|
|
|
Registros recuperados: 235 | |
|
| |
|
| |
|
|
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 |
| |
|
|
HATANO,F. H.; VRCIBRADIC,D.; GALDINO,C. A. B.; CUNHA-BARROS,M.; ROCHA,C. F. D.; VAN SLUYS,M.. |
We analyzed the thermal ecology and activity patterns of the lizard community from the Restinga of Jurubatiba, Rio de Janeiro, Brazil. The broadest activity was that of Tropidurus torquatus, a sit-and-wait forager, while the active foraging teiid Cnemidophorus littoralis had the shortest activity. The nocturnal gekkonid Hemidactylus mabouia was found active during the day only during early morning and late afternoon, when environmental temperatures are low. Body temperature was highest for Cnemidophorus littoralis and lowest for the two Mabuya species. The patterns found here are discussed and compared to those of congeneric species in other habitats in Brazil. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thermal ecology; Lizard community; Activity patterns; Restinga habitat. |
Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000200011 |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
ESTEVES,K. E.; PINTO LÔBO,A. V.. |
Diet of 364 specimens of the dourado (Salminus maxillosus) was studied monthly at Cachoeira das Emas from November/1996 to May/1998, considered the breeding ground of this and other migrant fishes of Mogi-Guaçu River. Only adults were found at this site, and diet consisted exclusively of fish, with predominance of Leporinus sp. Seasonal variation in feeding activity was highest during some months of the rainy and hot season (September-December), when fish composition and number of prey species consumed also changed. These modifications were primarily attributed to an increase in food availability at the site of study during the rainy season, once most of the migrant species, including small Characidae concentrate there at this time of year. Apparently diet... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Salminus maxillosus; Feeding; Mogi-Guaçu River; Prey availability. |
Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000200009 |
| |
|
|
ALMEIDA,C. E. de; MARCHON-SILVA,V.; RIBEIRO,R.; SERPA-FILHO,A.; ALMEIDA,J. R. de; COSTA,J.. |
Atol das Rocas, the unique atoll in the South-western Atlantic, is located 144 nautical miles (266 Km) northeast from the city of Natal, NE Brazil and 80 nautical miles from Arquipélago de Fernando de Noronha, with geographic co-ordinates 3º51'S and 33º49"W. It's of volcanic origin and coralline formation. The reef is ellipsoid, its largest axis (E-W) is approximately 3.7 km long, and the shortest (N-S) is 2.5 km. Inside the lagoon, there are two islands: the Ilha do Farol and Ilha do Cemitério, which comprehend 7.2 Km² of emerged area. The Atol das Rocas lodges 143,000 birds, mainly by Sula dactilatra, S. leucogaster, Anous stolidus, A. minuta and Sterna fuscata. Due to their remote location, the islands remain largely undisturbed by the human activities.... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atol das Rocas; Entomological fauna of islands; Trophic niche. |
Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000200013 |
| |
|
|
VIEIRA,M. F.; SHEPHERD,G. J.. |
Floral visitors of seven species of Oxypetalum were registered in Viçosa, State of Minas Gerais. O. appendiculatum, O. banksii subsp. banksii, O. alpinum var. alpinum and O. pachyglossum are pollinated by wasps, being Polybia ignobilis (Vespidae) a pollinator of these four species. It seems that P. ignobilis promotes interspecific pollinations mainly between O. alpinum var. alpinum and O. pachyglossum, two species with very similar floral morphology. O. jacobinae, O. mexiae and O. subriparium are pollinated by bees. Wasps and bees carry one, two, three or several pollinaria in the mouthparts. O. mexiae, an endemic species in Viçosa, seems to present reproductive limitations, since its flowers are seldom visited. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bees; Interspecific pollination; Oxypetalum; Polybia; Wasps. |
Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000400018 |
| |
|
|
MOURA,M. A. M.; KUBITZA,F.; CYRINO,J. E. P.. |
The Amazonian cichlid peacock bass (Cichla sp.) is a highly marketable food and sport fish, therefore a suitable species for aquaculture. However, because of its piscivorous feeding preferences, the species does not accept dry feeds voluntarily, turning its intensive culture difficult and costly. This study aimed to wean fingerling peacock bass from inert moist food to dry diets. In a first experiment, 1,134 fingerlings weighting 0.27 g were divided in two 0.37 m³ hapas and fed ground fish flesh with 35% success. Then, 1.3 g fish were pooled, stocked in six 25 L cages and fed two pellet sequences with 80%, 60%, 40%, 20% and 0% ground fish flesh (GFF). One sequence was flavored with 10% krill meal (Euphausia sp.). Training success of fish fed the GFF-00... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tucunaré; Cichla sp.; Feed training; Palatability enhancers. |
Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000400015 |
| |
|
| |
|
|
GARCIA-FERNANDEZ,CASIMIRO; GARCIA,SONIA M. LAUER DE; GARCIA,ROSANE NUNES. |
A topographical and histological study of the male genital accessory gland complex of Boophilus microplus was undertaken. Ten lobes were found, the most prominent of which is the single dorso-median lobe, subdivided into antero-dorsal and postero-dorsal lobes. The other lobes are: a pair of postero-ventral lobes, a pair of lateral lobes (subdivided into dorso-lateral and postero-lateral lobes), a pair of antero-ventral lobes, a single medio-ventral lobe and a pair of latero-ventral lobes. These lobes were observed to present individual topographical and histological characteristics, with independent openings, hence the conclusion is that they form a gland complex. The secretory nature of the dorso-median lobe duct was also analysed. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Male reproductive system; Genital accessory glands; Ticks; Ixodidae. |
Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081998000300010 |
| |
|
| |
|
|
SIMABUKURO,E. A.; BEGOVACZ,A.; ESTEVES,L. M.; FELIPPE,G. M.. |
This paper presents an analysis of pteridophyte spore bank the site of Pedregulho, in Itirapina, state of São Paulo, Brazil. The samples of soil were collected in February (rainy season) and August (dry season) in four localities: open cerrado, cerradão, gallery forest and a disturbed area at depths of 0-5, 5-10 and 10-15 cm. The samples were collected in duplicate. Of the duplicates, one was used for spore counting and the second one for spore germination. In the cerrado, cerradão and gallery forest soil samples the values for pteridophyte spores were similar in the rainy and dry season, but in the disturbed area the percentage of spores was higher in the rainy season than in the dry season. The number of pteridophyte spores decreased with soil depth in... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fern spore bank; Gametophytes; Cerrado; Cerradão; Gallery forest; Brazil. |
Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000100017 |
| |
|
| |
|
| |
Registros recuperados: 235 | |
|
|
|