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	Provedor de dados BJB (235) Autor MANTOVANI,W. (6) MARTINS,M. L. (5) BARBOSA,F. A. R. (4) ESTEVES,F. A. (4) ROCHA,C. F. D. (4) TABARELLI,M. (4) TEIXEIRA,R. L. (4) APOLINÁRIO,M. (3) CALLISTO,M. (3) FERNANDES,M. N. (3) NEGREIROS-FRANSOZO,M. L. (3) ONIKI,Y. (3) RANTIN,F. T. (3) WILLIS,E. O. (3) AGOSTINHO,A. A. (2) ALMEIDA,J. R. de (2) ANDRADE,P. M. (2) APRILE,F. M. (2) ARAÚJO,F. G. (2) BAIDER,C. (2) Mais... Palavra-chave Brazil (14) Cerrado (5) Fitoplâncton (5) Reproduction (5) Atlantic Forest (4) Diet (4) Diversity (4) Estuary (4) Floodplain (4) Zooplankton (4) Conservação (3) Mammals (3) Paraná River (3) Parental care (3) Pollution (3) Reservoir (3) Restinga (3) Stingless bees (3) Sudeste do Brasil (3) Taxonomy (3) Mais... Tipo do documento Info:eu-repo/semantics/article (227) Info:eu-repo/semantics/other (7) Info:eu-repo/semantics/report (1) Ano 2001 (39) 2000 (84) 1999 (75) 1998 (37) País Brazil (235) Idioma Inglês (175) Português (57) Espanhol (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 235 Primeira ... 3 4 5 6 7 8 9 10 11 ... Última Structural indexes and sexual maturity of tambaqui Colossoma macropomum (cuvier, 1818) (Characiformes: Characidae) in Central Amazon, Brazil BJB VILLACORTA-CORREA,M. A.; SAINT-PAUL,U.. Length, weight, structural index and sexual maturity in tambaqui Colossoma macropomum were analysed. 449 specimens were obtained from the commercial fishing fleet arriving at Manaus Harbour from the floodplain areas from May 1992 to July 1993. The objective of this study is to describe changes in structural index during one hidrological cycle and to interpret them according to the water level fluctuations and to also determine the time, reproductive period and length in sexual maturity. Sex ratio in tambaqui was 1:1 however, the length of females was significantly longer than males'. Length/weight relationship was described by the expression: Pt = 0.00058*Cp2.9039. b value was significantly different from 3 which meant an alometric growth. Lower condition... Tipo: Info:eu-repo/semantics/article Palavras-chave: Colossoma macropomum; Floodplains; Structural index; Reproduction; Sexual maturity. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000400013 Seleção de hábitat em duas espécies de jararaca (Bothrops moojeni Hoge e B. neuwiedi Wagler) (Serpentes, Viperidae) BJB BORGES,R. C.; ARAUJO,A. F. B.. Foram utilizados dados relativos ao uso de hábitat por espécimes de Bothrops moojeni e B. neuwiedi (Serpentes, Viperidae) provenientes de doações ao Jardim Zoológico de Brasília, Universidade de Brasília, Jardim Botânico do Distrito Federal e de um experimento de semicativeiro. Os resultados indicaram forte segregação de hábitat entre ambas as espécies, sendo B. neuwiedi amplamente restrita a áreas abertas, enquanto B. moojeni utiliza principalmente a mata e o ecótono. Não foi encontrada diferença significativa na seleção de hábitat entre indivíduos mantidos isolados e aqueles confinados em um mesmo cercado. Assim, aparentemente, uma espécie não interfere diretamente na seleção de hábitat da outra. Tipo: Info:eu-repo/semantics/article Palavras-chave: Serpentes; Viperidae; Bothrops; Jararaca; Seleção de hábitat; Cerrado; Semi-cativeiro. Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081998000400006 Pollen spectrum of honey of "uruçu" bee (Melipona scutellaris Latreille, 1811) BJB CARVALHO,C. A. L. de; MORETI,A. C. de C. C.; MARCHINI,L. C.; ALVES,R. M. de O.; OLIVEIRA,P. C. F. de. In spite of the importance of the "uruçu" bee as honey producer of excellent quality, as well, potential pollinator both in agricultural and natural ecosystems, mainly in North-eastern Brazil, just some information is found in literature about sources that such bees utilize to collect nectar and pollen. The identification of the plants visited by Melipona scutellaris was accomplished with base on the analysis of pollen types found in the honey samples collected every two months, from March 1997 to February 1998, in 15 colonies located in Catu, State of Bahia, Brazil (12°21'00"S, 38°22'40"W, 76 m of altitude). Qualitative and quantitative analysis of the pollen types were carried out determining the percentage and occurrence classes. Twenty-eight pollen... Tipo: Info:eu-repo/semantics/article Palavras-chave: Pollen; Honey; Bee plants; Meliponinae. