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Receding sea ice changes the lightscape of high\u2010latitude oceans and more light will penetrate into the sea. This affects bottom\u2010up control through primary productivity and top\u2010down control through vision\u2010based foraging. We model effects of sea\u2010ice shading on visual search to develop a mechanistic understanding of how climate\u2010driven sea\u2010ice retreat affects predator\u2013prey interactions. We adapt a prey encounter model for ice\u2010covered waters, where prey\u2010detection performance of planktivorous fish depends on the light cycle. We use hindcast sea\u2010ice concentrations (past 35\u00a0years) and compare with a future no\u2010ice scenario to project visual range along two south\u2013north transects with different sea\u2010ice distributions and seasonality, one through the Bering Sea and one through the Barents Sea. The transect approach captures the transition from sub\u2010Arctic to Arctic ecosystems and allows for comparison of latitudinal differences between longitudes. We find that past sea\u2010ice retreat has increased visual search at a rate of 2.7% to 4.2% per decade from the long\u2010term mean; and for high latitudes, we predict a 16\u2010fold increase in clearance rate. Top\u2010down control is therefore predicted to intensify. Ecological and evolutionary consequences for polar marine communities and energy flows would follow, possibly also as tipping points and regime shifts. We expect species distributions to track the receding ice\u2010edge, and in particular expect species with large migratory capacity to make foraging forays into high\u2010latitude oceans. However, the extreme seasonality in photoperiod of high\u2010latitude oceans may counteract such shifts and rather act as a zoogeographical filter limiting poleward range expansion. The provided mechanistic insights are relevant for pelagic ecosystems globally, including lakes where shifted distributions are seldom possible but where predator\u2013prey consequences would be much related. As part of the discussion on photoperiodic implications for high\u2010latitude range shifts, we provide a short review of studies linking physical drivers to latitudinal extent.<\/jats:p>","DOI":"10.1111\/gcb.13797","type":"journal-article","created":{"date-parts":[[2017,6,28]],"date-time":"2017-06-28T09:12:38Z","timestamp":1498641158000},"page":"5318-5330","source":"Crossref","is-referenced-by-count":72,"title":["Sea\u2010ice loss boosts visual search: fish foraging and changing pelagic interactions in polar oceans"],"prefix":"10.1111","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1208-4793","authenticated-orcid":false,"given":"Tom J.","family":"Langbehn","sequence":"first","affiliation":[{"name":"Department of Biology University of Bergen Bergen Norway"},{"name":"University Centre in Svalbard Longyearbyen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5895-6983","authenticated-orcid":false,"given":"\u00d8ystein","family":"Varpe","sequence":"additional","affiliation":[{"name":"University Centre in Svalbard Longyearbyen Norway"},{"name":"Akvaplan\u2010niva Fram Centre Troms\u00f8 Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2017,7,31]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/0304-3800(93)90007-F"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.4319\/lo.2004.49.1.0233"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1080\/00364827.1997.10413647"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.pocean.2011.11.015"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1029\/2008GL035028"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.1038\/nclimate2848"},{"key":"e_1_2_6_8_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1529-8817.2003.00790.x"},{"key":"e_1_2_6_9_1","doi-asserted-by":"publisher","DOI":"10.1098\/rstb.2013.0272"},{"key":"e_1_2_6_10_1","doi-asserted-by":"publisher","DOI":"10.14430\/arctic4455"},{"key":"e_1_2_6_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.pocean.2015.08.005"},{"key":"e_1_2_6_12_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.1068574"},{"key":"e_1_2_6_13_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.150.3692.28"},{"key":"e_1_2_6_14_1","volume-title":"Sea Ice Concentrations from Nimbus\u20107 SMMR and DMSP SSM\/I\u2010SSMIS Passive Microwave Data, Version 1 [daily, Arctic Ocean, 1978\u20102015]","author":"Cavalieri D. 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