Eliana Paola Acuña

• El Centro de Estudios del Cuaternario de Fuego - Patagonia and Antarctica

The nesting site of Magellanic penguins (Spheniscus magellanicus) at Tucker islets (54°09'S; 70°17'W), Chile, is documented and information from the first population abundance estimate on the largest islet during the beginning of chick rearing is provided. Ground-based counts yielded an estimate of 8883 (95% Confidence Intervals: 6653–11,802) burro...

The octopus fishery in the southern tip of South America is based on Enteroctopus megalocyathus . It is fished on both the Atlantic and Pacific coasts, but no study has yet investigated the genetic variability of this octopus, which is frequently collected as bycatch. The genetic identity and diversity of E. megalocyathus from specimens caught by t...

Eastern South Pacific humpback whales (Megaptera novaeangliae) migrate to three distinct mid- to high-latitude feeding areas. While movements between local breeding sites have been reported, interchange among the feeding areas has not been documented and thus has assumed not to exist. Identifying photographs of 187 humpback whales in the Magellan S...

Although Lithodes santolla is a resource with high commercial importance that has aroused interest in controlled reproduction in captivity, currently, little knowledge is available about basic reproductive aspects of this species. This research study describes detailed oogenesis stages at the histological level in adult females of the southern king...

The eastern South Pacific southern elephant seal population was extinguished by extensive hunting and the current presence of this species in this area is not well understood. We reviewed existing records from the 1900s to 2014 in the eastern South Pacific, as well as tagged seals and movement records in order to assess the potential immigration so...

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 li...

Molecular phylogenetic analyses of 16 species of the freshwater prawn genus Macrobrachium from Mexico are presented. The phylogenetic reconstructions are based on partial sequences from16S rDNA mitochondrial gene. The results show a clear separation of the species with extended larval development (ED) from those with abbreviated larval development...

Molecular phylogenetic analyses of 16 species of the freshwater prawn genus Macrobrachium from Mexico are presented. The phylogenetic reconstructions are based on partial sequences from16S rDNA mitochondrial gene. The results show a clear separation of the species with extended larval development (ED) from those with abbreviated larval development...

Argentine shrimp fishery in Patagonia was managed since its beginning as a single stock. The fishery research done on this issue considered that the concept of stock unity and cohort monitoring could not be applied to Argentine shrimp fishery. The annual landings of shrimp presented significant variations in number, which could not been explained i...

Sightings of 115 leopard seals, Hydrurga leptonyx, have been recorded along the Chilean coasts from 1927 to 2010. Mostly immature seals occurred in northern and central Chile (18°20́S-39°59́S), especially in winter, while immature and adult individuals of both sexes and in good condition were commonly sighted year-round in glacial areas of southern...

Natural history of the biggest National Park in Chilean Patagonia, with description of flora and fauna, geology and anthropology.

Mitochondrial DNA control region sequences were analyzed to investigate population structure and possible migratory links of common minke whales (Balaenoptera acutorostrata) in two ocean basins: western South Atlantic (WSA) and western South Pacific (WSP). The results of several different phylogenetic estimations consistently grouped all haplotypes...

Surface temperature (ST) has been historically recorded in meteorological stations ai specific geographic locations. That data has been used later as a proxy for larger areas, despite knowing that ST changes accordingly to local factors, such as topography and latitude. More recently, small-scale variations on ST have been estimated by satellite im...

Latitudinal preferences within the breeding range have been suggested for Breed- ing Stock G humpback whales that summer in different feeding areas of the eastern South Pacific. To address this hypothesis, humpback whales photo-identified from the Antarctic Peninsula and the Fueguian Archipelago (southern Chile) were com- pared with whales photo-id...

Two species of minke whale have been recognised, the larger Antarctic minke whale (Balaenoptera bonaerensis) restricted to the Southern Hemisphere, and the common minke whale (B. acutorostrata), which is distributed globally. The common minke whale of the Southern Hemisphere is referred to as the dwarf minke whale. The occurrence and identity of mi...

ANTECEDENTES Los lugares de reproducción del alba-tros de ceja negra, Diomedea melanophris Temmink 1828 (Aguayo-Lobo et al. 2001, infor-man sobre el nombre genérico usado por otros autores), conocidos hasta el momento en el país, corresponden a las islas Diego de Almagro, islas Ildefonso e isla Diego Ramírez (Pisano 1972, Clarke et al 1992, Schlatt...