| genetic differentiation and phylogeography of gulls in the larus cachinnans-fuscus group (aves: charadriiformes). | we studied mitochondrial genetic differentiation among nine taxa of large gulls of the larus cachinnans-fuscus group, which form part of the circumpolar herring gull complex. our primary interest was to see if there were unrecognized gene flow barriers, to what extent mitochondrial genetic population structure conformed to current taxonomic boundaries, and what it might reveal about possible differences in population history. sequences (430 nucleotides) of the hypervariable control region i (hvr ... | 2001 | 11742547 |