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| Registros recuperados: 22 | |
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| FIM,Jorge D. I.; HARDY,Elsa R.. |
| Os organismos zooplanctônicos desempenham um importante papel na alimentação de larvas e pós-larvas de peixes, tanto na natureza, como em cativeiro em tanques de piscicultura. No aspecto do cultivo de zooplâncton cm massa, somente conhecendo-se os valores de alguns parâmetros importantes do ciclo de vida de um único indivíduo, em situações diversas, é que se pode avaliar se este estará respondendo de maneira adequada, ou não, a determinado tratamento aplicado. O trabalho mostra uma adaptação de mamadeiras plásticas comerciais para a utilização no estudo individualizado de microcrustáceos zooplanctônicos (cladóceros), em laboratório (aquários), viveiros de piscicultura, ou ambientes naturais (lagos e igarapés). |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zooplâncton; Cladocera; Estudos "in situ"; Organismos-alimento; Piscicultura. |
| Ano: 1993 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671993000300245 |
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| Bessa, Gisele Fernandes; Universidade Federal do Tocantins; Vieira, Ludgero Cardoso Galli; Universidade de Brasília; Bini, Luis Mauricio; Universidade Federal do Goiás; Reis, Deusiano Florêncio dos; Universidade Federal do Tocantins; Morais, Paula Benevides de; Universidade Federal do Tocantins. |
| The goal of this study was to evaluate the concordance amongst three zooplankton groups (Rotifera, Cladocera, and Copepoda) and between the zooplankton groups and the environmental variables in the Luis Eduardo Magalhães reservoir, in the Mid-Tocantins River, Tocantins State, Brazil. Concordance patterns were found in relation to environmental variables, cladocerans, and rotifers, although values were relatively low. These results indicate that one should be cautious about the use of indicative taxonomic groups to detect environmental changes, where divergent results annul extrapolation possibilities and indicate the existence of distinct environmental factors controlling different groups. |
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Palavras-chave: 2.05.02.00-1 Concordance; Reservoir; Rotífera; Cladocera; Copepoda 2.05.02.00-1 Concordance; Reservoir; Rotífera; Cladocera; Copepoda. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/7336 |
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| MARTINEZ,GINGER. |
| Debido a que Cladocera es el grupo de microfiltradores más abundante del zooplancton límnico y cuyas poblaciones se encuentran usualmente limitadas por alimento, la respuesta de los individuos frente a un gradiente de concentración de recursos tendría significativas implicancias sobre los patrones poblacionales y comunitarios. Se comparó la conducta alimentaria de Moina micrura, Ceriodaphnia dubia y Daphnia ambigua (Cladocera) frente a las microalgas Chlorella sp. y Oocystis sp. (Chlorophyceae) mediante los siguientes parámetros: Tasa de Ingesta Máxima (Imax), Concentración Limitante Incipiente (CLI) y Eficiencia de Consumo (b), los cuales fueron obtenidos a través de un modelo de respuesta funcional. Los resultados mostraron que D. ambigua presentó las... |
| Tipo: Journal article |
Palavras-chave: Conducta alimentaria; CLI; Eficiencia de consumo; Microfiltradores; Cladocera. |
| Ano: 2000 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000100006 |
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| RAMOS-JILIBERTO,RODRIGO; CARVAJAL,JOSÉ L.; CARTER,MAURICIO; ZÚÑIGA,LUIS R.. |
| In this work we analyzed the depth-distribution, at noon and midnight, of three zooplankton populations which are common inhabitants of lakes from central Chile and coexist in lake El Plateado. The species were Tumeodiaptomus diabolicus, Diaphanosoma chilense and Bosmina longirostris. Also, we analyzed the association between the depth-specific abundances of the groups and the depth-specific temperature and oxygen values during the sampling period. Our results show that: (1) the three population exhibited diel vertical migration during part of the year; (2) T. diabolicus and D. chilense exhibited the normal pattern of vertical migration, and B. longirostris presented both the normal and the reverse pattern; (3) for all species and most dates, zooplankters... |
| Tipo: Journal article |
Palavras-chave: Depth-selection; Cladocera; Copepoda; Reverse vertical migration; Chile. |
| Ano: 2004 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2004000100004 |
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| Vignatti,Alicia María; Cabrera,Gabriela Cecilia; Echaniz,Santiago Andrés. |
| Moina macrocopa is common in eutrophic water bodies. Two subspecies have been described: M. macrocopa macrocopa (Straus, 1820), whose original distribution was restricted to the Old World, and M. macrocopa americanaGoulden, 1968, recorded only in North America. In 1994, the species was found in Bolivia, and in 1997 it was found in the northeast of Argentina. As the specimens belonged to M. macrocopa macrocopa in both cases, the authors suggested that it may have been introduced from the Old World by anthropogenic means. The aim of this study was to assess the distribution of M. macrocopa in La Pampa (Argentina), and provide information on its population characteristics under natural conditions. The species was recorded in six out of more than 100 water... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Argentina; Temporary lakes; Cladocera; Moina macrocopa; Invasive species. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000300086 |
