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OALib Journal期刊

ISSN: 2333-9721

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Seasonal abundance of the Neotropic Cormorant (Phalacrocorax brasilianus) at Lagoa dos Patos estuary, Southern Brazil
Barquete,Viviane; Vooren,Carolus Maria; Bugoni,Leandro;
El hornero , 2008,
Abstract: censuses of the neotropic cormorant (phalacrocorax brasilianus) were carried out at a power tower near the mouth of lagoa dos patos estuary, southern brazil, from november 2001 to october 2002. at this major roosting site, a total of 309 counts over 47 days of census were performed to estimate monthly variation in the abundance of the neotropic cormorant. the highest abundance occurred in january (1390 birds), and the lowest in may (117 birds). the tower was a roosting site for cormorants at night, which arrived around 15:30 h onward, with numbers increasing near dusk. birds preferentially used the lower levels of the tower (including the concrete base and levels 1 and 2) throughout the year and this preference could be partially due to strong winds in the area. migrating cormorants arrived at the estuary in winter and spring, increasing throughout the summer and severely decreasing in autumn months, when they probably moved to inland breeding grounds.
Review of records and notes on King Penguin (Aptenodytes patagonicus) and Rockhopper Penguin (Eudyptes chrysocome) in Brazil
Barquete,Viviane; Bugoni,Leandro; Silva-Filho,Rodolfo P.; Adornes,Andréa C.;
El hornero , 2006,
Abstract: a review of previous findings and new records of king penguin (aptenodytes patagonicus) and rockhopper penguin (eudyptes chrysocome) on the brazilian coast is presented. in total there are six records of the king penguin and ten records of the rockhopper penguin. juvenile and adults of both species were found stranded mostly on rio grande do sul coast, southern brazil. records of king penguins are restricted to the summer season, while records of rockhopper penguins are mostly during winter. rockhopper penguin appears to displace more regularly to the subtropical convergence area, while king penguins appear to be vagrant in brazil, following the malvinas current.
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