Ecophysiological Aspects and sxt Genes Expression Underlying Induced Chemical Defense in STX-Producing Raphidiopsis raciborskii (Cyanobacteria) against the Zooplankter Daphnia gessneri [PDF]
Toxins, 2021 Cyanobacteria stand out among phytoplankton when they form massive blooms and produce toxins. Because cyanotoxin genes date to the origin of metazoans, the hypothesis that cyanotoxins function as a defense against herbivory is still debated.
Mauro C. P. Vilar +5 more
doaj +6 more sources
Saxitoxin-Producing Raphidiopsis raciborskii (Cyanobacteria) Constrains Daphnia Fitness and Feeding Rate despite High Nutritious Food Availability [PDF]
Toxics, 2023 Changes in food quality can dramatically impair zooplankton fitness, especially in eutrophic water bodies where cyanobacteria are usually predominant. Cyanobacteria are considered a food with low nutritional value, and some species can produce bioactive ...
Gabriele Costa dos Reis +4 more
doaj +3 more sources
Spatial and temporal distribution of gerrid (Heteroptera) and predation on microcrustaceans from a tropical shallow lake [PDF]
Brazilian Journal of Biology, 2016 Predator-prey interactions involving an aquatic insect and zooplanktonic prey of different sizes were investigated to quantify prey mortality exposed to predators.
A. R. Domingos, M. S. Arcifa
doaj +3 more sources
Distribution and fluctuations of backswimmers (Notonectidae) in a tropical shallow lake and predation on microcrustaceans [PDF]
Brazilian Journal of Biology, 2017 Notonectids are widely distributed in freshwaters and can prey on zooplankton in temperate lakes. However, its role in structuring the zooplankton community is unknown in tropical lakes.
A. R. Domingos, M. S. Arcifa
doaj +4 more sources
“In vitro” evaluation of the bacterivore potential of three Cladoceran species occurring in tropical and subtropical regions [PDF]
Brazilian Journal of Biology, 2017 Cladocerans occupy an important position among the bacterial consumers in freshwater food webs, being relatively non-selective filter feeders that can exert a strong impact on microbial populations.
L. H. Hayashi-Martins +4 more
doaj +3 more sources
Grazing Responses of Distinct-Sized Tropical Cladocerans to Different Filamentous Sizes of the Cyanobacterium Dolichospermum planctonicum [PDF]
MicroorganismsCyanobacterial blooms directly influence the structure and function of zooplankton communities; however, the trophic interactions between small tropical cladocerans and the cyanobacterium Dolichospermum are still poorly understood.
Luciana Machado Rangel +4 more
doaj +3 more sources
Water mite predation on zooplankton of a tropical lake [PDF]
Brazilian Journal of Biology, 2002 Water mite (Krendowskia sp.) predation on zooplanktonic species from Lake Monte Alegre (São Paulo State, Brazil) was tested in laboratory experiments. One cladoceran, Daphnia gessneri, two copepods, Tropocyclops prasinus and Thermocyclops decipiens, and ...
C. R. CASSANO +2 more
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ABUNDANCE AND ISOTOPIC COMPOSITION OF PLANKTONIC MICROCRUSTACEANS IN A CENTRAL AMAZON FLOODPLAIN LAKE: IMPLICATIONS FOR THE TROPHIC DYNAMICS OF THE PLANKTON COMMUNITY [PDF]
Caldasia, 2016 During the hydrological year from December 2007 to November 2008, monthly samplings in the pelagic, littoral and macrophytes zones were conducted in the Lago Catalão, a floodplain lake receiving a mixture of water from Negro and Solimões Rivers, in front
Pedro Caraballo +2 more
doaj +9 more sources
VERTICAL DISTRIBUTION OF ZOOPLANKTON AND PHYSICO-CHEMICAL CONDITIONS DURING A 24-HOUR PERIOD IN AN AMAZON FLOODPLAIN LAKE - LAGO CALADO, BRAZIL [PDF]
Acta Amazonica, 1983 Summary In May 1980 Lago Calado was 9 meters deep, the water level was rising slowly, and below 4 meters the water was anoxic. Virtually all of the zooplankton was in the oxygenated layer. Adult and juvenile Daphnia gessneri, the most abundant crustacean
Thomas R. Fisher +4 more
doaj +6 more sources
Experiments on invertebrate predation on cladocerans and its relationships with lake data
Journal of Limnology, 2021 Until recently, knowledge of the impact of invertebrate predators on cladocerans in the Brazilian Lake Monte Alegre was limited to a few species. In order to assess the effects of predation on other cladoceran species, experiments were carried out with ...
Tânia C. dos Santos Ferreira +1 more
doaj +2 more sources