Elisa de Souza Petersen

DISTRIBUTION OF SEABIRD COLONIES IN STINKER POINT, ELEPHANT ISLAND

Stinker Point is located on Elephant Island. It presents an ice-free area where di erent seabird species breed during the austral summer. To evaluate the distribution of Antarctic seabird breeding sites, colonies and breeding groups were mapped into the study area. ere are breeding colonies of 13 species. Southern Giant Petrel Macronectes giganteus and Wilson’s Storm-petrel Oceanites oceanicus are the species with most breeding groups mapped, totaling 10 of both species, followed by Cape Petrel Daption capense with nine breeding groups recorded. e high number of species observed in Stiker Point con rms the signi cance of this area as an Important Bird Area in Antarctica (IBA 071).

INFLUENCE OF SEA SURFACE TEMPERATURE ON PELAGIC SEABIRD DISTRIBUTION IN THE SOUTH ATLANTIC OCEAN

Seabird distribution is mostly related to high primary productivity zones, as well as to abiotic factors, such as hydrographic conditions. is study aimed at evaluating the in uence of sea surface temperature on Antarctic and sub-Antarctic seabirds in the South Atlantic Ocean. Sampling was conducted on board between Rio Grande, Brazil, and Antarctica from 2009 to 2012. A PCA was performed to identify the species associations and Linear Regressions were used to identify the relation with sea surface temperature. We registered 22 Procellariiformes species, belonging to three families: Procellariidae (n=13), Diomedeidae (n=7), and Hydrobatidae (n=2). ree distinct species groups were identi ed, and two presented a signi cant relationship with sea surface temperature.

Short Note: Unusual breeding site for kelp gulls on Deception Island, Antarctica

Unusual breeding site for kelp gulls on Deception Island, Antarctica ELISA DE SOUZA PETERSEN, FERNANDA CAMINHA LEAL VALLS, GUSTAVO FRANCISCO AVER and MARIA VIRGINIA PETRY INCT-APA Instituto Nacional de Ciência e Tecnologia Antártico de Pesquisas Ambientais Universidade de São Paulo, Laboratório de Química Inorgânica Marinha, Praça do Oceanográfico, 191, 05508120, São Paulo, São Paulo, Brazil Universidade do Vale do Rio dos Sinos, Laboratório de Ornitologia e Animais Marinhos, Av. Unisinos, 950, 93022000, São Leopoldo, Rio Grande do Sul, Brazil elisapetersen@yahoo.com.br