Rotifers
Mostrando 13-24 de 41 artigos, teses e dissertações.
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13. Seletividade alimentar e produção secundária de alevinos de peixes neotropicais alimentados com Dendrocephalus brasiliensis (Pesta, 1921) e outras espécies zooplanctônicas
A larvicultura é hoje o principal entrave da aqüicultura. O alimento vivo, em especial zooplanctônico, é essencial nas fases jovens de peixes. No entanto, há dificuldades em se obter biomassa suficiente. O Anostraca Dendrocephalus brasiliensis, conhecido como branconeta, tem grande potencial de utilização na aqüicultura nacional. No presente estudo,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/07/2011
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14. Avaliação do efeito da salinidade e alimentação no desenvolvimento inicial em larvas de três espécies de caranguejos de importância econômica em laboratório. / The effect of salinity and feeding on the initial larvae development of three crabs species with economic importance in the laboratory
The present study aimed to provide information about the larval rearing of three species commercially harvested crabs in Brazil. Foremost was evaluated the influence of salinity on larval survival of U. cordatus, C. guanhumi and G. cruentata early stage of development, and subsequently the influence of diet on the early development of larvae of U. cordatus i
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/09/2010
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15. Diversity and changes in the horizontal distribution of crustaceans and rotifers in an episodic wetland of the central region of Argentina
Although episodic wetlands are very frequent environments in Argentina, the knowledge about their ecology is scarce. Thus, the aim of this study was to describe the diversity and changes in the horizontal distribution of crustaceans and rotifers in the episodic wetland El Guanaco, Province of La Pampa, Argentina, during the hydroperiod that took place betwee
Biota Neotropica. Publicado em: 2010-09
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16. Estudo da estrutura da comunidade zooplanctônica e sua relação com as cianobactérias em três reservatórios do médio rio Tietê, SP / Zooplankton structure and its relationships with cyanobacteria in three reservoirs of middle Tietê river, São Paulo State, Brazil
Cyanobacteria blooms are increasingly being detected in São Paulo state reservoirs, particularly in those of middle Tietê river basin. The presence of cyanobacteria can cause deterioration of water quality in these systems due to its potential toxicity to the aquatic biota, and also risks to human health. The aim of the present srtudy was to analyse the st
Publicado em: 2010
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17. Prey selectivity and functional response by larval red-eyed tetra Moenkhausia sanctaefilomenae (Steindachner, 1907) (Characiformes: Characidae)
Studies were carried out to quantify the functional response and prey selectivity of larval (1-5 weeks old) of Moenkhausia sanctaefilomenae, a widely cultured ornamental fish, using four rotifers (Brachionus calyciflorus, B. havanaensis, B. patulus and B. rubens) as prey. Regardless of larval age, B. havanaensis was not selected, while B. rubens and B. calyc
Brazilian Archives of Biology and Technology. Publicado em: 2009-10
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18. El zooplancton de un lago somero hipereutrófico de la región central de Argentina: cambios después de una década
The water bodies ecology is influenced by the contributions of nutrients from the basin. The shallow lentic ecosystems generally presents high levels of eutrophy, which allows to sustain a highly productive zooplanktonic fauna. According to the model of the alternative states of shallow lakes, zooplankton of these environments is characterized by a taxonomic
Biota Neotropica. Publicado em: 2008-12
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19. Aspectos do enchimento da represa Paraitinga, sistema produtor Alto Tietê: zooplâncton e qualidade da água / Aspects of the filling of Paraitinga Reservoir, Sistema Produtor Alto Tietê: zooplankton and water quality
Due to rapid population growth, construction of dams has become indispensable to meet the demand of water needed to supply the entire population and to support the social and economic system. The transformation of a river in an artificial lake not only promotes positive effects, the practice changes permanently the environment in which it is inserted, with h
Publicado em: 2008
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20. A comunidade planctÃnica como indicadora da qualidade da Ãgua em viveiros de cultivo de camarÃes no nordeste do Brasil
A disease of unknown origin is occurring in marine shrimp (Litopenaeus vannamei) ponds causing a decrease in the survival rate of cultured organisms. The disease named Idiopathic Abdominal Necrosis (IAN) have been confirmed in ponds from 14 farms located in PiauÃ, MaranhÃo, Cearà and Rio Grande do Norte states, Northeastern Brazil. In order to contribute
Publicado em: 2008
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21. Contribution to limnological knowledge of brazilian semi-arid reservoir that supply Fortalezas metropolitan region: Pacajus and Gavião dams (Ceará, Brazil) / Contribuição ao conhecimento limnológico de reservatórios do semi-árido brasileiro que abastecem a região metropolitana de Fortaleza: Açudes Pacajus e Gavião (Ceará, Brasil)
The main aim of this research was to investigate the influence of climatic and hydrodynamicsalterations about physical stability, resources availability, zooplankton community structure and spatial heterogeneity standard of Pacajus and Gavião dams, collected at two-month period between Nov. 1988 and Dec. 1998. In the reservoirs, the sample stations were dis
Publicado em: 2007
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22. Avaliação da atividade microbiana metanogênica na lagoa de estabilização anaeróbia da estação de tratamento de esgotos sanitários do município de Cajati, Vale do Ribeira do Iguape, Estado de São Paulo / Assessment of anaerobic methanogenic microbial activity at anaerobic stabilization pond of domestic wastewater plant at Cajati city, Vale do Ribeira de Iguape, São Paulo State, Brazil
Microbial diversity studies have remarkable relevance since the knowledge about the microbiology of process can improve plants and system efficiency. This work assessed microbial activity, specially methanogenic, at anaerobic pond for domestic wastewater treatment in the city of Cajati, São Paulo State, Brazil. Poliphasic taxonomy was adopted in onder to co
Publicado em: 2007
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23. COMUNIDADE ZOOPLANCTÔNICA DE CINCO RESERVATÓRIOS TROPICAIS DO SISTEMA FURNAS S.A. (BRASIL): ABUNDÂNCIA E BIOMASSA EM CARBONO / COMUNIDADE ZOOPLANCTÔNICA DE CINCO RESERVATÓRIOS TROPICAIS DO SISTEMA FURNAS S.A. (BRASIL): ABUNDÂNCIA E BIOMASSA EM CARBONO
Gases generation, as contributor to the greenhouse, inside reservoirs it is one of the possible impacts caused for these systems to environment. Inside reservoirs, the zooplankton community had constituted one source of carbon so that this community would be also under influence of other physical, chemical and biological factors associated with morphometric
Publicado em: 2007
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24. Utilização de fertilizantes orgânicos para indução de alimento natural no cultivo do camarão nativo Farfantepenaeus subtilis (Pérez-Farfante, 1967).
The marine shrimp Farfantepenaeus subtilis has a high potential for the aquaculture. However there are some feeding and nutrition problems in captivity, resulting in low growth and high feed conversion ratio. This work aimed to evaluate the natural food induction in F. subtilis culture, through different fertilization regimes. Were adopted four treatments an
Publicado em: 2006