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SciELO - Scientific Electronic Library Online (52,375 recursos)
SciELO (Scientific Electronic Library Online) is an electronic library covering a selected collection of Brazilian scientific journals. The objective of the site is to implement an electronic virtual library, providing full access to a collection of serial titles, a collection of issues from individual serial titles, as well as to the full text of articles. The project envisages the development of a common methodology for the preparation, storage, dissemination and evaluation of scientific literature in electronic format.

Mostrando recursos 121 - 140 de 236

121. Factors affecting biochemical composition of seston in an eutrophic reservoir (Pampulha Reservoir, Belo Horizonte, MG - BOËCHAT,I. G.; GIANI,A.
Sestonic biochemical composition (lipids, proteins and carbohydrates) may change with varying environmental fluctuations.

122. Variation and life strategies of the Trichoptera (Insecta) larvae community in a first order tributary of the Paquequer River, Southeastern Brazil - HUAMANTINCO,A. A.; NESSIMIAN,J. L.
Quantitative samples of litter from pools, litter from riffles, sand, and stones were taken on each season from February 1991 to February 1992.The life cycles of common genera were categorized into three groups of biological strategies.

123. 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) - CAMARGO,A. F. M.; FLORENTINO,E. R.
This species presents, in the studied area, a broad seasonal variation of biomass.

124. Dental development and ontogenetic diet shifts of Roeboides paranensis Pignalberi (Osteichthyes, Characinae) in pools of the Upper Rio Paraná floodplain (State of Paraná, Brazil) - HAHN,N. S.; PAVANELLI,C. S.; OKADA,E. K.
Specimens of Roeboides paranensis were taken monthly from March 1992 through February 1993 in five pools of the upper Rio Paraná floodplain and in one site in the Rio Paraná itself, with the aim of relating the dental development to ontogenetic diet shifts.

125. Comparative study of the zooplankton composition of six lacustrine ecosystems in Central Brazil during the dry season - STARLING,F. L. do R. M.
The highest number of zooplankton species was recorded in oligotrophic Bonita Pond (32 species) and the lowest number in hypertrophic waste stabilisation ponds (7 species).

126. Growth of Nile tilapia Oreochromis niloticus fed with different levels of alcohol yeast - MEDRI,V.; PEREIRA,G. V.; LEONHARDT,J. H.
The effect of the substitution of 10%, 20% and 30% of the ration by distillery yeast (Saccharomiyces cerevisae) in balanced experimental rations on the development in the breeding of tilapias did not show a harmful effect up to the maximum tested level of 30%, showing that the choice of the yeast in the ration for these fishes depends on the availability and occasional cost.

127. Antennal malformations in light ocelli drones of Apis mellifera (Hymenoptera, Apidae) - CHAUD-NETTO,J.
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.

128. Reproductive phenological patterns of cerrado plant species at the Pé-de-Gigante Reserve (Santa Rita do Passa Quatro, SP, Brazil): a comparison between the herbaceous and woody floras - BATALHA,M. A.; MANTOVANI,W.
From September 1995 to February 1997, a floristic survey was carried out, when all vascular plant species at reproductive stage were collected.

129. Variação da biomassa aérea de Allagoptera arenaria (Gomes) O. Kuntze (Arecaceae) em uma comunidade arbustiva de Palmae na restinga de Marambaia, RJ - MENEZES,L. F. T. de; ARAUJO,D. S. D. de
A variação da biomassa aérea de Allagoptera arenaria (Gomes) O.

130. Patterns of gall-forming in Ossaea confertiflora (Melastomataceae) by Lopesia brasiliensis (Diptera: Cecidomyiidae) in an area of Atlantic Rainforest in Southeastern Brazil - VRCIBRADIC,D.; ROCHA,C. F. D.; MONTEIRO,R. F.
Out of the 81 plants surveyed, 55 (67.9%) bore galls.

131. Histology of the trachea and lung of Siphonops annulatus (Amphibia, Gymnophiona) - KUEHNE,B.; JUNQUEIRA,L. C. U.
The trachea is constituted mainly by incomplete cartilage rings lined by a respiratory epithelium (ciliated and mucous cells) with variable morphology according to the region observed.

