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Seabird and marine-mammal attendance and by-catch in semi-industrial trawl fisheries in near-shore waters of northern Argentina
(Csiro Publishing, 2013-03)
Seabird and marine-mammal attendance and by-catch in mid-water and bottom otter semi-industrial coastal pair-trawl fisheries were assessed for the first time in northern Argentina. Observers were placed onboard trawlers ...
The diet of the Patagonian toothfish Dissostichus eleginoides, a deep-sea top predator off Southwest Atlantic Ocean
(Springer, 2020-10)
The present study is a valuable contribution to the knowledge of feeding habits of Patagonian toothfish Dissostichus eleginoides in Southwestern Atlantic (53–55°S, 351 to 1073 m depth) near Burdwood Bank/Namuncurá ...
Isotopic niche plasticity in a marine top predator as indicator of a large marine ecosystem food web status
(Elsevier Science, 2021-07)
As marine ecosystems are harvested or modified by anthropogenic or natural factors, there is an increasing demand for indicators of trophic web health or status. The Magellanic Penguin (Spheniscus magellanicus) is a widely ...
Foraging by the omnivorous crab Pachygrapsus transversus affects the structure of assemblages on sub-tropical rocky shores
(Inter-research, 2010-01-01)
The roles of herbivory and predation in determining the structure and diversity of communities have been tested across most intertidal systems. In contrast, the importance of omnivorous consumers remains untested in many ...
Foraging by the omnivorous crab Pachygrapsus transversus affects the structure of assemblages on sub-tropical rocky shores
(Inter-research, 2010-01-01)
The roles of herbivory and predation in determining the structure and diversity of communities have been tested across most intertidal systems. In contrast, the importance of omnivorous consumers remains untested in many ...
Short-term responses of phytoplankton to nutrient enrichment and planktivorous fish predation in a temperate South American mesotrophic reservoir
(SPRINGER, 2008-03)
Top-down and bottom-up mechanisms have been proposed as potential regulators of the phytoplankton biomass of aquatic ecosystems. We evaluated the effect of nutrient enrichment and planktivorous fish predation through a ...
Energy flow structure and role of keystone groups in shallow water environments in Isla del Coco, Costa Rica, Eastern Tropical Pacific
(2019)
Isla del Coco (Costa Rica) forms part of the five oceanic islands of the Eastern Tropical Pacific and is well known for its high biodiversity and great endemism. While several marine biological and oceanographical surveys ...
Marine mammal occurrence in deep waters of the Brazil-Malvinas confluence off Argentina during summer
(Instituto Argentino de Investigación de las Zonas Áridas. Unidad de Zoología y Ecología Animal, 2015-01-09)
This article presents the results of marine mammal occurrence at the Brazil-Malvinas Confluence in the Argentine Sea shelf break during a summer survey. A total of 61 marine mammal sightings were recorded. The most frequent ...
Back-calculation of total length of Argentine seabass Acanthistius patachonicus using morphometric relationships of bones and measurements of the body
(Instituto Nacional de Investigación y Desarrollo Pesquero, 2020-06)
Predictive regression equations were generated to estimate total length of the Argentine seabass (A. patachonicus) using skull and pectoral girdle bones, specific body and otolith lengths. Regressions of skull and pectoral ...
Mouth gape determines the response of marine top predators to long-term fishery-induced changes in food web structure
(Nature Publishing Group, 2018)
Here, we analyse changes throughout time in the isotopic niche of the Franciscana dolphin (Pontoporia blainvillei), the South American fur seal (Arctocephalus australis) and the South American sea lion (Otaria flavescens) ...