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| LESCRAUWAET,ANNE-CATHERINE; GIBBONS,JORGE; GUZMAN,LEONARDO; SCHIAVINI,ADRIAN. |
| Abundance of Commersons dolphin, Cephalorhynchus commersonii (Lacépède 1804), in the eastern portion of the Strait of Magellan was estimated by means of aerial transects in autumn (June 1996). Using a helicopter at 100 m altitude and 129 km h-1, 58 sightings representing 98 animals (average group size Es = 1.7, SD = 0.13) along 818.6 km of linear transects were recorded. Data analysis with "Distance" software gave a density estimation of 0.34 ind km-2 (CV = 0.27) and a population size of 1,206 (95% CI 711-2,049 individuals). Commersons dolphin showed a habitat preference for the narrows, compared to open waters in the study area. |
| Tipo: Journal article |
Palavras-chave: Commersons dolphin; Cephalorhynchus commersonii; Strait of Magellan; Line transect sampling; Habitat preference. |
| Ano: 2000 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000300010 |
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| CAPELLA,JUAN J; GIBBONS,JORGE; FLÓREZ-GONZÁLEZ,LILIÁN; LLANO,MARTHA; VALLADARES,CARLOS; SABAJ,VALERIA; VILINA,YERKO A. |
| Humpback whales undertake seasonal migration between productive high-latitude areas where they feed in summer and low-latitude tropical waters where mating and calving occur during winter. In the eastern south Pacific, the species breeds off Colombia and Ecuador, and feeds primarily in the western Antarctic Peninsula and in the waters of the Strait of Magellan (SM), recently described as a new feeding ground for humpback whales. Comparison of fluke photographs of 62 individuals from the SM obtained during the austral summer from 1999 to 2005 and 1,042 individuals from Colombia, provided conclusive matches for six individuals, with an overall interchange Índex of 0.093. Eight migratory trips between summer and winter grounds were registered for four whales... |
| Tipo: Journal article |
Palavras-chave: Colombia; Humpback whales; Migration; Photo-identification; Strait of Magellan. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000400008 |
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