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000100009 Abundance of cladocerans in the littoral regions of two environments of the Upper Paraná River floodplain, Mato Grosso do Sul, Brazil BJB ROSSA,D. C.; LANSAC-TÔHA,F. A.; BONECKER,C. C.; VELHO,L. F. M.. The abundance of cladocerans recorded in plankton samples from the littoral regions of two enviroments (Baía River and Guaraná lake), the Upper Paraná River floodplain and some limnological variables important in controlling their abundance were investigated at three sites in the lake and two in the river, from March/93 to January/94. Abundance was highest in the lake, chiefly during high water. Bosminidae dominated in both environments and hydrological periods (high and low water). Chydoridae were more important in the lake, and Sididae in the river. A higher number of Pearson's correlations significative (p < 0.03) between the densities of the ten most important species and the limnological variables was observed in the river. This suggests that... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cladocerans; Littoral; Floodplain; Tropical. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000100007 Larvae and post-larvae of Penaeidae and Palaemonidae in coastal lagoons of the North of Rio de Janeiro (Macaé, RJ) BJB ALBERTONI,E. F.; PALMA-SILVA,C.; ESTEVES,F. A.. The northern part of the state of Rio de Janeiro shelters many coastal lagoons, located, mostly, in the "restinga" strip that stretches from the municipality of Macaé to the municipality of Quissamã. During 1995 and 1996 samplings were made aiming to verify the diversity and density of Natantia larvae in the Imboassica, Cabiúnas and Comprida lagoons. The monthly samples were taken with a 500 µ net, in horizontal drags from a boat. In Comprida lagoon no larvae of any family of these crustaceans were found. In Cabiúnas lagoon, the autumn was the season of the year with greatest relative abundance, the larvae belonging to only one genus: Macrobrachium. In Imboassica Lagoon samples were taken in two situations related to the variation of the water level and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coastal lagoons; Larvae; Penaeidae; Palaemonidae; Crustacea; Distribution. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000100014 The kariotype of the parasitoid Chelonus insularis Cresson (Hymenoptera, Braconidae, Cheloninae) BJB SILVA-JUNIOR,J. C.; POMPOLO,S. das G.; CAMPOS,L. A. de O.; CRUZ,I.. The karyotype of Chelonus insularis (Hymenoptera, Braconidae, Cheloninae) is described. The males show an haploid number of seven chromosomes and the females a diploid number of fourteen chromosomes, confirming haplo-diploid sex determination. Comparisons of these results with karyotypes of other species of the same family were done and a possible mechanism involved in the karyotype evolution of this species is discussed. Tipo: Info:eu-repo/semantics/article Palavras-chave: Cytogenetic; Chromosome and sex determination. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000200019 Changes in lactate dehydrogenase and malate dehydrogenase activities during hypoxia and after temperature acclimation in the armored fish, Rhinelepis strigosa (Siluriformes, Loricariidae) BJB PANEPUCCI,L.; FERNANDES,M. N.; SANCHES,J. R.; RANTIN,F. T.. Lactate (LDH) and malate dehydrogenase (MDH) of white skeletal muscle of fishes acclimated to 20, 25 and 30°C and thereafter submitted to hypoxia were studied in different substrate concentrations. Significant differences for LDH and MDH of white muscle enzyme activities are described here for the first time in Rhinelepis strigosa of fishes acclimated to 20°C and submitted to hypoxia for six hours. LDH presented a significant decrease in enzyme affinity for pyruvate in acute hypoxia, for fishes acclimated to 20°C and an increase for fishes acclimated to 30°C. Tipo: Info:eu-repo/semantics/article Palavras-chave: Hypoxia; Acclimation temperature; Lactate dehydrogenase; Malate dehydrogenase; Armored fish; Rhinelepis strigosa. