2010
DOI: 10.1007/s10750-009-0043-z
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Latitudinal variation in growth among Arctic charr in eastern North America: evidence for countergradient variation?

Abstract: Biological data from 66 populations of Arctic charr, Salvelinus alpinus, from eastern North America were analysed to test the applicability of the countergradient hypothesis as an explanation of differences in seasonally adjusted growth rates. Samples were obtained along a 37°latitudinal gradient and partitioned among anadromous, normal lacustrine, and dwarf lacustrine Arctic charr morphotypes. Models relating length-at-age or age-specific growth rates to latitude were estimated for each morphotype. Lengthat-a… Show more

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Cited by 43 publications
(46 citation statements)
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“…As anticipated L F10 was negatively correlated with latitude (r = −0.34, F = 6.40, n = 52, p = 0.01) with growth rates decreasing to the north (Fig. 8); this also was observed by Chavarie et al (2010) for char but is a common feature of fish populations (Scott and Crossman, 1998). Amadjuak Lake anadromous char had low growth rates for their latitude (65°N); this lake discharges into Nettilling Lake and char migrating seaward have a long migration route which may reduce their net energy gain when compared to char inhabiting similar latitudes where the migration route is shorter.…”
Section: Factors Affecting Spatial Variation In Anadromous Char Hg Cosupporting
confidence: 77%
“…As anticipated L F10 was negatively correlated with latitude (r = −0.34, F = 6.40, n = 52, p = 0.01) with growth rates decreasing to the north (Fig. 8); this also was observed by Chavarie et al (2010) for char but is a common feature of fish populations (Scott and Crossman, 1998). Amadjuak Lake anadromous char had low growth rates for their latitude (65°N); this lake discharges into Nettilling Lake and char migrating seaward have a long migration route which may reduce their net energy gain when compared to char inhabiting similar latitudes where the migration route is shorter.…”
Section: Factors Affecting Spatial Variation In Anadromous Char Hg Cosupporting
confidence: 77%
“…For example, in the northern hemisphere, many organisms at northern latitudes have larger body sizes, increased longevity and delayed sexual maturation and these traits typically scale with declining latitude [100], [101]. These patterns are rarely examined at microgeographic scales in poikilothermic animals (but see [14], [102][104].…”
Section: Discussionmentioning
confidence: 99%
“…An increasingly popular (but less rigorous) alternative is to test for CGG by observing growth in the field, correcting for the thermal opportunity for growth, and then regressing corrected growth against latitude (e.g., Power and McKinley 1997;Conover et al 2009;Chavarie et al 2010). A positive relationship is considered evidence for CGG.…”
Section: Introductionmentioning
confidence: 99%