010. Marine climate, squid and pilot whales in the northeastern Atlantic. in Dorete - her book, Annales Societatis Scientarium Færoensis Suplementum 52: 50-68. Faroe University Press, Tórshavn, 307 pp.

Steingrund, P., R. Mouritsen, J. Reinert, E. Gaard, and H. Hátún, 2010. Total stock size and cannibalism regulate recruitment in cod (Gadus morhua) on the Faroe Plateau. ICES Journal of Marine Science, 67, 111-124.

Selected presentations 2011:
19.-21. januar: Nordic Climate Fish Conference, Solstrand, Noreg. Egin framløga: Oceanic regulation of the Iceland-Scotland shelf ecosystems.

29. mars-1. apríl: THOR (FP7-verkætlan) fundur í Oban, Skotland. Egin framløga: Predictability of the NE Atlantic marine climate – on subdecadal time scales.

10.-12. mai: ICES/NAFO Decadal Symposium, Santander, Spania. Egin framløga: Sub-decadal oceanic oscillations and blue whiting recruitment.

8. november: Endafundur fyri verkætlanina SPACE (fíggjað av Nordisk Ministerråd). Eg havi umsitið hesa verkætlan og leiddi fundin.

Selected publications 2010:
Mars. Hátún et al., Climate Change-induced redistribution of NE Atlantic marine ecosystems. “Changing Seas” workshop í Keypmannahavn (skipað av Nordisk Ministerråd).

August. Hátún et al., Subpolar Gyre Variability and its Effect on Blue Whiting. ESSAS fundur í Friday Harbor, WA, USA.

September. Hátún et al.,Variation in hydrography, plankton productivity and fish distribution in the North East Atlantic, Pelagix Complex ráðstevna í Norðurlandahúsinum.

Oktober. Hátún et al., Large-scale shifts in the North Atlantic bio-geography forced by the subpolar gyre (invited). PICES ársfundur í Portland, USA.



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