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000200021 Diet of the colubrid snake, Thamnodynastes strigatus (Günther, 1858) from Paraná State, Brazil, with field notes on anuran predation BJB BERNARDE,P. S.; MOURA-LEITE,J. C.; MACHADO,R. A.; KOKOBUM,M. N. C.. Dissection of 44 specimens of the colubrid snake Thamnodynastes strigatus (Serpentes: Colubridae) provided data on food habits. Prey items include frogs (71.4% of the sample), rodents (14.3%), fishes (10.7%), and lizards (3.6%). The most of the anuran species recorded (Bufo sp., Leptodactylus sp., Physalaemus cuvieri and Scinax fuscovarius) are ground dwellers or call at the water level. Field observations provided information on the feeding behavior. Tipo: Info:eu-repo/semantics/article Palavras-chave: Serpentes; Colubridae; Thamnodynastes strigatus; Diet; Anuran predation. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000400022 Population dynamics and net primary production of the aquatic macrophite Nymphaea rudgeana C. F. Mey in a lotic environment of the Itanhaém River basin (SP, Brazil) BJB CAMARGO,A. F. M.; FLORENTINO,E. R.. In this paper we evaluated the population dynamics and obtained estimates of the net primary production of the aquatic macrophyte Nymphaea rudgeana in an arm of the Itanhaém River (São Paulo State, Brazil). This species presents, in the studied area, a broad seasonal variation of biomass. As from November (13.1 g DW/m²) we observed a gradual increase of biomass that reached a maximum in February (163.1 g DW/m²). Then, the biomass decreased, maintaining low levels until a new growth period. The reduction of biomass is associated to the development of floating aquatic macrophytes (Pistia stratiotes and Salvinia molesta) and, subsequently to environmental factors (higher salinity values) that are unfavorable to their development. The net primary production of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquatic macrophyte; Nymphaea rudgeana; Population dynamics; Net primary production; Brazil. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000100011 Feeding habits of Chaoboridae larvae in a tropical Brazilian reservoir BJB ARCIFA,M. S.. The diet of the four larval instars of a Chaoboridae species of Lake Monte Alegre, was evaluated through the analysis of the crop content of individuals caught at night in the lake. Peridinium and zooflagellates were the major components of the diet of instars I and II, whereas microcrustaceans, especially the cladoceran Bosmina, were most important for late instars. When the preferential prey decreased, in the course of the year, the diet was more diversified, increasing the ingestion of Peridinium by instars III and IV. There is a relationship between the mouth diameter of the larvae and the maximum width, height, or diameter of the ingested organisms. Tipo: Info:eu-repo/semantics/article Palavras-chave: Chaoboridae; Four instars; Diet; Zooplankton; Omnivory. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000400008 Characterization of the larval stages of Alphitobius diaperinus (Panzer) (Coleoptera: Tenebrionidae) using head capsule width BJB FRANCISCO,O.; PRADO,A. P. do. The mean width (n = 5) of the cephalic capsule instar of Alphitobius diaperinus was determined. The larvae were reared at 27ºC (± 0.1ºC). The result showed that A. diaperinus has eight larval instars. The head capsule of the 1st instar larvae measured x = 0.228 (SD = 0.0192) and the last instar larval measured x = 1.339 (SD = 0.0436). The developmental rate, determined by Dyar-Hutchinson's rule, was 1.29. These data may be useful for studies on phenology and age structure of A. diaperinus in the field. Tipo: Info:eu-repo/semantics/article Palavras-chave: Lesser mealworm; Larval instars; Cephalic capsule; Caged layer manure. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000100016 Short-term changes and longitudinal distribution of carbon metabolism in the Piauí River estuary (Sergipe, Brazil) BJB SOUZA,M. F. L. de; COUTO,E. C. G.. Net pelagic metabolism (NPM) and net ecosystem metabolism (NEM) were assessed by sigmaCO2 changes in three sampling stations along Piauí River estuary. At the upper estuary station, sampling was carried out over 48 h. Samples exhibited high DIN:DIP ratios. Chlorophyll-a ranged from 0.2 to 2.5 mug.l-1, being higher at the upper estuarine station than marine ones. Net pelagic metabolic rates ranged from -13.2 to 61.2 mgC.m7-2.d-1. Presence of mucilaginous algal material can explain the net mineralization. In the photic period, NPM ranged from-0.05 to 3.04 mgC.m-2h-1. NEM ranged from -7.77 to 6.65 mgC.m-2.d-1. Bottom ressuspension due to microphytobenthic flotation and a high turbidity plume inside de estuary reflected in negative metabolic rates... Tipo: Info:eu-repo/semantics/article Palavras-chave: Estuary; Short-term changes; Primary production; Mineralization; Microphytobenthos. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000200003 Variação da biomassa aérea de Allagoptera arenaria (Gomes) O. Kuntze (Arecaceae) em uma comunidade arbustiva de Palmae na restinga de Marambaia, RJ BJB MENEZES,L. F. T. de; ARAUJO,D. S. D. de. A variação da biomassa aérea de Allagoptera arenaria (Gomes) O. Kuntze (Arecaceae), ao longo de 5 perfis topográficos perpendiculares ao mar, foi analisada em uma comunidade arbustiva de Palmae, na restinga de Marambaia, RJ. Foi encontrada uma relação positiva e altamente significativa da biomassa aérea dessa espécie (F = 39,57; R² = 0,69; P < 0,01) e da cobertura de detritos (F = 525,92; R² = 0,92; P < 0,01) com o distanciamento do mar. O desenvolvimento de A. arenaria está intimamente relacionado com a variação topográfica da área de estudo. Densas populações de A. arenaria enriquecem o solo através do aumento de matéria orgânica sob sua cobertura proveniente de suas folhas senescentes e, conseqüentemente,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Biomassa; Allagoptera arenaria; Restinga; Rio de Janeiro. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000100017 Preliminar report on the presence of tegumentar glands in the thorax of Meliponinae bees (Hymenoptera, Apidae) BJB CRUZ-LANDIM,C.; REGINATO,R. D.. This is a first report on the presence of glandular cells in the lateral tegument of the mesothorax of Meliponinae bees. The cells are of the insect class III glandular cells and are present in queens, workers and males. The glands are more developed in queens than in workers, and in workers than in males. Tipo: Info:eu-repo/semantics/article Palavras-chave: Mesothorax; Glands; Tegument; Male; Worker; Queen. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000100021 Antennal malformations in light ocelli drones of Apis mellifera (Hymenoptera, Apidae) BJB CHAUD-NETTO,J.. Malformed antennae of Apis mellifera light ocelli drones were drawn, dissected and mounted permanently on slides containing Canada balsam, in order to count the olfactory discs present in each segment, in comparison with the number of those structures in normal antennae of their brothers. Some drones presented morphological abnormalities in a single segment of the right or left antenna, but others had two or more malformed segments in a same antenna. Drones with malformations in both antennae were also observed. The 4th and 5th flagellum segments were the most frequently affected. In a low number of cases the frequency of olfactory discs in malformed segments did not differ from that one recorded for normal segments. However, in most cases studied, the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Apidae; Apis mellifera; Drones; Antennal malformations; Olfactory discs. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000100015 Dynamics of some limnological characteristics in pacu (Piaractus mesopotamicus) culture tanks as function of handling BJB SIPAÚBA-TAVARES,L. H.; MORAES,M. A. G. de; BRAGA,F. M . de S.. In order to study the water quality in fish tanks, a 166-day (January to July 1992) experiment was realized using the indigenous species "pacu" (Piaractus mesopotamicus). Two different protein levels were tested in the diet (16% and 34% crude protein) and three stocking densities (0.25, 0.50 and 0.77 fish/m²). From the results, it was observed that the interactions between stocking density and experiment length affected the characteristics bicarbonate and alkalinity, as well as the interaction between stocking density and protein levels affected concentrations of free and total CO2, conductivity and pH (P < 0.05). The water temperature in tanks changed significantly during the period of study (P < 0.05),decreasing gradually from summer to winter.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Stock density; Protein levels; Fish tanks; Pacu; Limnological characteristics. