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| Registros recuperados: 208 | |
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| Silva,Luiz Gustavo Martins da; Nogueira,Lorena Bettinelli; Maia,Bruno Pereira; Resende,Lucas Borges de. |
| Fish passages are considered the oldest management tool used to minimize the impact of blocking fish migratory routes by hydroelectric power plants. However, fish passages are being installed without specific criteria in Brazil, with severe consequences to the conservation of the local fish fauna. Therefore, basic data gathered for fish passages already constructed could contribute to define operational rules, in addition to offer subsidies to decision-making and design of future facilities. Thus, the fish ladder of Baguari Dam was evaluated regarding temporal distribution, attraction, and ascension of the local fish fauna. A total of 20 fish samples were conducted immediately downstream of the dam and inside the fish ladder, from January 2010 to June... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fishway; Migratory species; Operational rule; Seasonality; Vertical-slot. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000400008 |
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| Almeida,Ronaldo de; Bernardi,José Vicente Elias; Oliveira,Ronaldo Cavalcante; Carvalho,Dario Pires de; Manzatto,Angelo Gilberto; Lacerda,Luiz Drude de; Bastos,Wanderley Rodrigues. |
| The study was conducted in Puruzinho lake (Humaitá, AM) considering seasonal periods of rainy and dry in way to elucidate the flood pulse importance in the deposition, remobilization and distributions of mercury and organic matter in bottom sediments in the Madeira River Basin (Brazilian Amazon). Bottom sediments and soils samples were analyzed for total mercury and organic matter. Mercury concentrations obtained in bottom sediment were 32.20-146.40 ng g-1 and organic matter values were 3.5 - 18.0%. The main region for accumulation of mercury and organic matter was in the central and deepest lake area In the rainy season there was a greater distribution of Hg and organic matter, mainly controlled by means of income of the Madeira river water during... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Organic matter; Indicator kriging; Madeira river; Seasonality. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000100010 |
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| Souza, Aj; Simpson, Jh; Harikrishnan, M; Malarkey, J. |
| The intensity, structure and variability of the slope current have been determined from 16 months of observations with Acoustic Doppler Current Profilers (ADCP) and conventional current meters on a cross-slope section at the Hebridean shelf edge during the Shelf Edge Study (SES) programme. After removal of the tidal signals, the mean flow over the upper slope is found to be closely parallel to the topography with speeds of . 20 cmEs.1. The flow extends down to a depth of 500 m and is predominantly barotropic, especially in winter when the flow is practically uniform between 350 m and the surface. In summer, there is a significant baroclinic component with a pronounced maximum in current at a depth of about 200 m but more than 80% of the kinetic energy is... |
| Tipo: Text |
Palavras-chave: Slope current; Seasonality; Velocity structure. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00292/40275/38648.pdf |
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| Steen, Marie. |
| Information on price-quantity relationships will enable flower producers to reduce risk and raise profits through better timing of rotations as well as better utilization of limited greenhouse space. The present paper presents econometric evidence on such price-quantity relationships for major species of cut flowers at the Dutch flower auctions. Specifically, an inverse linear approximate almost ideal demand model with seasonal adjustments is applied. This paper is introducing trigonometric functions as a flexible and inexpensive alternative that outperforms standard seasonal dummies. Major findings are that all flexibilities (quantity elasticities) are strongly significant. Own price flexibilities are negative as expected. The own flexibilities vary... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Risk management; Cut flower production; Inverse linear AIDS; Seasonality; Trigonometric functions; Demand and Price Analysis; Q11; D12. |
| Ano: 2006 |
URL: http://purl.umn.edu/25441 |
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| Smok S,Carolina; Rojas R,Mariana. |
| Ovogenesis and foliculogenesis in the mare differ from other farm animals and therefore, gamete manipulation, in vitro fertilization and embryo transfer have been very difficult. The histologic traits of ovaries from 12 mares, in estrus and diestrus were studied. Number and size of follicules and corpora lutea were recorded. The ovarian stroma was evaluated using the pricosirius technique for collagen. A simple morphometric analysis was done using computerized scanner programs. During late estrus, one dominant follicle (46 ± 4mm) is seen. The surrounding stroma contains collagen I and III. By the end of the estrus, one hemorrhagic follicle is seen, plus one or two small follicle (2 mm in size). In early diestrus there is a corpus luteum (43-60 mm) and some... |
