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Food habits of the South American sea lion, Otaria flavescens, off Patagonia, Argentina

These stomach content analyses indicate that South American sea lions feed primarily on demersal and ben- thic species and, in general terms, use resources according to their environ- mental availability.

Fishery and Ontogenetic Driven Changes in the Diet of the Spiny Dogfish, Squalus acanthias, in Patagonian Waters, Argentina

In the present study, carried out in 1998, squid was the most important prey, followed by the hake, related to the major decrease of hake due to overfishing and the increase of squid abundance between 1994 and 1999.
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Food habits of Dipturus chilensis (Pisces: Rajidae) off Patagonia, Argentina

The food habits of the beaked skate were studied utilising 274 individuals obtained from the incidental catches of the Argentine hake fishery, and two size-related dietary shifts previously reported in this species were confirmed and related to changes in habitat utilisation.
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Abundance of small cetaceans in waters of the central Spanish Mediterranean

Seasonal aerial surveys conducted in the waters of the central Spanish Mediterranean from 2001 to 2003 using the line transect sampling methodology to estimate cetacean abundance provide valuable biological information useful to develop conservation plans and establish a baseline for future population trend studies.
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Direct and Indirect Effects of the Highseas Fisheries on the Marine Mammal Populations in the Northern and Central Patagonian Coast

Monitoring of interactions between marine mammals and fisheries along the Atlantic Patagonian coast found that mortality rates seem to be low and there is insufficient evidence of competition for prey species, however, there is concern about the large amounts of fish discarded by the fishery.
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Recovery of the South American sea lion (Otaria flavescens) population in northern Patagonia

The key in the recovery of this population includes higher survival rates of juveniles combined with increased available habitat for newly reproducing in- dividuals and this hypothesis could explain the higher rates of increase in pups in peripheral areas while reproductive rates remain unchanged.
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Dusky dolphin and tourist interaction: effect on diurnal feeding behavior

It is found that boat presence negatively affects the longer-term feeding efficiency of dusky dolphins and the time to return to feeding as well as the time it took for a group of dolphins to feed increased in the presence of commercial vessels.
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Uncinaria hamiltoni (Nematoda: Ancylostomatidae) in South American Sea Lions, Otaria flavescens, From Northern Patagonia, Argentina

Thirty-one South American sea lion pups found dead in Punta León, Argentina, during the summer of 2002, were examined for hookworms, and no apparent trend between body condition and intensity of hookworms was observed.
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Abundance and distribution of endangered Franciscana dolphins in Argentine waters and conservation implications

This is the first study in Argentine waters on the abundance of the threatened Franciscana dolphin, Pontoporia blainvillei, and density was lower in southern areas and declined with depth beyond 30-m isobaths.
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The southwestern Atlantic southern right whale, Eubalaena australis, population is growing but at a decelerated rate

Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Centro Nacional Patagonico. Centro para el Estudio de Sistemas…
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