The impact of Glaucous Gull (Larus hyperboreus) predation on the Little Auk (Alle alle) during breeding season at the Ariekammen slopes in Hornsund was compared between 1983 and 2003-04. During the nestling period, gulls killed more young Little Auks in 1983 than in 2003. During the period of the colony departure in 2003, there were more Glaucous Gulls present and they killed more Little Auks than 20 years previous. Changes were found in the strategy of the colony departure by the Little Auk. In 2004, the rate of fledglings departed from the colony during “day” hours was higher than in 1983 and a higher proportion of fledglings left the colony escorted by more than one adult bird. This could be a consequence of general increase in the Glaucous Gull numbers or a year-to-year fluctuation and needs further investigations.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 28 • No. 4