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| Registros recuperados: 208 | |
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| Camargo,Carolina R.; Colares,Elton; Castrucci,Ana Maria L.. |
| Mammalian seasonalmolting and color change are known to be influencedby photoperiod changes. Calomys laucha, a South American rodent, exhibits seasonal pelage color change; however, unlike Northern hemisphere rodents, which present a gray or brown color during summer and a whitish color during winter, C. laucha pelage changes from an orange color during summer to a dark gray color during winter. Animals maintained for over a year in stationary photoperiod (LD 12:12h, 22ºC) presented orange pelage color during the summer corresponding month (January), and gray color during the winter corresponding month (July). Same age animals were evaluated during summer or winter months, and also showed different colors. Animals exposed for 12 weeks to summer or winter... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Color change; Endogenous rhythm; Seasonality; Molt; Pelage color. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000100009 |
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| Machado,Terezinha Feitosa; Pereira,Rita de Cássia Alves; Batista,Valéria Chaves Vasconcelos. |
| Lippia alba is a shrub of the Verbenaceae family, popularly known as lemon balm. It's essential oil is said to have broad-spectrum antimicrobial activity whose effectiveness varies according to its composition, which is influenced by both biotic and abiotic factors. The present study aimed to evaluate the antimicrobial effectiveness of oil taken from the leaves of L. alba collected at different times of the year, against microorganisms of importance in food. The oil, obtained by hydrodistillation, was tested against standard cultures of Pseudomonas aeruginosa, Salmonella choleraesuis, Escherichia coli, Staphylococcus aureus, Listeria monocytogenes and Listeria innocua using agar diffusion techniques. The different sampling times had a big influence on the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lippia alba; Antimicrobial activity; Seasonality. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000300011 |
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| Torres,Felipe Rafael; Madi-Ravazzi,Lilian. |
| The composition and the seasonality of the natural populations of Drosophila species in relation to the climatic variables temperature and rainfall were analyzed from September 1998 through October 1999 by monthly collections, in two woodlands in the Northwest of the State of São Paulo, Brazil. The diversity dominance component curves were inclined, reflecting low diversity and high dominance of few species. Among the 25 species recorded, Drosophila sturtevanti Duda, 1927 was the most frequent and abundant. On the opposite to data in literature, D. paranaensis Barros, 1950 abundance and frequency were greater than those from D. mercatorum Patterson & Wheeler, 1942. A positive correlation between abundance and rainfall was observed for D. nebulosa... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil; Abiotic factors; Seasonality; Drosophila; Biodiversity. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212006000400008 |
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| Xiaofeng,Luan; Changjie,Zhao; Cenyi,Hui; Xiuxiang,Meng. |
| Musk deer farming has the potential to be an effective conservation tool for the protection of musk deer as well as the production of valuable musk. To be successful, this requires a thorough understanding of the behavior of captive musk deer in order to improve their reproductive success and management. Between August 2005 to January 2006, the behavior sampling of 19 male and 13 female captive alpine musk deer, Moschus sifanicus Büchner, 1891, was used to examine the durations of twelve behavioral characteristics during the pre-rut (August to October) and rut seasons (November to January). Both males and females exhibited some seasonal variation in behavior. Males rested and fed more during the pre-rut than the rut and spent more time walking, fighting,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Behavior; Captivity; Seasonality. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000600002 |
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| Santos-Pereira,Manuela; Candaten,Adriane; Milani,Douglas; Oliveira,Frederico B.; Gardelin,Joana; Rocha,Carlos F. D. da. |
| In this study we provide the first data regarding community parameters of leaf-litter anurans inhabiting a forest floor in the state of Paraná, southern Brazil, including information on community species richness, composition, specific density and biomass. Our study was conducted at Salto Morato Natural Reserve using forty plots of 4 x 4 m for each one of the four seasons (winter, spring, summer and autumn), totaling 2.560 m² of forest floor sampled. We sampled a total of 96 frogs inhabiting the forest floor, belonging to seven species: Brachycephalus hermogenesi (Giaretta & Sawaya, 1998), Ischnocnema guentheri (Steindachner, 1864), Haddadus binotatus (Spix, 1824), Leptodactylus gr. marmoratus, Physalaemus spiniger (Miranda-Ribeiro, 1926),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Rainforest; Density; Richness; Seasonality. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000600008 |
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| Machado,Sandro Charopen; Fischer,Vivian; Stumpf,Marcelo Tempel; Stivanin,Sheila Cristina Bosco. |
| ABSTRACT The objective of this research was to determine the variation of milk stability evaluated with ethanol, boiling, and coagulation time tests (CTT) to identify milk components related with stability and verify the correlation between the three methods. Bulk raw milk was collected monthly at 50 dairy farms from January 2007 to October 2009 and physicochemical attributes, somatic cell (SCC), and total bacterial counts (TBC) were determined. Milk samples were classified into low, medium, and high stability to ethanol test when coagulation occurred at 72 °GL, between 74 and 78 °GL, and above 78 °GL, respectively. Univariate analysis was performed considering the effects of year, months, and interaction in a completely randomized design. Principal factor... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Milk composition; Seasonality; Somatic cell count. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000400340 |
