FOOD CONCENTRATION AND TEMPERATURE EFFECTS ON LIFE CYCLE CHARACTERISTICS OF TROPICAL CLADOCERA (Daphnia gessneri Herbst, Diaphanosoma sarsi Richard, Moina reticulata (Daday)): I. DEVELOPMENT TIME [PDF]
The effects of food concentration and temperature on embryonic and postem-bryonic duration of three tropical species, Daphnia gessneri(1.5mm), Diaphanosoma sarsi(1.2mm) and Moina reticulata(0.8mm), were investigated as part of life cycle studies which ...
Elsa. R. HARDY, A. DUNCAN
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A preliminary investigation on the cyclomorphosis of Daphnia gessneri Herbst, 1967, in a Brazilian reservoir [PDF]
The eyclom orphosis of a natural population of Daphnia (D . gessneri H erbst, 1967) in Am ericana Reservoir (B razil) is investigated during one year. T he structures considered w ere helmet, head basis, carapace and spine of carapace, m easured in two ...
M. Zago
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Zooplankton communities and their relationship with water quality in eight reservoirs from the midwestern and southeastern regions of Brazil [PDF]
Zooplankton are widely recognised as being regulated primarily by predators and food availability. In reservoirs, the quantity and quality of food resources are generally affected by the characteristics of the water, which in turn are controlled by the ...
P. H. S. Picapedra +3 more
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Experiments on the influence of Chaoborus brasiliensis Theobald, 1901 (Diptera: Chaoboridae) on the diel vertical migration of microcrustaceans from Lake Monte Alegre, Brazil Experimentos sobre a influência de Chaoborus brasiliensis (Diptera: Chaoboridae) sobre a migração vertical de microcrustáceos do Lago Monte Alegre, Brasil [PDF]
The aim of this work was to evaluate whether diel vertical migration of microcrustaceans from Lake Monte Alegre is related to invertebrate predators, namely larvae of Chaoborus brasiliensis. The hypothesis tested in the experiments was that the migratory
WJ. Minto, MS. Arcifa, A. Perticarrari
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Is competition an interaction as relevant as predation for tropical planktonic cladocerans?
Aim To test the relevance of competition and predation for the two most abundant and frequent cladoceran populations, the medium-sized Ceriodaphnia richardi Sars, 1901 and the large-sized Daphnia gessneri Herbst, 1967, in a tropical shallow lake ...
Tânia Cristina dos Santos Ferreira +2 more
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The seston of the small, shallow, and tropical lake Monte Alegre was tested for quantity and quality for cladocerans by growth bioassays, which were carried out in spring (Daphnia gessneri and Moina micrura), summer (D. gessneri, M. micrura, Ceriodaphnia
A. S Ferão-Filho +2 more
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Aim: The objective of this study was to investigate the spatial and temporal variation of microcrustacean assemblages of a reservoir in the Brazilian semiarid region.
Josiane Souza Santos +2 more
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The planktonic Cladocera (Crustacea) and aspects of the eutrophication of Americana Reservoir, Brazil [PDF]
Este trabalho refere-se a estudos levados a efeito na Represa de Americana, 22°44’20” S e 44°19’22” W. de junho de 1969 a abril de 1972. Esta represa e formada pelo represamento do Rio Atibaia, o qual recebe esgoto domestico e industrial nao sujeito a ...
M. Zago
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Na região semi-árida, os reservatórios desempenham importante papel para o desenvolvimento regional, o que resulta no aumento da pressão antrópica no seu entorno, acarretando mudanças na qualidade da água.
Nadson Ressyé Simões +1 more
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Competition of Cladocerans for Natural Seston from a Tropical Shallow Lake
The planktonic cladocerans Ceriodaphnia richardi, Daphnia gessneri, and Daphnia birgei inhabit the limnetic and littoral zones of Lake Monte Alegre, where the former species tends to be abundant. Laboratory experiments were carried out to investigate the
T. Ferreira, L. H. S. Silva, M. Arcifa
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