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Seabirds ingest plastic particles floating on the surface of the world's oceans. The birds can ingest plastic particles that they mistakenly identify as prey items. Alternatively, plastics can be taken up in the stomach contents of prey species. Plastic is often passed from parents to chicks in regurgitated food. In this study, individual petrels and albatrosses brought in by the tide onto Ilha Comprida beach between January 2000 and December 2002 were collected. Ilha Comprida, a barrier island in southern São Paulo, Brazil, was traversed by car along a transect of 70 kilometers. A total of 110 birds of 10 species were collected and 64.54% had plastic particles in their stomach. Frequencies of occurrence were Macronectes giganteus (64.28%), Thalassarche melanophrys (73.07%), Thalassarche chlororhinchos (44.44%), Puffinus puffinus (85.71%), Puffinus gravis (7.41%), Puffinus griseus (63.63%), Fumarus glacialoides (33.33%), Daption capensis (75%), Pachyptila belcheri (33.33%), Procellaria aequinoctialis (25%). These results demonstrated the extent of contamination with plastic and the possible harmful effects on seabirds. As aves marinhas ingerem partículas plásticas que ficam flutuando na superfície dos oceanos. Estes animais podem ingerir as partículas plásticas confundindo com as presas. Alternativamente os plásticos podem vir de presas, as quais os contêm em seus estômagos. Os plásticos podem ainda, serem passados dos pais para os ninhegos, quando regurgitam o alimento. Neste trabalho foram coletados indivíduos de petréis e albatrozes ao longo da praia da Ilha Comprida entre janeiro de 2000 a dezembro de 2002. Para tanto a Ilha Comprida, uma ilha de barreira situada no litoral sul do Estado de São Paulo, foi percorrida de carro ao longo de um transecção de 70 quilômetros.Foram coletados 110 indivíduos de aves de 10 espécies, das quais 64.54% continham partículas plásticas em seus estômagos. As Freqüências de ocorrências foram: Macronectes giganteus (64.28%), Thalassarche melanophrys (73.0%), Thalassarche chlororhinchos (44.44%), Puffinus puffinus (85.71%), Puffinus gravis (7.41%), Puffinus griseus (63.63%), Fumarus glacialoides (3.33%), Daption capensis (75%), Pachyptila belcheri (3.33%), Procellaria aequinoctialis (25%). Esses resultados demonstram a extensão da contaminação por plástico sobre as aves marinha

Occurrence of plastic particles in procellariiforms, south of São Paulo state (Brazil)