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| Camargo Neto,AF; Tallarico,E; Capriogli,MA; Soares,VE; Meireles,MV; Silva,GS. |
| The seasonality of Alphitobius diaperinus population was studied during different seasons during one year, in broiler facilities located in the center-north region of the State of São Paulo. Parasite counting was weekly carried out by the use of traps adapted from the modified model of Arends. During the experimental period, facilities were not submitted to chemical treatment, and the litter was changed between flocks. A lower number of adults and larvae was observed during autumn, with the peak registered in the summer. There was no significant difference between spring and winter averages (adults and larvae), and between spring and summer averages (adults). Average temperatures in the facilities varied from 23.4ºC (winter) to 27.1ºC (spring). The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alphitobius diaperinus; Broiler chickens; Monitoring; Seasonality. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2006000300008 |
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| Mineo,Marina Farcic; Del-Claro,Kleber; Brescovit,Antonio Domingos. |
| The Brazilian Savanna Ecoregion (Cerrado) is one of the richest biomes in the world, with a characteristic highly seasonal climate a dry season between May and September and a rainy season from October through April. Ground-dwelling spiders from three Cerrado phytophysiognomies, "campo cerrado", "cerrado" and "cerradão", were sampled using pitfall traps during two years, totaling 111 species and 3,529 individuals. The abundance of individuals and species richness was higher during the wet season. Fifty-eight species were captured exclusively during that period, whereas only nineteen were restricted to the dry season. Only two species were found in all samples. The number of juveniles was higher than the number of adults in all phytophysiognomies and in all... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Araneae; Brazil; Community ecology; Seasonality. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000300006 |
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| Dutra,Bibiana K.; Silva,Karina M. da; Zank,Caroline; Conter,Maria R.; Oliveira,Guendalina T.. |
| The goal of this study was to evaluate the effect of a high-carbohydrate diet (HC) and a high-protein diet (HP) on the metabolism of the crayfish Parastacus brasiliensis (Von Martens, 1869), collected in different seasons and maintained in the laboratory for 15 days. Crayfish were collected monthly from January 2002 to January 2004 at São Francisco de Paula, Southern Brazil, in Guarapirá stream. In the laboratory, the animals were kept submerged in aquariums under controlled conditions. They were fed ad libitum, for 15 days with either a HC or HP diet. At the end of this period, haemolymph samples were collected, as were hepatopancreas, gills, and abdominal muscle that were removed for determination of glycogen, free glucose, lipids, and triglycerides. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crayfish; Experimental culture; Diet; Metabolism; Seasonality. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212008000400003 |
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| Araújo,Cristiane S.; Candido,Denise M.; Araújo,Helder F. P. de; Dias,Sidclay C.; Vasconcellos,Alexandre. |
| Seasonal variations in scorpion activity were investigated during a 24 month period in an area of Caatinga (dryland) vegetation in the state of Paraíba, Brazil. The total number of scorpions captured was correlated with climatic variables and prey abundance. Scorpions were captured monthly using pitfall traps; their potential prey was captured using malaise, beating trays and pitfalls. A total of 104 scorpions were captured, representing four species: the bothriurids Bothriurus asper (Pocock, 1893) (n = 74; 71.2%) and B. rochai (Mello-Leitão, 1932) (n = 20; 19.2%), and the buthids Rhopalurus rochai (Borelli, 1910) (n = 4; 3.8%) and Tityus stigmurus (Thorell, 1876) (n = 1; 1.0%). The sex ratios (male:female) of the two most abundant species were 14:1 for B.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental factors; Neotropical region; Reproduction; Semi-arid; Seasonality. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000300008 |
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| Smyth, Paul; Harte, Laurence; Hennessy, Thia C.. |
| This paper examines the relationship between calving date and production costs on Irish dairy farms from 2000-2007. Using data from the National Farm Survey, the median calving dates of 400 dairy farms are studied each year using econometric analysis to determine the relationship between calving date and production costs. Farms are divided into five categories according to their median calving date. These categories are imputed into a panel dataset as dummy variables. Unobservable individual effects are controlled for using a fixed effect model; examples of such effects are land quality and managerial ability, Results suggest that when scale and those unobserved effects are controlled for, there was no significant difference in total cost of production per... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Seasonality; Fixed effect; Calving date; Production Economics. |
| Ano: 2009 |
URL: http://purl.umn.edu/51076 |
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| Linzmeier,Adelita Maria; Ribeiro-Costa,Cibele Stramare. |
