Microcrustaceans
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. A mata ripária influencia a composição e estrutura da comunidade zooplanctônica de poças temporárias?
RESUMO Poças temporárias são importantes ampliadores da biodiversidade local, sobretudo em áreas florestadas estacionais. Alterações na cobertura vegetal ao longo das margens desses corpos hídricos podem alterar a composição e estrutura da sua comunidade zooplanctônica. Nesse sentindo, testamos a hipótese de que a presença de mata ripária altera
Iheringia, Sér. Zool.. Publicado em: 11/11/2019
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2. Can nearby eutrophic reservoirs sustain a differentiated biodiversity of planktonic microcrustaceans in a tropical semiarid basin?
ABSTRACT This paper aims to compare alpha and beta diversities of planktonic microcrustaceans from three reservoirs located nearby in a tropical semiarid basin. Our hypothesis was that alpha and beta diversities of the community are different, although the ecosystems are located close to each other. We carried out two sampling campaigns: dry and rainy season
An. Acad. Bras. Ciênc.. Publicado em: 2017-12
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3. Zooplankton capturing by Nile Tilapia, Oreochromis niloticus (Teleostei: Cichlidae) throughout post-larval development
ABSTRACT The Nile tilapia, Oreochromis niloticus (Linnaeus, 1758), uses filter feeding and visual predation to catch prey. In filter feeding, the mucus secreted in their gill rakers traps planktonic organisms. In visual predation, the fish spot and capture food, eating it directly. At different ontogenetic stages, the Nile tilapia may impact the zooplankton
Zoologia (Curitiba). Publicado em: 2015-12
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4. Crustáceos zooplâncton de águas continentais litorales na gradiente de altitude na região de Aysén (46 ° S, Patagônia Chile)
A Patagônia chilena apresenta numerosos tipos de ecossistemas aquáticos, como lagos, lagoas, pântanos e rios, os quais tem sido pouco estudados devido a dificuldades de acesso. Este estudo foi feito na região de Aysén, no sul do Chile, e inclui diferentes tipos de corpos d'água, tais como rios, córregos, lagos, lagoas e lagos distribuídos ao longo de
Braz. J. Biol.. Publicado em: 2014-02
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5. Water quality assessment in piracicamirim creek upstream and downstream a sugar and ethanol industry through toxicity tests with cladocerans
An environmental impact study was conducted to determine the Piracicamirim's creek water quality in order to assess the influence of effluents from a sugar industry in this water body. For this, toxicity tests were performed with a water sample upstream and downstream the industry using the microcrustaceans Daphnia magna, Ceriodaphnia dubia and Ceriodaphnia
Brazilian Archives of Biology and Technology. Publicado em: 2012-08
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6. Predation on microcrustaceans in evidence: the role of chaoborid larvae and fish in two shallow and small Neotropical reservoirs
This study was focused on the predation upon microcrustaceans by an invertebrate predator (chaoborid larvae), and vertebrate predators (fish), in two small reservoirs in southeastern Brazil, with and without macrophytes, in two climatic periods (dry and rainy seasons). Chaoborus larvae were sampled in the limnetic zone, as they are scarce in the littoral, an
Nauplius. Publicado em: 2012-06
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7. 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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8. Transposição e fragmentação do Rio Piumhi (Bacia do Rio São Francisco, MG): variáveis limnológicas e microcrustáceos zooplanctônicos da Lagoa dos Tropeiros
The aim of this study was to analyse the physical and chemical characteristics of Tropeiros Lake (Capitólio, MG), located in Piumhi river sub‐basin, a river diverted from the Rio Grande basin to the são Francisco River basin, and to analize the taxonomic composition, abundance, diversity and the size structure of the planktonic microcrustaceans. Phys
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/06/2011
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9. 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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10. Distribuição espacial e estrutura da comunidade de crustáceos de águas intersticiais de um igarapé amazônico e um riacho da mata atlântica / Spatial distribution and structure of interstitial water crustacean assemblages in an Amazonian stream and an Atlantic forest stream
The assemblages of the copepod fauna from interstitial waters in the hyporheic zones from a stream in Central Amazon and a stream in the Atlantic rainforest of southeastern Brazil were compared in terms of composition, diversity and organism distribution. The relation of the identified species with abiotic factors was analyzed, aiming at establishing which f
Publicado em: 2007
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11. Biomagnificação do heptacloro num modelo de simulação em condições ex-situ / Biomagnification of heptacloro in a model of simulation in former-situ conditions
The studies carried out in different parts of the world about the pesticides use and the impacts that they can cause to the environment, are one of the priority actions for the agriculture development, mainly for those pesticides that are persistents in the biotic and abiotic environment, such as the heptachlor insecticide, which is still illegally used for
Publicado em: 2006
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12. Analysis of distribution, density and toxicity of cyanobacterial blooms and its toxins in the reservoirs of Middle and Low Tietê river (SP) and its relation with limnological characteristics of this system / Análise da distribuição, densidade e toxicidade de florações de cianobactérias em reservatórios do médio e baixo rio Tietê (SP) e relação com as características limnológicas do sistema
Reservoirs in Brazil, particularly in São Paulo State, are important ecosystems which were built up successively in the last 40 years. Some of these reservoirs, mainly at the Middle and the Low Tietê river cascade system are eutrophic. Frequently cyanobacterial blooms are related to these eutrophic conditions which compromise the multiple use of the reserv
Publicado em: 2005