Jorge Acevedo | Centro de Estudios del Cuaternario (original) (raw)
Papers by Jorge Acevedo
Polar Biology, 2011
The occurrence of dwarf minke whales (Balaenoptera acutorostrata subsp.) around the Antarctic Pen... more The occurrence of dwarf minke whales (Balaenoptera acutorostrata subsp.) around the Antarctic Peninsula was examined based on 406 sightings of minke whales recorded during the Chilean Antarctic Scientific Expeditions and other opportunistic cetacean surveys. Identification of the species was made only for the whales sighted in the proximity of the vessels when the specific diagnostic characters could be confirmed. Of
Rev. biol. mar. oceanogr
Abstract.-Surface feeding behavior of 37 identified humpback whales in the Magellan Strait are re... more Abstract.-Surface feeding behavior of 37 identified humpback whales in the Magellan Strait are reported with the aim of describing feeding behavior and investigating whether differences in prey type determine the feeding strategy in this area. A total of three lunging ...
RESUMEN: Se entrega información sobre la distribución y el tamaño de la población actual, las cap... more RESUMEN: Se entrega información sobre la distribución y el tamaño de la población actual, las capturas y el estado de conservación de las especies de carnívoros marinos (lobos, focas y nutrias) presentes en todo el litoral sudamericano y antártico del territorio chileno, agrupadas en 7 géneros (Otaria, Arctocephalus, Mirounga, Lobodon, Hydrurga, Leptonychotes y Ommatophoca) y 3 familias (Otariidae, Phocidae y Mustelidae). Además, se resume la legislación nacional para la protección y administración de estos recursos, sus principales problemas de conservación, medidas que se requiere adoptar para enfrentarlos, convenciones y programas suscritos por el país para su protección y entidades nacionales e internacionales responsables de la protección de estas especies.
Anales del Instituto de la Patagonia, 2013
The objective of this study was to make a review of the current state of knowledge on the Coastal... more The objective of this study was to make a review of the current state of knowledge on the Coastal Marine Protected Area (CMPA) Francisco Coloane in terms of the physical and chemical oceanography, the phyto-zooplankton compositions and the fish, birds and marine mammals species present, and provide temperature and salinity data collected during a marine survey carried out the 2012 fall season. Surface temperatures fluctuate etween 2.0 and 9.0°C. Salinity varies between 23 and 30.9 PSU. The most oxygenated waters and those of highest pH were recorded within Seno Ballena (320-340 μmoles Kg-1; 8.11 units of pH). In spring nutrient levels indicate low surface concentrations, except for phosphate, the phytoplankton is dominated by diatoms and the zooplankton is composed of copepods and meroplanktonic larvae with high abundance levels in the Jeronimo Channel. The family of fish most representative is the Nototheniidae, and among marine birds and mammals, the Magellan penguin and the humpback whale are the most sighted. The review indicates that it is necessary to make further studies on physical oceanography and the benthic community of CMPA.
Revista de biología marina y oceanografía, 2008
Bol. Antárt. Chileno, 1998
In light of the recent documentation of humpback whale migration between American Samoa and the A... more In light of the recent documentation of humpback whale migration between American Samoa and the Antarctic Peninsula, we undertook a comparison of individual identification photographs from French Polynesia and the Antarctic Peninsula and Strait of Magellan. The French Polynesia catalogue (n=439) spans 1995-2007 seasons, and the Antarctic Peninsula/Strait of Magellan catalogues (n=369) include the 1994/1995 season through the 2007/2008 season.
