We studied leucocyte levels in
several Antarctic and non-Antarctic penguins. A total of 107 blood samples of
chinstrap Pygoscelis antarctica,
gentoo P. papuaand Adélie P. adeliaepenguins at Isla 25 de
Mayo/King George Island (South Shetland Islands, Antarctica) and Magellanic
penguins Spheniscus magellanicus at
Península Valdés (Chubut, Argentina), were collected and analysed during the
2009-2010 breeding season. We observed that chinstrap and Adélie penguins had
lower total leucocyte counts than Magellanic and gentoo penguins. We provide
some potential explanations for species differences in leucocyte levels.
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