04 jan 2014

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Alaskan Glaucous Gull

 Larus hyperboreus barrovianus   (in the North Sea)

   On 5th February 2009 I found a dead 3rd winter Glaucous Gull Larus hyperboreus on the south bank of the gateway to the Port of Rotterdam at 51.58'.15N 04.02'.54E. The corpse had been some days in the water. Among other things it's biometrics showed it to be an Alaskan Glaucous Gull of the race barrovianus. To our knowledge the Alaskan Glaucous Gull has never been reported from the North Sea area before. During January violent storms battered the Atlantic coasts of France and Spain bringing with them unusually large numbers of Glaucous and Iceland Gulls.


 glaucousgull alaskan/1.Alaskan Glaucous Gull Larus hyperboreus barrovianus 05022009 Rotterdam,The Netherlands.jpg
1.Alaskan
Glaucous Gull Larus hyperboreus barrovianus 05022009 Rotterdam,The Netherlands


glaucousgull alaskan/2. Alaskan Glaucous Gull Larus hyperboreus barrovianus wing 05022009 Rotterdam, The Netherlands.jpg
2. Alaskan Glaucous Gull Larus hyperboreus barrovianus wing 05022009 Rotterdam, The Netherlands



glaucousgull alaskan/3. Alaskan Glaucous Gull Larus hyperboreus barrovianus underwing 05022009 Rotterdam, The Netherlands.jpg
3. Alaskan Glaucous Gull Larus hyperboreus barrovianus underwing 05022009 Rotterdam, The Netherlands


glaucousgull alaskan/4.Glaucous Gull Larus h.barrovianus ad winter Jan. New Foundland c Peter de Knijff.jpg
4.Glaucous Gull Larus h.barrovianus ad winter Jan. New Foundland c Peter de Knijff


glaucousgull alaskan/5.Glaucous Gull prob. Larus h.barrovianus 3rd W Jan. New Foundland c Peter de Knijff.jpg
5.Glaucous Gull prob. Larus h.barrovianus 3rd W Jan. New Foundland c Peter de Knijff

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Notice:

Two excellent gullstudies i.e. the disertations of Dr's Dorit Liebers and Ronald Klein, can be downloaded as PDF files here: 

http://www.greengull.de/

http://www.greengull.de/img/dissertation_rklein.pdf

http://www.greengull.de/img/dissertation_dliebers.pdf

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AND MORE...:

Interesting studies on gull genetics

1. de Knijff P, Denkers F, van Swelm N D, Kuiper M (2001) Genetic affinities within the herring Gull Larus argentatus assemblage revealed by AFLP genotyping. J Mol Evol 52: 85 - 93.

2. Liebers D, Helbig AJ, de Knijff P (2001) Genetic differentiation and phylogeography of gulls in the Larus cachinnans-fuscus group (Aves: Charadriiformes). Mol Ecol 10: 2447 - 2462.

3. Liebers D, Helbig AJ (2002) Phylogeography and colonization history of Lesser Black-backed Gulls (Larus fuscus) as revealed by mtDNA sequences. J
Evol Biol 15: 1021 - 1033.

4. Liebers D, de Knijff P, Helbig AJ (2004) The herring gull complex is not a ring species. Proc R Soc Lon B 271: 893 - 901.

5. de Knijff P, Helbig A J, Liebers D (2005) The Beringian connection: speciation in the Herring Gull assemblage of North America. Birding 37: 402 - 411.

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