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| Registros recuperados: 235 | |
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| ALMEIDA,C. E.; RAMOS,E. F.; GOUVÊA,E.; CARMO-SILVA,M. do; COSTA,J.. |
| Ctenus medius Keyserling, 1891 is a common species in several spots of Mata Atlântica, however there is a great lack of studies in all aspects of its natural history. This work aims to elucidate aspects of ecotope preference compared to large spiders, and to provide data on the development of chromatic patterns during its life cycle. The observations on the behavior of C. medius were done in the campus of Centro Universitário de Barra Mansa (UBM) by means of observations and nocturnal collections using cap lamps. For observations on the development of chromatic patterns, spiderlings raised in laboratory, hatched from an oviposition of a female from campus of UBM, and others spiderlings collected in field were used. The field observations indicate that: C.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ctenus medius; Ctenidae; Natural history. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000300015 |
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| OLIVEIRA,A. E. A.; GOMES,V. M.; SALES,M. P.; FERNANDES,K. V. S.; CARLINI,C. R.; XAVIER-FILHO,J.. |
| Protein fractions obtained from seeds of the jack bean (Canavalia ensiformis) as well as the amino acid canavanine, present in these seeds, were tested for their capacity to inhibit the growth of the phytopathogenic fungi Macrophomina phaseolina, Colletotrichum gloesporioides, Sclerotium rolfsii and Fusarium oxysporum. We found that most of the proteins examined and also canavanine did not have any effect on the growth of these fungi. On the other hand the toxic protein canatoxin was found to be effective, at a concentration of 2%, in the inhibition of the growth of M. phaseolina, C. gloesporioides and S. rolfsii. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Canavalia ensiformis; Jack bean seeds; Canatoxin; Phytopathogenic fungi. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000100008 |
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| PIRATELLI,A. J.; PIÑA-RODRIGUES,F. C. M.; GANDARA,F. B.; SANTOS,E. M. G.; COSTA,L. G. S.. |
| A biologia da polinização de Jacaratia spinosa (Aubl) ADC. (Caricaceae) foi estudada na Mata de Santa Genebra, Campinas (20º54'S; 47º05'W), estado de São Paulo, Brasil. Foram obtidos dados de antese floral, volume e concentração de açúcar no néctar, viabilidade do pólen, receptividade do estigma, localização de glândulas de odor, sistemas de reprodução e principais visitantes/potenciais polinizadores. A espécie é dióica e as plantas masculinas florescem por um período maior (52 dias) que as femininas (22 dias). A maioria das flores tem antese noturna, durando as masculinas cerca de 24 horas e as femininas, 48 horas. As masculinas produzem, em média, 112,5 ml de néctar e concentração de açúcar de 13,9%. As femininas não produzem néctar, tendo sido... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caricaceae; Dioicismo; Jacaratia; Polinização. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081998000400015 |
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| APOLINÁRIO,M.. |
| The community structure in and around two barnacle (Chthamalus challengeri Hoek) patches (sites A and B) which extended from the middle to the upper intertidal zone on a pebbly shore in Magarisaki (Amakusa, Kyushu, Japan), was studied during summer and winter of 1995 and 1996. The results show a significant decrease in the proportion of substrate covered by barnacles from January 1995 to July 1996. The number of species, number of individuals, and biomass also decreased in the patch areas through time. There were significant differences between inside and outside the patches for percentage of substrate covered by barnacles, number of individuals, number of species, and biomass during the first year. Numbers of some gastropods were significantly higher in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Barnacles; Chthamalus challengeri; Community structure; Intertidal; Japan. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000100006 |
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| SOPHIA,M. G.. |
| Pela arrumação de suas folhas as bromeliáceas permitem a retenção de água nos imbricamentos das mesmas, onde é possível o desenvolvimento de uma ficoflórula associada aos fitotelmatas (tanques de bromélias). Nestes ambientes, foram coletadas ao acaso vinte e cinco amostras através do Estado do Rio de Janeiro. Deste total, dezenove continham representantes de desmídias. A flora fitotélmica de desmídias esteve representada por quatorze táxons, tendo sido identificadas dez espécies, três variedades e uma forma taxonômica. Além do predomínio das Zygnemaphyceae, foram também registradas outras cinco classes de algas neste tipo de ambiente: Chlorophyceae, Cyanophyceae, Bacillariophyceae, Xanthophyceae e Dinophyceae. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Algas; Desmídias; Fitotelmo; Sudeste do Brasil. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000100018 |