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| Sousa,Francisco Diogo Rocha; Elmoor-Loureiro,Lourdes Maria Abdu. |
| Abstract Since early 2000 years, the knowledge about the taxonomy of Aloninae (Cladocera: Chydoridae) has been in rapid progress. For this reason, the most of Brazilian fauna was affected concerning nomenclature, besides an increase in the number of known genera and species. Thus, in this study, we bring an updated species list of Aloninae in Brazil, as well as identification keys based in current nomenclature and morphological standards. Our finding pointed to the occurrence of 46 valid species, belonging to 21 genera and three groups of Alona sensu lato. Two of these genera are endemic to Brazil. So far, South-East Asia and Brazil have the most well-studied Aloninae fauna in the entire planet. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cladocera; Microcrustaceans; Neotropics; Postabdome; Rostrum. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492019000100224 |
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| Sousa,Francisco Diogo Rocha; Elmoor-Loureiro,Lourdes Maria Abdu. |
| Abstract In recent years, an increase in knowledge about the diversity and biogeography of Brazilian Cladocera fauna has been evident. To keep up with these changes, it is opportune to carry out an update of the taxonomy and biogeography for the main cladoceran groups. Since 2008, some progress has been observed in Ilyocryptidae, with reports of four new taxa. In this study, an updated checklist of Ilyocryptidae from Brazil is provided, with a diagnosis for each cited taxon, as well as an identification key. Some of these taxa are considered rare; however, this issue might be an artifact of sampling. As this is the first in a series of papers compiling current information about Brazilian Cladocera, an identification key to orders and families occurring in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cladocera; Ctenopoda; Microcrustaceans; Postabdomen; Setae; Valves. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492019000100223 |
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| Pinese, Olívia Penatti; Universidade Federal de Goiás - UFG; Cassemiro, Fernanda Aparecida da Silva; Universidade de Brasília - UnB; Pinese, José Fernando; Universidade Federal de Uberlândia - UFU; Diniz-Filho, José Alexandre Felizola; Universidade Federal de Goiás - UFG. |
| Several ecological hypotheses try to explain geographical patterns in biodiversity. The Metabolic Theory of Ecology (MTE) predicts that temperature is the main determinant of richness patterns for ectothermic organisms and that the relationship between richness (lnS) and temperature (1/kT) is a linear relationship with angular coefficient (b) near -0.65. This study tested the MTE for continental zooplankton diversity in 63 lakes in Brazil. Copepoda, Cladocera and Rotifera, as well as the three groups combined, showed different patterns from that predicted by MTE, with b values equal to 0.871, 0.516, 0.720 and 0.901, respectively. Temperature explains 12.7% of the richness of Copepoda, 5.3% of Cladocera, 6.7% of Rotifera, and 11.4% of all zooplankton groups... |
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Palavras-chave: 2.05.00.00-9 macroecology; Biodiversity; Copepoda; Cladocera; Rotífera; Temperature gradients. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/9087 |
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| Marazzo,Andrea; Valentin,Jean Louis. |
| Populations of Pseudevadne tergestina were studied in Guanabara Bay, southeastern Brazil, to assess temporal variations in density and population dynamics. Data on temperature, salinity and zooplankton samples were taken from the superficial water of a fixed station, every 3 - 4 days, from February 2 through August 1, 2000. The highest abundance of this species was observed in March, when densities varied widely, from 20 to 600 ind. m-3. Population parameters were calculated, such as birth rate (from 0.25 to 0.90 ind.-1.day-1), growth rate (from -1.30 to 2.09 day-1 ) and death rate ( from -1.6 to 1.9 day-1 ) Start of population could be attributed to the increase of temperature and to the hatching of resting eggs. The population collapsed in fall-winter,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zooplankton; Cladocera; Population parameters; Temporal distribution; Guanabara bay; Brazil. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000500006 |
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| Castilho,Maria Carolina de A.; Wisniewski,Maria José dos S.; Wisniewski,Célio; Silva,Érika dos S.. |
| ABSTRACT Richness estimators (Jackknife 1, Bootstrap, Chao 1 and ACE) were used to relate zooplankton species richness with amount of water collected per sample and number of samples throughout the year for the limnetic region of Sapucai River compartment of Furnas reservoir, state of Minas Gerais, Brazil. Seven 100 L samples were collected in sequence using a motor pump, and seven 70 L samples were collected in sequence using a plankton net (68 μm mesh size) in vertical hauls, to totalize 450 L, in three stations of the reservoir. Twelve monthly samplings were carried out over a year. The assessment of richness was made by analyzing the asymptotic behavior of the estimator curves. The samplings reached the asymptote from 350 L of collection with trawls... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biodiversity; Cladocera; Rotifera; Sampling effort; Aquatic environments. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212016000100211 |
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| Registros recuperados: 22 | |
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