Juan Cesar Paggi

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Macrophytes can structure biological assemblages in subtropical lakes. Zooplankton often uses them as a refuge, but in the absence of predators many species frequently avoid them. It is hypothesized that plant exudates can act as “repellent factors” because they can be detrimental to the animals’ life history. This work aimed to test both assumptions:(More)
Fish can have an important role in the passive dispersal of freshwater zooplankton. In the Paraná River system the migratory fish Prochilodus lineatus (Valenciennes) constitutes about 60% of the fish biomass, the adult individuals have an ilyophagous feeding mode adapted to feed on soft bottom sediments. We hypothesize that P. lineatus ingests resting(More)
The resting stages of freshwater zooplankton constitute a special mechanism for passive dispersal, often displaying a variety of adaptations so as to ease transport. In floodplain systems, macrophytes are one of the most representative biotic groups showing interactions with the zooplankton community. The annual fluctuations in the hydrometric level of the(More)
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