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| CYRINO,J. E. P.; MULVANEY,D.R.. |
| Biossays were performed to assess the effects of different levels of growth medium supplementation with fetal bovine serum (FBS), fish fry extract (FE), combinations of FBS and FE, and addition of insulin-like growth factor I (IGF-I) and fibroblast growth factor (FGF) on the proliferation of brown bullhead catfish cells (BB line). Treatments (n = 4) were: 2.5, 5, 10, and 15.0% FBS or FE and 5/2.5, 5/5, 10/2.5, and 10/5 of a FBS/FE combination as supplement to the growth medium, or the addition of 0.1, 1, 2.5, 10, 25, and 75 ng/ml of either IGF-I or FGF to the growth media. Initial cell density was 1.1 x 10(6) cells per well on uncoated 24-well plates. Incubation temperature was 29.5 ± 0.7ºC. Six hours after plating, initial culture medium was removed,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mitogenic activity; Growth factors; Catfish; BB cell line. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000300017 |
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| NOGUEIRA,I. de S.; LEANDRO-RODRIGUES,N. C.. |
| Este trabalho visa estudar a composição e fazer algumas considerações ecológicas das algas planctônicas que ocorrem em um dos lagos artificiais do Jardim Botânico Chico Mendes, Goiânia, Goiás, enfocando a florística e aspectos ecológicos entre períodos de seca, início de chuva e período chuvoso, juntamente com alguns parâmetros abióticos (pH, oxigênio - dissolvido e saturado - temperatura do ar e da água, nitratos, nitritos, alcalinidade, cloretos, turbidez, DBO e precipitação). Foram reconhecidos 77 táxons, distribuídos em 9 classes, destes 68,7% foram registrados como sendo primeira ocorrência para o estado e Chlorophyceae, a classe mais representativa. Durante o período chuvoso observou-se maior riqueza específica, com 11 táxons abundantes. No entanto,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fitoplâncton; Florística; Aspectos ecológicos; Lago artificial. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000300003 |
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| d'ALMEIDA,J. M.; ALMEIDA,J. R.. |
| Foram calculadas a extensão e sobreposição de nichos tróficos de dípteros caliptrados, criados em variados ambientes do Rio de Janeiro (área rural, urbana e florestal), utilizando-se diferentes substratos de criação (banana amassada, carcaça de camundongo, peixe (sardinha), fígado bovino, camarão e fezes humanas frescas. Foram criadas 14.294 moscas, pertencentes às famílias Calliphoridae, Fanniidae, Muscidae e Sarcophagidae. As maiores sobreposições de nichos tróficos, entre as espécies, foram assim constatadas: área rural: Phaenicia cuprina versus Chrysomya megacephala; área urbana: Phaenicia eximia versus Sarcodexia innota e P. eximia versus Synthesiomyia nudiseta; área florestal: P. eximia versus Hemilucilia flavifacies. Na área rural, o nicho mais... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Moscas; Extensão de nichos; Sobreposição de nichos. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081998000400004 |
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| RAGUSA-NETTO,J.. |
| Bird mixed flocks including Cypsnagra hirundinacea and Neothraupis fasciata as species with sentinels were studied in "campo-cerrado" in order to investigate the possible relationship between alertness and the mixed flock leadership. This study was conducted from March to September 1996 and mixed flocks were observed on average for 2:30h. The time with sentinels were recorded for C. hirundinacea and N. fasciata. The sentinels of Cypsnagra hirundinacea performed most of the vigilance (time with sentinel was on average 42 ± 17%, 41 ± 17% of which by C. hirundinacea, whereas only 1.2 % by N. fasciata) and gave all the alarm calls recorded (54% of the encounters with raptors stimulated alarm calls). A relationship was verified between time with sentinel and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mixed flock; Sentinel; Thraupinae; Raptors; Nuclear species. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000300011 |
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| RAMOS,R. M. A.; DI BENEDITTO,A. P. M.; LIMA,N. R. W.. |
