Figure 2
Long-term (a,c) and seasonal trend (b,d) in δ13C and δ15N values for fin whales sampled in the St. Lawrence Estuary between 1998 and 2006, superimposed with groups of fin whales as defined from the hierarchical cluster analysis (different symbols and colors). The y-axis shows deviations from mean isotopic values; shaded areas represent the 95% credibility interval around the generalized additive model; the dotted line represents the time of observed changes.
