FN Archimer Export Format PT J TI Feeding of Greenland halibut ( Reinhardtius hippoglossoides ) in the Canadian Beaufort Sea BT AF GIRALDO, Carolina STASKO, Ashley WALKUSZ, Wojciech MAJEWSKI, Andrew ROSENBERG, Bruno POWER, Michael SWANSON, Heidi REIST, James D. AS 1:1;2:2;3:3,4;4:3;5:3;6:2;7:2;8:3; FF 1:PDG-RBE-HMMN-LRHBL;2:;3:;4:;5:;6:;7:;8:; C1 IFREMER, Lab Ressources Halieut, 150 Quai Gambetta BP 699, F-62321 Boulogne Sur Mer, France. Univ Waterloo, 200 Univ Ave, Waterloo, ON, Canada. Fisheries & Oceans Canada, Freshwater Inst, 501 Univ Crescent, Winnipeg, MB R3T 2N6, Canada. Polish Acad Sci, Inst Oceanol, Powstancow Warszawy 55, PL-81712 Sopot, Poland. C2 IFREMER, FRANCE UNIV WATERLOO, CANADA MPO, CANADA POLISH ACAD SCI, POLAND SI BOULOGNE SE PDG-RBE-HMMN-LRHBL IN WOS Ifremer jusqu'en 2018 copubli-europe copubli-int-hors-europe IF 2.539 TC 16 UR https://archimer.ifremer.fr/doc/00435/54611/55992.pdf LA English DT Article DE ;Benthic-pelagic coupling;Trophic niche;Biomarkers;Arctic AB Trophic patterns for Greenland Halibut are reported for the first time in the Canadian Beaufort Sea and Amundsen Gulf (n = 269). Samples were collected from 2012 to 2014 on the upper (300–500 m) and lower continental slope (750–1500 m) and were analyzed for stomach contents, stable isotopes ratios and fatty acids (FA). Stomach contents indicated that Arctic Cod, Boreogadus saida, was the main prey ingested on the upper slope (50–94% of total biomass) whereas Gelatinous Snailfish (Liparis fabricii) and Zoarcids (Lycodes spp.) dominated diets on the lower slope (17–62% of total biomass). Stable isotope mixing models and FA analyses also identified benthopelagic fishes (i.e., Liparis spp., B. saida) as key prey and highlighted large dietary overlap among years and between the two depth categories. Greenland Halibut were characterized by relatively wide δ13C and narrow δ15N ranges that suggested use of both pelagic and benthic energy sources and a piscivorous diet. Calanus-type markers such as 20:1n9 dominated the FA (>20% of total FA) andemphasized the importance of pelagic-derived material in the diet. The contribution of pelagic and benthic-derived matter in the diet suggests that Greenland Halibut play a major role in the benthic-pelagic coupling for deep water communities (up to 1500 m) in the Canadian Beaufort Sea. PY 2018 PD JUN SO Journal Of Marine Systems SN 0924-7963 PU Elsevier Science Bv VL 183 UT 000431937100004 BP 32 EP 41 DI 10.1016/j.jmarsys.2018.03.009 ID 54611 ER EF