| The relationship between dental morphology, sex, body length and age of small cetaceans can be used to determine ontogeny, sexual dimorphism and geographical variation. The objective of this study was to determine the relationship between dental morphology, sex, body size and age. A total of 91 specimens of P. blainvillei and 80 specimens of S. fluviatilis accidentally captured in fisheries or stranded in northern Rio de Janeiro (21º37'-22º25'S), from September 1988 to November 1996 were analysed. The teeth root diameter in P. blainvillei was significantly different between the sex; the values for females were larger than males. In neither species aid we observed significant in variations dimension and number of teeth, thickness of dentine and cemental... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pontoporia blainvillei; Sotalia fluviatilis; Dental morphology; Age; Small cetaceans. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000200012 |
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| BOËCHAT,I. G.; GIANI,A.. |
| Sestonic biochemical composition (lipids, proteins and carbohydrates) may change with varying environmental fluctuations. These changes and the effects in the nutritional status of algae consists of an actual increasing source of interest. The aims of this work were to establish the relationship between biochemical composition of seston and 1) a range of physical, chemical and climatological factors, and 2) the natural fluctuation in the species composition in phytoplankton assemblages of the Pampulha Reservoir, an urban eutrophic lake located in Belo Horizonte, MG. Seasonal changes in the biochemical composition were observed in this study. None of the considered abiotic factors alone seem to affect the biochemical composition. So the effects could only... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biochemical composition; Seston; Seasonality. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000100009 |
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| STEINER,A. A.; PETENUSCI,S. O.; BRENTEGANI,L. G.; BRANCO,L. G. S.. |
| Several species of terrestrially hibernating frogs, turtles and insects have developed mechanisms, such as increased plasma glucose, anti-freeze proteins and antioxidant enzymes that resist to freezing, for survival at subzero temperatures. In the present study, we assessed the importance of glucose to cryoresistance of two anuran amphibians: the frog Rana catesbeiana and the toad Bufo paracnemis. Both animals were exposed to -2ºC for measurements of plasma glucose levels, liver and muscle glycogen content, haematocrit and red blood cell volume. Frogs survived cold exposure but toads did not. Blood glucose concentration increased from 40.35 ± 7.25 to 131.87 ± 20.72 mg/dl (P < 0.01) when the frogs were transferred from 20 to -2ºC. Glucose accumulation in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bufo paracnemis; Rana catesbeiana; Freeze tolerance; Cryopreservation; Glucose. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000200017 |
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| ALBERTO,R. M. F.; FONTOURA,N. F.. |
| Analisou-se a distribuição espacial e a estrutura da população do caranguejo-fantasma Ocypode quadrata (Fabricius, 1787), habitante da praia de Pinhal, no litoral do Rio Grande do Sul, no período de novembro de 91 a dezembro de 93. Para a análise da distribuição etária, utilizou-se o censo indireto, baseando-se em medidas aleatórias dos diâmetros das tocas. Constatou-se a existência de 2 grupos etários distintos, com possibilidade de um terceiro grupo. A longevidade foi estimada em até 3 anos. Para as relações diâmetro de toca/largura do cefalotórax, comprimento/largura e peso/largura, foram tomadas amostras de animais, utilizando-se técnicas de escavação e uso de armadilhas específicas. As equações que descrevem estas relações são, respectivamente, DT =... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ocypode quadrata; Caranguejo-fantasma; Estrutura populacional; Tocas. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000100013 |
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| BAPTISTA,D. F.; DORVILLÉ,L. F. M.; BUSS,D. F.; NESSIAMIAN,J. L.. |
| The distribution and abundance of aquatic insects were studied in the longitudinal gradient of the watershed of Macaé River, a coastal Atlantic Forest river in South-eastern Brazil. Sampling stations were selected in the first, second, fourth, fifth, and sixth orders and sampled in April, July, and October 1995. This represented the end of the rainy season, the dry season, and the beginning of another rainy season, respectively. In each month four samples were collected using a Surber sampler from each of the following substrates: sand, litter deposited in pool areas, litter in riffle areas, and stones. A total of 46,431 specimens of aquatic insects belonging to ten orders were obtained. The data were analyzed by the multivariate methodologies of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquatic insect; Longitudinal gradient; Tropical river; Multivariate analysis. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000200012 |
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| Registros recuperados: 235 | |
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