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Distribution of backswimmers in shallow ponds of Patagonia and their predatory role on a common tadpole-copepod assemblage
(Royal Society of New Zealand, 2012-12)
In this study, the distribution and occurrence of backswimmers in 21 fishless ponds was analysed in the Nahuel Huapi National Park (Patagonia, Argentina). We performed laboratory experiments to study the impact of different ...
Assessing the relevance of top-down and bottom-up effects as phytoplankton structure drivers in a subtropical hypereutrophic shallow lake
(Springer, 2019-03-22)
Although several studies explain the trophic cascade in water systems, we lack knowledge about top-down–bottom-up effects on phytoplankton from eutrophic lakes. In this study, we tested the importance of trophic cascades ...
The predator and prey behaviors of crabs: from ecology to neural adaptations
(Company of Biologists, 2017-07)
Predator avoidance and prey capture are among the most vital of animal behaviors. They require fast reactions controlled by comparatively straightforward neural circuits often containing giant neurons, which facilitates ...
Growth and cytometric diversity of bacterial assemblages under different top-down control regimes by using a size-fractionation approach
(Oxford University Press, 2018-03)
Zooplankton communities in tropical inland waters are generally characterized by small bodied individuals and the absence of large daphnids. However, the effects of this peculiar food web configuration on microbial ...
Building multiple nests is associated with reduced breeding performance in a south temperate population of Grass Wrens Cistothorus platensis platensis
(Wiley Blackwell Publishing, Inc, 2020-01)
Grass Wrens Cistothorus platensis build two types of non-breeding nest structures: platforms and dummy nests. Platforms are rudimentary accumulations of grasses concealed between vegetation. Dummy and breeding nests are ...
Diet Variation of a Generalist Predator, the American Kestrel Falco sparverius, in a Gradient of Agricultural Intensification in Central Argentina
(Polish Academy of Sciences. Museum and Institute of Zoology, 2021-03-20)
Agricultural expansion at the expense of natural habitats and the intensification processes in agricultural production are globally among the main causes of biodiversity and ecosystem services loss at large scale. This ...
Feeding ecology of the apron ray Discopyge tschudii (Elasmobranchii, Narcinidae) in San Jorge Gulf, Patagonia, Argentina
(Cambridge University Press, 2016-08)
The study of the feeding habits of elasmobranch populations should help to elucidate the ecological role of these fishes in the marine ecosystem. Feeding habits of the apron ray, Discopyge tschudii from San Jorge Gulf were ...
Backing up from negative stimuli: A back-thrust mechanism during escape-like response in wild sevengill sharks (Notorynchus cepedianus)
(Wiley Blackwell Publishing, Inc, 2020-10-30)
Broadnose sevengill sharks (Notorynchus cepedianus) show great interest for bait and display arepertoire of movements while engaging with it. A novel back-thrust mechanism is described in wild sevengill sharks by which ...
Flexible paddle sheds new light on speed: A novel method for the remote measurement of swim speed in aquatic animals
(Inter-Research Science Center, 2008-12)
Speed is a key determinant of energy expenditure in free-living animals, and particularly in marine vertebrates, where power requirements for swimming increase as a cubed function of the speed. However, current devices ...
Differential piscivory of the native Percichthys trucha and exotic salmonids upon the native forage fish Galaxias maculatus in Patagonian Andean lakes
(Elsevier Gmbh, 2007-02)
The present paper analyses predation patterns, of Percichthys trucha and salmonid fish upon Galaxias maculatus in five lakes of northern Patagonia with differing community and environmental characteristics. Tank experiments ...