| Tipo: Journal article |
Palavras-chave: Follicle; Stroma; Mare ovary; Seasonality. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000300007 |
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| STEINER,MARCELO G.; DALL’AGNOL,MIGUEL; NABINGER,CARLOS; SCHEFFER-BASSO,SIMONE M.; WEILER,ROBERTO L.; SIMIONI,CARINE; SCHIFINO-WITTMANN,MARIA TERESA; MOTTA,ÉDER A.M. DA. |
| ABSTRACT The Paspalum genus includes several species that are important for livestock in Rio Grande do Sul, such as P. notatum and P. guenoarum, typical of native pastures of the Pampa biome. The aim of this study was to investigate forage production and chemical composition of four ecotypes of these species in relation to the cv. ‘Pensacola’ (P. notatum). Ecotypes of P. guenoarum (Azulão and Baio) and P. notatum (André da Rocha and Bagual) and the cv. ‘Pensacola’ were evaluated for two years, during which four cuts/year were made. The work was carried out under field conditions at the Agronomic Experimental Station of the Federal University of Rio Grande do Sul (30°05’S; 51°39’W), in a completely randomized design. P. guenoarum stood out for higher... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seasonality; Fiber; Forage production dry matter; Crude protein. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401753 |
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| Wang, Xiaoyang; Garcia, Philip. |
| Price volatility in the corn market has changed considerably globalization and stronger linkages to the energy complex. Using data from January 1989 through December 2009, we estimate and forecast the volatility in the corn market using futures daily prices. Estimates in a Fractional Integrated GARCH framework identify the importance of long memory, seasonality, and structural change. Recursively generated forecasts for up to 40-day horizons starting in January 2005 highlight the importance of seasonality, and long memory specifications which perform well at more distant horizons particularly with rising volatility. The forecast benefits of allowing for structural change in an adaptive framework are more difficult to identify except at more distant... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Corn price volatility; Long memory; Seasonality; Structural change; Forecasting; Agricultural Finance; Risk and Uncertainty. |
| Ano: 2011 |
URL: http://purl.umn.edu/103749 |
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| Moraes,Gentil Vanini de; Macedo,Francisco de Assis Fonseca de; Lourenço,Fábio José; Macedo,Filipe Gomes de; Rigolon,Luiz Paulo; Nogueira,Guilherme de Paula; Santello,Graziela Aparecida. |
| The incidence of estrus in nulliparous Santa Inês (n = 16), Texel (n = 16) and Ile de France (n = 15) ewes fed two levels of crude protein (CP, 12 or 16%) was monitored from July 2005 to December 2006, and seasonality in the Santa Inês breed in the south of Brazil was characterized. The solar radiation data were recorded daily, and samples of blood were collected biweekly for determination of the plasma concentration of progesterone in Santa Inês lambs at, on average, 11±1 months of age. The female Santa Inês lambs, in the experimental period, stayed among teaser rams with a powdered-dye-ink mixture placed on their chest to mark the females that accepted to be mounted. Santa Inês ewes did not manifest estrus in the first fortnight of November and in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Photoperiodic; Progesterone; Reproduction; Seasonality. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013001000003 |
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| Pflaumann, U; Sarnthein, M; Chapman, M; D'Abreu, L; Funnell, B; Huels, M; Kiefer, T; Maslin, M; Schulz, H; Swallow, J; Van Kreveld, S; Vautravers, M; Vogelsang, E; Weinelt, M. |
| The response of the tropical ocean to global climate change and the extent of sea ice in the glacial nordic seas belong to the great controversies in paleoclimatology. Our new reconstruction of peak glacial sea surface temperatures (SSTs) in the Atlantic is based on census counts of planktic foraminifera, using the Maximum Similarity Technique Version 28 (SIMMAX-28) modern analog technique with 947 modern analog samples and 119 well-dated sediment cores. Our study compares two slightly different scenarios of the Last Glacial Maximum (LGM), the Environmental Processes of the Ice Age: Land, Oceans, Glaciers (EPILOG), and Glacial Atlantic Ocean Mapping (GLAMAP 2000) time slices. The comparison shows that the maximum LGM cooling in the Southern Hemisphere... |
| Tipo: Text |
Palavras-chave: Last Glacial Maximum; Atlantic sea-surface temperatures; Seasonality; Sea ice cover; Glacial cooling near equator; Glacial upwelling intensity. |
| Ano: 2003 |
URL: https://archimer.ifremer.fr/doc/00225/33668/32070.pdf |
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| Le Moullac, Gilles; Tiapari, Jerome; Teissier, Hinano; Martinez, Elodie; Cochard, Jean-claude. |
