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| Andriolo,Artur; Piovezan,Ubiratan; Costa,Mateus J.R. Paranhos da; Torres,Hermógenes A.; Vogliotti,Alexandre; Zerbini,Alexandre N.; Duarte,José M. B.. |
| Balancing power production and environmental conservation can be problematic. The objective of this study was to investigate the abundance of marsh deer in the Paraná River Basin, above the Sergio Motta (Porto Primavera) Dam, before and after the impact of the dam closure. A fixed-wing, flat window aircraft was used to survey study transects. Observations were recorded based on the distance sampling line transect method, assuming that the detection probability decreases with increased distance. The abundance of marsh deer in the survey region prior to flooding was estimated to be 974 individuals (CV = 0.23). The overall abundance dropped from 974 to 444 (CV = 0.26) individuals after flooding, an overall reduction of 54%. This reduction can be attributed to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abundance; Anthropogenic impact; Cervids; Distance sampling; Distribution. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000600007 |
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| Andriolo,Artur; Rocha,Jesuina M. da; Zerbini,Alexandre N.; Simões-Lopes,Paulo C.; Moreno,Ignacio B.; Lucena,Alineide; Danilewicz,Daniel; Bassoi,Manuela. |
| Ship-based sighting surveys for cetaceans were conducted in the former whaling ground off the northeastern coast of Brazil. The cruises took place in winter and spring of 1998-2001 with the objectives of investigating current distribution and abundance of cetaceans, particularly large whale species taken during whaling. In 1998 the survey were conducted between the parallels 5°30'W and 9°S and the 200 m isobath and the meridian 033°W. A total of about 3,100 nm were surveyed between 1998 and 2001 Surveys were conducted using line transect methods from about 5-10°S, and from the coast to 33°W. A total of 151 sightings (203 individuals) of large whales were recorded on effort. The Antarctic minke whale - Balaenoptera bonaerensis (Burmeister, 1867) was the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bryde's whale; Minke whale; Sei whale; Sperm whale; South Atlantic. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000500011 |
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| Andriolo,Artur; Zerbini,Alexandre N.; Moreira,Sergio; Pizzorno,José L.; Danilewicz,Daniel; Maia,Ygor G.; Mamede,Natália; Castro,Franciele R. de; Clapham,Phillip. |
| The social structure of humpback whales in their tropical wintering grounds is very fluid. To date, no information has been published for cases in which two whales were both satellite-tagged while in association. Here, we report the movements of four humpback whale pairs tagged together off the coast of Brazil. Fieldwork and satellite tagging of humpback whales was conducted between 2003 and 2008 along the eastern coast of Brazil, between 20°S and 8°S. Movement was monitored while whales were still in their breeding ground. A switching state space model was applied to the filtered data of each humpback whale to standardize telemetry data and allow direct comparison of each individual track. GIS was used to plot model-predicted locations and to visually... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cetacean; Large whale; Satellite telemetry; Social behavior; SSSM. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702014000200001 |
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