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A comparison of pigmentation features among North Atlantic killer whale (Orcinus orca) populations

  • Pirjo Mäkeläinen (a1), Ruth Esteban (a2), Andrew D. Foote (a3), Sanna Kuningas (a4), Julius Nielsen (a5), Filipa I.P. Samarra (a4) (a6), Tiu Similä (a7), Nienke C.F. van Geel (a8) and Gíslia A. Víkingsson (a6)...
Abstract

Here we present a comparison of saddle and eye patch patterns of killer whales from Norwegian, Icelandic, British, Spanish and Greenlandic waters. We found only a small amount of variation in saddle patch shapes, which may reflect a recent phylogenetic divergence from the most recent common ancestor. Eye patch shapes were more variable than saddle patches in small details. Most individuals had eye patches with parallel orientation, with the exception of a small group of killer whales from the Hebrides, which, as previously reported, had sloping eye patches that sloped downward at the posterior end. This differentiation in pigmentation patterns of the Hebridean killer whales from neighbouring populations could reflect one or more of several evolutionary processes, including a deeper phylogenetic divergence, low gene flow with other local populations and drift.

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Correspondence should be addressed to: P. Mäkeläinen, Seulastentie 12 C, 00740 Helsinki, Finland email: pirjo.makelainen@saunalahti.fi
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Journal of the Marine Biological Association of the United Kingdom
  • ISSN: 0025-3154
  • EISSN: 1469-7769
  • URL: /core/journals/journal-of-the-marine-biological-association-of-the-united-kingdom
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