| The growth and reproductive cycle of cultured black-lipped pearl oysters, Pinctada margaritifera (L.), were studied in the Gambier Islands (134°52' W, 23°07' S) from September 2002 to August 2003. Temperatures were recorded throughout the year, revealing seasonal temperature variations between 22.3 °C and 27.8 °C. The mean annual chlorophyll a value, as computed from satellite data, was 0.188 ± 0.075 µg L-1. To study growth and reproduction, 720 two-year-old individuals were ear hung on longlines suspended at a depth of 7 m. Samples were taken twice a month to obtain the following measurements: shell height; wet weight of flesh and total oyster; dry weight of adductor muscle, mantle and visceral mass; and glycogen content. Gonad development was also... |
| Tipo: Text |
Palavras-chave: Pearl oyster; Pinctada margaritifera; Growth; Reproduction; Temperature; Chlorophyll; Seasonality; Gambier archipelago. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00040/15099/13570.pdf |
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| Jerônimo,Gabriela Tomas; Brum,Aline; Pádua,Santiago Benites de; Gonçalves,Eduardo Luiz Tavares; Capecci,Robson Soares; Ishikawa,Márcia Mayumi; Martins,Maurício Laterça. |
| This study evaluated the haematological parameters of the hybrid surubim (Pseudoplatystoma corruscans x P. reticulatum) farmed in intensive and semi intensive system. A total of 240 fish were examined, 120 from fish farm and 120 from a semi-intensive for comparison between the hot and cold season. The water quality was weekly measured to evaluate the influence of environmental conditions on the haematology. Fish from intensive system showed hematocrit and white blood cell count (WBC) higher in hot season while the total plasmatic protein, hemoglobin concentration, mean corpuscular hemoglobin concentration (MCHC) and mean corpuscular volume (MCV) were higher in cold season. In fish from semi intensive system, the red blood cells count (RBC) and total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Culture system; Hematology; Seasonality; Siluriformes. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000200254 |
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| PRIMO,LUIS M.; DUARTE,JOSÉ A.; MACHADO,ISABEL C.. |
| We carried out a qualitative and quantitative inventory of the hawkmoth fauna (Sphingidae) of an area of semi-deciduous seasonal rainforest in the state of Pernambuco (Tapacurá Ecological Station), northeastern Brazil. Hawkmoths were sampled monthly from October 2004 to February 2007 (27 months). We recorded 31 species from 16 genera, three tribes, and three families. Macroglossinae was the most abundant subfamily and represented ca. 71% of all species. Out of the 277 individuals collected, 88.4% were males. Five new records were made for northeastern Brazil: Enyo gorgon (Cramer, 1777), Perigonia stulta (Herrich-Schäffer, [1854]), Eupyrrhoglossum sagra (Poey, 1832), Nyceryx coffaeae (Walker, 1856) and Xylophanes chiron (Drury, 1773). Eight further species... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dry forest; Pernambuco Endemism Center; Phenology; Seasonality; Sphingidae abundance and richness; Sphingophily. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000301177 |
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| Bosso,Patrícia Alves Ramos; Candeias,João Manuel Grisi; Paduan,Karina dos Santos; Ricchetti,Sandra Mara Queiroz; Miranda,Antero Frederico Macedo de; Rugolo,Lígia Maria Suppo de Souza; Durigon,Edison Luiz; Ventura,Armando Morais. |
| Human Respiratory Syncytial Virus (HRSV) is recognized as the single most important pathogen responsible for acute viral infection of the lower respiratory tract in young children. In this study, 84 samples from children under two years of age presenting acute respiratory symptoms were obtained from September 2000 to November 2001. Analysis by immunofluorescence and reverse-transcription followed by PCR, revealed that 18% (15/84) of all the samples were positive for HRSV, in which 80% (12/15) of the cases was observed in children under six months of age and the subgroups A and B co-circulated in the studied period. These are the first data obtained for Botucatu city and seasonality is evident by the higher circulation of the virus between May and July. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Human Respiratory Syncytial Virus (HRSV); RT-PCR; Immunofluorescence; Seasonality. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000300015 |
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| Passos,Fernando C.; Alho,Cleber J. R.. |
| Prey foraging behavior in the Black Lion Tamarin, Leontopithecus chrysopygus (Mikan, 1823) was observed in the Caetetus Ecological Station, southeastern Brazil, during 550 hours of direct observations between December 1993 and February 1995. The scan sampling method was used to gather data. These tamarins use manipulative, specific-site foraging behavior. When searching for animal prey items, they examine a variety of microhabitats. The most important microhabitat used for prey foraging behavior was tree cavities (41% of the foraging observations), but palm trees (22%), bamboo (12%), vines (11%), bark (5%), seed pods of the "jequitiba" tree (4%), other places (3%) and epiphytes (2%) were also observed. Animal preys were frequently captured in understory... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mammalia Leontopithecus chrysopygus; Black lion tamarin; Foraging behavior; Microhabitats; Seasonality; Primates. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000500029 |
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| Registros recuperados: 208 | |
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