The Eastern South Pacific humpback whale population winter primarily off Colombia and Ecuador, an... more The Eastern South Pacific humpback whale population winter primarily off Colombia and Ecuador, and migrate south to the Antarctic Area I feeding ground during the austral summer. In recent years humpback whales have been recorded feeding in the Patagonian channels of South America during the summer and fall seasons. Previously, a first migratory link was established between the Magellan Strait
Humpback whales migrate annually between high latitude feeding grounds and low latitude breeding ... more Humpback whales migrate annually between high latitude feeding grounds and low latitude breeding grounds, exhibiting a marked degree of fidelity to migratory destinations. Southeastern Pacific humpback whales migrate between the reproductive area located principally off Ecuador and Colombia and the feeding area located around the Antarctic Peninsula. Previous studies suggested a second feeding area for this population in the Magellan
Marine Mammal Science, 2007
The Eastern South Pacific humpback whale population (or stock G) winters primarily off Colombia a... more The Eastern South Pacific humpback whale population (or stock G) winters primarily off Colombia and Ecuador and spend the summer in feeding areas in the Magellan Strait and around the Antarctic Peninsula. In recent years humpback whales have been observed in the northern part of the Chilean Patagonian channels (Corcovado Gulf) during the summer and fall seasons. To investigate whether the Corcovado Gulf represent a feeding area destination for part of the Eastern South Pacific population, or alternatively, a migratory corridor to the more southern Magellan Strait or Antarctic feeding areas, photo- id pictures from the three relevant localities (Corcovado Gulf, Magellan Strait and Antarctic Peninsula), were examined. The absence of matches between the Corcovado Gulf and the Magellan Strait and Antarctic Peninsula suggest that the Corcovado Gulf might be a summer migratory destination for at least part of the Eastern South Pacific population. This result should be considered as prelim...
The Eastern South Pacific humpback whale population winter primarily off Colombia and Ecuador, an... more The Eastern South Pacific humpback whale population winter primarily off Colombia and Ecuador, and migrate south to the Antarctic Area I feeding ground during the austral summer. In recent years humpback whales have been recorded feeding in the Patagonian channels of South America during the summer and fall seasons. Previously, a first migratory link was established between the Magellan Strait feeding area and the primarily wintering grounds off Ecuador and Colombia, but also with new wintering grounds of Panama and Costa Rica. Here we present further evidence of a migratory relationship between the Magellan Strait and Panama, as well as we inform on four new matches between Magellan Strait and Ecuador. In the latter locality the animals have been sighted once on a single occasion, suggesting that they possibly are travelling towards northern waters. We report a re-sighting between the Magellan Strait and Panama which remarkably corresponded to the same matched individual previously...
Polar Biology, 2011
The occurrence of dwarf minke whales (Balaenoptera acutorostrata subsp.) around the Antarctic Pen... more The occurrence of dwarf minke whales (Balaenoptera acutorostrata subsp.) around the Antarctic Peninsula was examined based on 406 sightings of minke whales recorded during the Chilean Antarctic Scientific Expeditions and other opportunistic cetacean surveys. Identification of the species was made only for the whales sighted in the proximity of the vessels when the specific diagnostic characters could be confirmed. Of
Rev. biol. mar. oceanogr
Abstract.-Surface feeding behavior of 37 identified humpback whales in the Magellan Strait are re... more Abstract.-Surface feeding behavior of 37 identified humpback whales in the Magellan Strait are reported with the aim of describing feeding behavior and investigating whether differences in prey type determine the feeding strategy in this area. A total of three lunging ...
RESUMEN: Se entrega información sobre la distribución y el tamaño de la población actual, las cap... more RESUMEN: Se entrega información sobre la distribución y el tamaño de la población actual, las capturas y el estado de conservación de las especies de carnívoros marinos (lobos, focas y nutrias) presentes en todo el litoral sudamericano y antártico del territorio chileno, agrupadas en 7 géneros (Otaria, Arctocephalus, Mirounga, Lobodon, Hydrurga, Leptonychotes y Ommatophoca) y 3 familias (Otariidae, Phocidae y Mustelidae). Además, se resume la legislación nacional para la protección y administración de estos recursos, sus principales problemas de conservación, medidas que se requiere adoptar para enfrentarlos, convenciones y programas suscritos por el país para su protección y entidades nacionales e internacionales responsables de la protección de estas especies.