| Seasonality was studied for Alticini trapped with malaise over a period of two years in the Vila Velha State Park, Parana, Brazil. Coleoptera, Chrysomelidae and Alticini showed seasonal distribution, with the highest abundance during spring and summer months. The abundance peaks of these groups were not synchronized. Of all environmental variables tested, photoperiod had the larger effect on the distributional patterns of Coleoptera, Chrysomelidae and Alticini. Also, Chrysomelidae and Alticini probably are related to the quality and availability of host-plants. When richness was high there was a greater similarity among seasons of different years. However, when richness was not pronounced, seasons showed more similarity within the same year than between... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abundance; Community structure; Competition; Herbivorous; Seasonality. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262008000200009 |
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| Van Haren, Hans; Millot, Claude. |
| In the central Ligurian Basin, Western Mediterranean Sea, dense water formation occurs in winter so that near-surface stratification displays a marked seasonality. Consequently, kinetic energy spectra from the surface to intermediate depths are entirely different in summer and winter. In summer, the spectra show a peak near the local inertial frequency (f). The polarization of currents in the internal gravity wave frequency (sigma) band (f < sigma < N, N the buoyancy frequency) resembles internal wave theory (for N >>f). In winter, however, no significant near-inertial (or any other) spectral peak is observed and motions are not polarized at any frequencies, whatever the observation depths. With respect to the energy levels observed in summer,... |
| Tipo: Text |
Palavras-chave: Ligurian Sea; Kinetic energy spectra; Internal gravity wave; Seasonality; Mer Ligure; Spectres d'énergie cinétique; Ondes internes de gravité; SeaVariations saisonnières. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/publication-534.pdf |
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| Azevedo,Celso Oliveira; Santos,Hélio Sá. |
| A survey of Monomachidae species was carried out in anarea of Atlantic rain forest of the Biological Reserve of Duas Bocas, Espírito Santo State, Brazil between September, 1996 and August, 1997. Two species of Mollomachus Klug, 1841, M. fuscator Perty, 1833 and M. eurycephalus Schletterer, 1890 were collected from May to September. Both species are typical of winter time and showed the same parttern of seasonality. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hymenoptera; Monomachidae; Monomachus; Seasonality; Neotropical. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000200010 |
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| Fujimoto,Rodrigo Yudi; Anjos,Ellem Cristina Silva dos; Ramos,Fabrício Menezes; Martins,Maurício Laterça. |
| The current study presents a parasitological survey of larval nematodes from freshwater ornamental fish Iguanodectes spilurus caught in the watercourse of the Caete River, in the northeast region of the State of Para, Brazil. A total of 176 specimens, 1.36±0.75 g weight and 5.53±0.98 cm total length, were analyzed. Nematode larvae were identified as Capillaria sp., Procamallanus sp. and Anisakidae, with prevalence of 70.45% and infection intensity ranging from 1.81 to 4.70 larvae. The highest prevalence 57.38% occurred in the liver, but no seasonality was observed, indicating high infection throughout the year. Seasonality was observed in fish parasitized in the stomach, intestine and caecum, with prevalence and mean intensity of 17.61% and 2.32 parasites,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Characidae; Parasitology; Seasonality; River. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672013000400013 |
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| Lahaye, Noe; Gula, Jonathan; Roullet, Guillaume. |
| The upper ocean is energetic at scales below the Rossby deformation radius owing to the existence of internal waves and submesoscale fronts and vortices. These contribute significantly to energy dissipation, tracer mixing and exchanges between the ocean surface layer, the ocean interior, and the atmospheric boundary layer. Internal waves and submesoscale motions both undergo strong spatial and seasonal variations, driven by different mechanisms. Here, we investigate the sea surface signature of internal waves and its seasonality using linear wave theory and a high‐resolution realistic simulation. In summer, internal waves are greatly amplified near the surface mostly due to a thin mixed layer bounded by a seasonal pycnocline. This surface amplification is... |
| Tipo: Text |
Palavras-chave: Internal tide; Submesosacle dynamics; Seasonality. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00486/59746/62847.pdf |
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| Schmitt, A.; Elliot, M.; Thirumalai, K.; La, C.; Bassinot, F.; Petersen, J.; Movellan, A.; Jorry, Stephan; Borgomano, J.. |
| The ratio of magnesium to calcium (Mg/Ca) in foraminiferal shells is commonly used as a proxy for past ocean temperature. Recent advances in elemental analyses now enable single-specimen measurements of planktic foraminifera and thus, can provide information on past seasonal and interannual variability, owing to the near-monthly lifespan of foraminifera. In this study, we explore the temperature variance recorded by Mg/Ca in tests of foraminifera Globigerinoides ruber, a planktic species that occurs throughout the year in tropical waters. Using LA-ICP-MS, we characterize Mg/Ca variability in single specimens of two morphotypes of G. ruber picked from a sediment core retrieved offshore New Caledonia. We provide an estimate of the range of calcification... |
| Tipo: Text |
Palavras-chave: Globigerinoides ruber; Mg/Ca ratio; Sea surface temperature; LA-ICPMS; Seasonality; Quaternary. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00472/58336/60890.pdf |
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| Registros recuperados: 208 | |
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