(Table 1) Age, fork length, tissue d15N and δ¹³C and mercury content of arctic char (Salvelinus alpinus) across the Canadian Arctic ...

• Main Authors: Gantner, Nikolaus, Muir, Derek C G, Power, Michael, Iqaluk, Deborah, Reist, James D, Babaluk, John A, Meili, Markus, Borg, Hans, Hammar, Johan, Michaud, Wendy K, Dempson, Brian, Solomon, Keith R
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: Event label; Latitude of event; Longitude of event; Area/locality; Lake; Time coverage; Salvelinus alpinus; Salvelinus alpinus, fork length; Salvelinus alpinus, standard deviation; Salvelinus alpinus, mass; Salvelinus alpinus, age; Salvelinus alpinus, δ15N, tissue; Salvelinus alpinus, δ13C, tissue; Mercury; Mercury, standard deviation; Biological sample; Otolith analysis; Continuous Flow Isotope Ratio Mass Spectrometry CF/IRMS; Direct Mercury Analyser DMA Milestone Instruments; International Polar Year 2007-2008 IPY; Cornwallis Island; International Polar Year; IPY
• Online Access: https://dx.doi.org/10.1594/pangaea.810106; https://doi.pangaea.de/10.1594/PANGAEA.810106

Among-lake variation in mercury (Hg) concentrations in landlocked Arctic char was examined in 27 char populations from remote lakes across the Canadian Arctic. A total of 520 landlocked Arctic char were collected from 27 lakes, as well as sediments and surface water from a subset of lakes in 1999, 2002, and 2005 to 2007. Size, length, age, and trophic position (d15N) of individual char were determined and relationships with total Hg (THg) concentrations investigated, to identify a common covariate for adjustment using analysis of covariance (ANCOVA). A subset of 216 char from 24 populations was used for spatial comparison, after length-adjustment. The influence of trophic position and food web length and abiotic characteristics such as location, geomorphology, lake area, catchment area, catchment-to-lake area ratio of the lakes on adjusted THg concentrations in char muscle tissue were then evaluated. Arctic char from Amituk Lake (Cornwallis Island) had the highest Hg concentrations (1.31 µg/g wet wt), while ... : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...