Anales del Instituto de la Patagonia, 2013
The objective of this study was to make a review of the current state of knowledge on the Coastal... more The objective of this study was to make a review of the current state of knowledge on the Coastal Marine Protected Area (CMPA) Francisco Coloane in terms of the physical and chemical oceanography, the phyto-zooplankton compositions and the fish, birds and marine mammals species present, and provide temperature and salinity data collected during a marine survey carried out the 2012 fall season. Surface temperatures fluctuate etween 2.0 and 9.0°C. Salinity varies between 23 and 30.9 PSU. The most oxygenated waters and those of highest pH were recorded within Seno Ballena (320-340 μmoles Kg-1; 8.11 units of pH). In spring nutrient levels indicate low surface concentrations, except for phosphate, the phytoplankton is dominated by diatoms and the zooplankton is composed of copepods and meroplanktonic larvae with high abundance levels in the Jeronimo Channel. The family of fish most representative is the Nototheniidae, and among marine birds and mammals, the Magellan penguin and the humpback whale are the most sighted. The review indicates that it is necessary to make further studies on physical oceanography and the benthic community of CMPA.
Revista de biología marina y oceanografía, 2008
Bol. Antárt. Chileno, 1998
In light of the recent documentation of humpback whale migration between American Samoa and the A... more In light of the recent documentation of humpback whale migration between American Samoa and the Antarctic Peninsula, we undertook a comparison of individual identification photographs from French Polynesia and the Antarctic Peninsula and Strait of Magellan. The French Polynesia catalogue (n=439) spans 1995-2007 seasons, and the Antarctic Peninsula/Strait of Magellan catalogues (n=369) include the 1994/1995 season through the 2007/2008 season.
The Eastern South Pacific humpback whale population winter primarily off Colombia and Ecuador, an... more The Eastern South Pacific humpback whale population winter primarily off Colombia and Ecuador, and migrate south to the Antarctic Area I feeding ground during the austral summer. In recent years humpback whales have been recorded feeding in the Patagonian channels of South America during the summer and fall seasons. Previously, a first migratory link was established between the Magellan Strait
Humpback whales migrate annually between high latitude feeding grounds and low latitude breeding ... more Humpback whales migrate annually between high latitude feeding grounds and low latitude breeding grounds, exhibiting a marked degree of fidelity to migratory destinations. Southeastern Pacific humpback whales migrate between the reproductive area located principally off Ecuador and Colombia and the feeding area located around the Antarctic Peninsula. Previous studies suggested a second feeding area for this population in the Magellan
Marine Mammal Science, 2007
The Eastern South Pacific humpback whale population (or stock G) winters primarily off Colombia a... more The Eastern South Pacific humpback whale population (or stock G) winters primarily off Colombia and Ecuador and spend the summer in feeding areas in the Magellan Strait and around the Antarctic Peninsula. In recent years humpback whales have been observed in the northern part of the Chilean Patagonian channels (Corcovado Gulf) during the summer and fall seasons. To investigate whether the Corcovado Gulf represent a feeding area destination for part of the Eastern South Pacific population, or alternatively, a migratory corridor to the more southern Magellan Strait or Antarctic feeding areas, photo- id pictures from the three relevant localities (Corcovado Gulf, Magellan Strait and Antarctic Peninsula), were examined. The absence of matches between the Corcovado Gulf and the Magellan Strait and Antarctic Peninsula suggest that the Corcovado Gulf might be a summer migratory destination for at least part of the Eastern South Pacific population. This result should be considered as prelim...
The Eastern South Pacific humpback whale population winter primarily off Colombia and Ecuador, an... more The Eastern South Pacific humpback whale population winter primarily off Colombia and Ecuador, and migrate south to the Antarctic Area I feeding ground during the austral summer. In recent years humpback whales have been recorded feeding in the Patagonian channels of South America during the summer and fall seasons. Previously, a first migratory link was established between the Magellan Strait feeding area and the primarily wintering grounds off Ecuador and Colombia, but also with new wintering grounds of Panama and Costa Rica. Here we present further evidence of a migratory relationship between the Magellan Strait and Panama, as well as we inform on four new matches between Magellan Strait and Ecuador. In the latter locality the animals have been sighted once on a single occasion, suggesting that they possibly are travelling towards northern waters. We report a re-sighting between the Magellan Strait and Panama which remarkably corresponded to the same matched individual previously...