Avifauna associada ao estuário do Saco da Fazenda, Itajaí, Santa Catarina, Santa Catarina Avifauna associated to the estuary of Saco da Fazenda, Itajaí, Santa Catarina, Brazil

<abstract language="eng">The estuary is an important feeding and resting site for mixed flocks of coastal seabirds, limnological inhabitants and also edge inhabitants. Once in a month, three census were done on the bird fauna with two hours intervals within observations, during the period from January/96 to December/98. The results showed the presence of 45 species, where 45,7% were regularly observed, while 17,9 occurred seasonally and 36,4% were occasional in the census. The highest abundance occurred during the winter and spring months, and the lowest during the summer and autumn. The medium annual diversity index varied between 1,68 ± 0,36 and 1,82 ± 0,34. The highest similarity of fauna was observed between the years 1997 and 1998

Flutuações sazonais na abundância de Phalacrocorax brasilianus (Gmelin) no estuário do Saco da Fazenda, Itajaí, Santa Catarina, Brasil Seasonal changes in the abundance of Phalacrocorax brasilianus (Gmelin) in the estuary of Saco da Fazenda, Itajaí, Santa Catarina, Brazil

<abstract language="eng">The Neotropic cormorant is one of the most comm on estuarine birds along SantaCatarina's shore, especially in artisanal fishery areas, where it obtains food easily. During the period from January, 1996 to December, 1999, and of January to December, 2001, the cormorants were monitored monthly in the estuary. The population P. brasilianus (Gmelin, 1789) presented seasonal changes with the same annual pattern of increment of the abundance. Significant differences were recorded between the seasons and the medium abundance of birds. Those differences can be attributed to the events of the life cicle of the species and the oscillations in the estuary water temperature

Ocorrência e abundância de Rynchops niger Linnaeus, no litoral de Santa Catarina, Brasil Occurrence and abundance of Rynchops niger Linnaeus in the coast of Santa Catarina, Brazil

O talha-mar Rynchops niger Linnaeus, 1758 habita os grandes rios, lagos e regiões costeiras durante as migrações, na América do Sul e do Norte. Esse trabalho tem por objetivo disponibilizar informações básicas sobre a ocorrência e abundância de talha-mar no litoral de Santa Catarina. Durante o período de abril/2002 a maio/2003 foram realizados censos sazonais (trimestrais) e mensais em Itajaí, com auxílio de binóculos 10 x 50. O talha-mar é mais freqüente no aterro da Baía Sul (Florianópolis), no verão e outono, na primavera-verão em São José e Tijucas e no outono-inverno no estuário do Saco da Fazenda (Itajaí). Neste estuário, a população apresentou flutuações acentuadas ao longo do ano, com as maiores abundâncias ocorrendo em agosto/2001, janeiro/2002 e março/2003.<br>The black skimmer inhabits the great rivers, lakes and coastal areas during the migrations, in South and North America. This work aims to make available basic information about the occurrence and abundance of the black skimmer in the coast of Santa Catarina. From April/2002 to May/2003 seasonal censuses were accomplished, and monthly in Itajaí, with aid of binoculars 10 x 50. The black skimmer is more frequent in the embankment of the South Bay (Florianópolis), in the summer and autumn, in the spring-summer in São José and Tijucas and in the autumn-winter in the estuary of the Saco da Fazenda (Itajaí). In this estuary, the population presented accentuated flotation along the year, with the largest abundances happening in August/2001, January/2002 and March/2003