132. Biology of Corecoris dentiventris Berg, 1884 (Hemiptera, Coreidae) in tobacco culture (Nicotiana tabacum) - CALDAS,B.-H. C.; REDAELLI,L. R.; DIEFENBACH,L. M. G.
The average incubation period was 13.7 ± 0.04 days and the egg viability, 99.63%.

133. Spatial heterogeneity of the Tucuruí Reservoir (State of Pará, Amazonia, Brazil) and the distribution of zooplanktonic species - ESPÍNDOLA,E. L. G.; MATSUMURA-TUNDISI,T.; RIETZLER,A. C.; TUNDISI,J. G.
With the purpose of analyzing the horizontal distribution of the zooplankton community of the Tucuruí Reservoir in the State of Pará, Brazil, collections were made at 16 stations during August 1988.

134. Competição larval em Chrysomya megacephala (F.) (Diptera: Calliphoridae): efeitos de diferentes níveis de agregação larval sobre estimativas de peso, fecundidade e investimento reprodutivo - VON ZUBEN,C. J.; STANGENHAUS,G.; GODOY,W. A. C.
Em insetos que se utilizam de substratos discretos e efêmeros para a alimentação e postura de ovos, o resultado da competição larval por alimento depende da quantidade de recursos e da distribuição espacial dos imaturos nos substratos alimentares.

135. Electrofishing as a sampling technique for coastal stream fish populations and communities in the Southeast of Brazil - MAZZONI,R.; FENERICH-VERANI,N.; CARAMASCHI,E. P.
Seven field trips, between July/94 and July/95, were done in 5 localities of the Ubatiba fluvial system (Maricá, RJ).

136. Effect of the infestation by Lernaea cyprinacea Linnaeus, 1758 (Copepoda, Lernaeidae) on the leucocytes of Schizodon intermedius Garavello & Britski, 1990 (Osteichthyes, Anostomidae) - SILVA-SOUZA,A. T.; ALMEIDA,S. C.; MACHADO,P. M.
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).

137. Reproductive behavior and seasonal occurrence of Psecas viridipurpureus (Salticidae, Araneae) - ROSSA-FERES,D. de C.; ROMERO,G. Q.; GONÇALVES-DE- FREITAS,E.; FERES,R. J. F.
The reproductive behavior and the seasonal occurrence of Psecas viridipurpureus were studied at the Estação Ecológica do Noroeste Paulista, a small conservation area in the northwest region of São Paulo State, Brazil (49°22'50''W and 20°48'36''S).

138. Uptake rates of nitrogen and phosphorus in the water by Eichhornia crassipes and Salvinia auriculata - PETRUCIO,M. M.; ESTEVES,F. A.
The main goal of this research was to survey information about the physiology of Eichhornia crassipes and Salvinia auriculata and their capacity to remove nitrogen and phosphorus from the environment, after quantifying the concentrations of the nitrogen (NO3-N, NH4-N and total-N) and phosphorus (PO4-P and total-P) compounds in the water.

139. Conservation value of a native forest fragment in a region of extensive agriculture - CHIARELLO,A. G.
Twenty mammal species were confirmed in the area (except bats and small mammals), including rare or endangered species, such as the mountain lion (Puma concolor), the maned wolf (Chrysocyon brachyurus), and the ocelot (Leopardus pardalis).

140. Ventilatory flow relative to intrabuccal and intraopercular volumes in the serrasalmid fish Piaractus mesopotamicus during normoxia and exposed to graded hypoxia - KALININ,A. L.; SEVERI,W.; GUERRA,C. D. R.; COSTA,M. J.; RANTIN,F. T.
Ventilation volume (a08vg.gif (265 bytes) – mlH2O.min–1 ), respiratory frequency (fR – breaths.min–1) and tidal volume (V T – mlH2O.breath–1 ) were measured in a group of Piaractus mesopotamicus (650.4 ± 204.7 g; n = 10) during normoxia and in response to graded hypoxia.

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