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000400003 Seasonal variation of nutrients and energy in tambaqui's (Colossoma Macropomum Cuvier, 1818) natural food BJB SILVA,J. A. M. da; PEREIRA-FILHO,M.; OLIVEIRA-PEREIRA,M. I. de. The aim of this study was to evaluate the importance of fruits and seeds as food items in the natural diet of the tambaqui (Colossoma macropomum). During one year, tambaqui's stomach contents were collected, and their nutritional and energetic values were determined. During the flooding period, and while the river water was rising, which coincided with a high availability of fruits and seeds, the protein content of food was low (11%-15% of dry matter basis), whereas in the dry season, when tambaqui fed mainly zooplankton, there was a high protein content (45%-57% of dry matter basis). Lipid, carbohydrate, crude fiber, ash and gross energy contents of the diet varied depending on the river water level and the food items... Tipo: Info:eu-repo/semantics/article Palavras-chave: Tambaqui; Colossoma macropomum; Stomach content; Seasonal variation; Nutritional; Value. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000400009 Avifauna de quatro fisionomias florestais de pequeno tamanho (5-8 ha) no campus da UFLA BJB D'ANGELO NETO,SANTOS; VENTURIN,NELSON; OLIVEIRA FILHO,ARY T. DE; COSTA,FERNANDO A. FRIEIRO. Este trabalho foi realizado na área do campus da Universidade Federal de Lavras (UFLA), nas coordenadas de 21º13'40" sul e 44º57'50" oeste. Foi marcada uma trilha de cerca de 300 m de extensão em quatro fisionomias florestais encontradas no campus e, entre abril e novembro de 1995, foram visitados mensalmente estes locais, registrando o número de espécies e indivíduos ao longo da trilha, e também observados os padrões ecológicos de cada espécie, como forrageamento e estrato de mata ocupado. Com os dados coletados no levantamento quantitativo, foram calculados alguns parâmetros de abundância para cada local, a similaridade avifaunística entre eles e o índice de diversidade. Como resultado, foram registradas 107 espécies de... Tipo: Info:eu-repo/semantics/article Palavras-chave: Aves; Fragmentação; Perda de espécies. Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081998000300011 Effect of the infestation by Lernaea cyprinacea Linnaeus, 1758 (Copepoda, Lernaeidae) on the leucocytes of Schizodon intermedius Garavello &amp; Britski, 1990 (Osteichthyes, Anostomidae) BJB SILVA-SOUZA,A. T.; ALMEIDA,S. C.; MACHADO,P. M.. Differential white blood cell counts from Schizodon intermedius infested by Lernaea cyprinacea were carried out and compared using the Wilcoxon matched pairs test. The observations were performed in fish infested by 16-77 adult Lernaea, fish with parasitic lesions but without attached crustaceans, and non parasitized fish (control group). The specimens of Schizodon intermedius were obtained from the University of Londrina fish farming facilities. The following leucocytes were observed: lymphocytes, neutrophils, monocytes, basophils, eosinophils and immature leucocytes. Intense lymphocytopenia and neutrophilia were observed in the infested hosts. Consistent increasing of monocyte percentage values occurred in the infested fish. The highest values for... Tipo: Info:eu-repo/semantics/article Palavras-chave: Leucocytes; Lernaea cyprinacea; Schizodon intermedius; Lymphocytopenia; Neutrophilia. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000200004 Biology of nymphs of Rhodnius robustus Larrousse, 1927 (Hemiptera, Rreduviidae), fed on pigeon or on swiss mouse blood in laboratory conditions BJB BRAGA,M. V.; PRATA,K. C.; BRAZIL,R. P.. The duration of the life cycle of Rhodnius robustus Larrousse, 1927 as well as the mortality rate of each nymphal instar were studied comparing groups fed on pigeon or on mouse blood weekly or fortnightly. This species showed a better development and lower mortality rate when fed on swiss mouse. The intervals between feedings apparently did not have influence on the shortening of the cycle. We suggest that laboratory colonies and experiments with R. robustus are better maintained when these triatomines are fed on swiss mouse. Tipo: Info:eu-repo/semantics/article Palavras-chave: Rhodnius robustus; Biology; Life cycle; Feeding preference. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000100012 Registros recuperados: 235 Primeira ... 3 4 5 6 7 8 9 10 11 ... Última

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