Association of Polar Early Career Scientists
 

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Virtual Posters

BIPARENTAL CARE OF CHINSTRAP PENGUIN: MOLECULAR SEXING AND LIFE HISTORY IN THE SOUTH SHETLAND ISLANDS, ANTARCTICA
Jaqueline Brummelhaus, Victor Hugo Valiati, Maria Virginia Petry
Terrestrial
Universidade do Vale do Rio dos Sinos (UNISINOS)
4ª Oficina de Trabalho do INCT-APA
2012
Chinstrap penguin, Pygoscelis antarctica, breeding biology involves several distinct stages of chick rearing, in which each parent varies in their relative contribution to reproductive success. We investigated tertiary adult sex ratios using molecular sexing in breeding colonies during guard and creche stages of chick rearing at Admiralty Bay (King George Island) and on Stinker Point (Elephant Island) in the 2010/2011 breeding season. We analyzed 52 blood samples and found this represented 31 males and 21 females. Observed adult sex ratio in guard and creche stages did not vary significantly. However, we feel evidence did infer differences in relative biparental care behavior between the two stages studied. Thus, it was possible to develop a potential hypothesis of relationship between sex ratio of adults present during different stages of breeding season by molecular biology technique with Chinstrap penguin life history and gain understanding of the importance of contributions of both sexes in raising their offspring and for attaining reproductive success.
Chinstrap penguin, guard and creche stage, biparental care, molecular sexing
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