Oceanographic characteristics of the habitat of benthic fish and invertebrates in the Beaufort Sea
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1 AFSC Oceanographic characteristics of the habitat of benthic fish and invertebrates in the Beaufort Sea Elizabeth Logerwell, Kimberly Rand Alaska Fisheries Science Center, National Marine Fisheries Service Thomas J. Weingartner School of Fisheries and Ocean Sciences, University of Alaska Fairbanks Lowell Wakefield Symposium March 27, 2013
2 Beaufort Sea surveys Frost and Lowry; opportunistic sampling on CGC Glacier 1990 Thorsteinson et al; nearshore sampling; further offshore than previous surveys No quantitative survey before 2008 U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 2
3 Objectives Baseline for oil/gas development and climate change Methods for future monitoring surveys Species, distribution, abundance, and biological characteristics of fish and invertebrates Oceanography BOEMRE OCS Report U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 3
4 Approach Distribution and abundance of benthic fish and invertebrates Compare to ocean temperature and salinity Oceanographic characteristics of habitat Potential impacts of climate change Logerwell, E.A., K.M. Rand and T.J. Weingartner Oceanographic characteristics of the habitat of benthic fish and invertebrates in the Beaufort Sea. Polar Biology 34 (11): U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 4
5 Survey methods 6-22 August 2008 Charter vessel F/V Ocean Explorer Bottom trawl (1.5 mesh liner) Net height, spread, bottom contact CTDs U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 5
6 Survey area U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 6
7 Bottom trawl catch (by weight) Walleye pollock Sculpin Other Sea Sea urchin cucumber Mud star Mussel Eelpout Snow crab Bri8le star Arc$c cod Other U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 7
8 Arctic cod U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 8
9 Eelpouts U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 9
10 Pollock U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 10
11 Sculpin U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 11
12 Snow crab Density Individual weight U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 12
13 U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 13
14 Arctic cod Transects 1 and 2 U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 14
15 Arctic cod Transects 3 and 5 U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries
16 Eelpout Transects 1 and 2 U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 16
17 Eelpout Transects 3 and 5 U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 17
18 Pollock Transects 1 and 2 U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 18
19 Pollock Transects 3 and 5 U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 19
20 Sculpin Transects 1 and 2 U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 20
21 Sculpin Transects 3 and 5 U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 21
22 Snow crab Transects 1 and 2 U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 22
23 Snow crab Transects 3 and 5 U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 23
24 Conclusions Arctic cod, eelpouts, pollock and snow crab were abundant off the shelf associated with cold, high salinity water derived from the Chukchi Sea through Barrow canyon Sculpins were abundant on the shelf What will be the impacts of climate change on oceanographic processes such as transport of Chukchi Sea water through Barrow canyon? Rand, K., Logerwell E., Ahgeak, E., Parker-Stetter, S., Hibpshman, R., Whitehouse, A Arctic cod diets from the western Beaufort Sea, August, Polar Biology /s y U.S. Department of Commerce National Oceanic and Atmospheric Administration NOAA Fisheries Page 24
25 Thanks To the science and vessel team and RACE Groundfish Assessment
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