title: Essential and non-essential element concentrations in two sleeper shark species collected in arctic waters.
abstract: A number of elements/metals have increased in arctic biota and are of concern due to their potential toxicity. Most studies on elements in the Arctic have focused on marine mammals and seabirds, but concentrations in the Greenland shark (Somniosus microcephalus) and Pacific sleeper shark (Somniosus pacificus), the only two shark species known to regularly inhabit arctic waters, have never been reported. To address this data gap, concentrations and patterns of 25 elements were analyzed in liver of Greenland sharks collected about Cumberland Sound (n=24) and Pacific sleeper sharks collected about Prince William Sound (n=14). Several non-essential elements differed between species/locations, which could suggest geographical exposure differences or ecological (e.g., diet) differences between the species. Certain essential elements also differed between the two sleeper sharks, which may indicate different physiological requirements between these closely related shark species, although information on such relationships are lacking for sharks and fish.
authors.affiliation: Great Lakes Institute for Environmental Research, University of Windsor, Windsor, ON, Canada.
authors.forename: Bailey C
authors.initials: BC
authors.lastname: McMeans
authors.forename: Katrine
authors.initials: K
authors.lastname: Borgå
authors.forename: William R
authors.initials: WR
authors.lastname: Bechtol
authors.forename: David
authors.initials: D
authors.lastname: Higginbotham
authors.forename: Aaron T
authors.initials: AT
authors.lastname: Fisk
mesh_terms: D000818:Animals; D001110:Arctic Regions; D001151:Arsenic / Q000032:analysis; D004781:Environmental Exposure; D004784:Environmental Monitoring / Q000379:methods*; D005260:Female; D020387:Food Chain; D008297:Male; D008628:Mercury / Q000032:analysis; D008670:Metals / Q000032:analysis*; D009792:Oceans and Seas; D012643:Selenium / Q000032:analysis; D012754:Sharks / Q000378:metabolism*; D013045:Species Specificity; D014874:Water Pollutants, Chemical / Q000032:analysis*; D015032:Zinc / Q000032:analysis
chemical_list: D008670:Metals; D014874:Water Pollutants, Chemical; D008628:Mercury; D012643:Selenium; D015032:Zinc; D001151:Arsenic