Biometry, isotopic composition and diet of Arctic charr (Salvelinus alpinus) from Lake Aigneau, Northern Quebec ...

• Main Authors: Power, Michael, Power, Geoff, Reist, James D, Bajno, Robert
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2009
• Subjects: Sampling lake; International Polar Year 2007-2008 IPY; Arctic charr; International Polar Year; IPY; Salvelinus alpinus
• Online Access: https://dx.doi.org/10.1594/pangaea.818405; https://doi.pangaea.de/10.1594/PANGAEA.818405

Two modal size groups of sexually mature Arctic charr (Salvelinus alpinus) differing in shape and found at different depths in Lake Aigneau in the Canadian sub-Arctic are described and tested for genetic and ecological differentiation. Forms consisted of a small littoral resident, mean size 21.7 cm, and a large profundal resident, mean size 53.9 cm. Mitochondrial DNA analysis indicated that seven of eight haplotypes were diagnostic for either the littoral or profundal fish, with 66.6% of the variation being found within form groupings. Pairwise tests of microsatellite data indicated significant differences in nine of 12 loci and a significant difference between the forms across all tested loci. Molecular variation was partitioned to 84.1% within and 15.9% between forms and suggestive of either restricted interbreeding over time or different allopatric origins. Stable isotope signatures were also significantly different, with the profundal fish having higher d13C and d15N values than the littoral fish. ... : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...