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| Registros recuperados: 187 | |
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| Catois, Stéphane; Haure, Joel; Martin, J-l.; Nourry, Max; Palvadeau, Hubert; Baud, Jean-pierre. |
| Mortality among juvenile Crassostrea gigas has been occuring during the summer months since 1995 and is now considered to be a real problem for French oyster culture. The aim of this study was to standardise the stress that could be applied to Crassostrea gigas spat. In initial experiments in 1998, the weight of individual spat and the duration of a heat shock at 50°C in freshwater, adapted for oysters of between 500 and 2000 mg, were built into a model to obtain 50% mortality. However, the precision was low (50%) and will need to be improved in the future. Following this, hatchery-produced juveniles weighing 10 to 500 mg were subjected to heat shock at 45°C in heshwater ; the duration of the shock was calculated based on a model built in 1997. The results... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Stress; Choc thermique; Mortalité; Crassostrea gigas; Stress; Heat shock; Mortality. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00080/19095/16690.pdf |
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| Silva,Mirian de Sousa; Brommonschenkel,Sérgio Hermínio; Faria,José Márcio Rocha; Borges,Eduardo Euclydes de Lima e. |
| The objective of this study was to partially characterize some genes involved in the desiccation tolerance of the embryonic axis of Melanoxylon brauna seeds subjected, or not, to oven fast-drying. Seeds were initially dried rapidly in an oven at 40 ºC, 50 ºC, 60 ºC, 70 ºC, and 80 °C, for 24, 48 and 72 h and then subjected to germination tests and moisture content determination. Degenerate primers were designed for 19 genes. The CDNA was used as a template for PCR amplifications using the degenerate primers, and the PCR products obtained were purified, cloned and sequenced. The seeds showed a gradual reduction in percent germination with increasing temperature and drying time. Nucleotide sequences of the cloned fragments related to genes CAT1, SPS1, Abi5,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water; Stress; Drying; Sequencing. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000100004 |
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| Silva,Janaina Della Torre da; Gravena,Rodrigo Antonio; Marques,Rafael Henrique; Silva,Vanessa Karla; Hada,Fabricio Hirota; Moraes,Vera Maria Barbosa de; Malheiros,Ramon Diniz. |
| The objective of this study was to assess the effect of the inclusion of passionflower (Passiflora alata) in diets on performance, behavior, heterophil/lymphocyte ratio (H/L), corticosterone plasma levels (CPL) and immune response of quails. The study was carried out using 192 birds, distributed in randomized blocks with 4 diets (0, 125, 250 and 375 and 0, 250, 500 and 750 mg of passionflower/kg of feed for the rearing and laying period, respectively), 8 replicates and 6 birds per experimental unit. The rearing period began when birds were 28 days of age and it lasted for 15 days. In this phase, it was evaluated daily feed intake, daily weight gain, feed conversion, viability, tonic immobility time, intensity of injuries, behavior, heterophil/lymphocyte... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Behavior; Corticosterone; Heterophil/lymphocyte ratio; Immune response; Stress; Tonic immobility. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000700020 |
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| Oka,CH; Bueno,LGF; Souza,SRL; Balan,JAO; Silva,KM; Polycarpo,GV; Iwayama,LH. |
| ABSTRACT Among the several factors required in breeding laying hens, debeaking is a factor that interferes with batch performance and affects animal welfare. Thus, the objective of this study was to evaluate three different debeaking procedures and to verify the best technique to be used. For this, the performance of the birds, the incidence of cannibalism, and in rearing phase, the quality of the eggs were evaluated. Dekalb White birds were distributed in a completely randomized design with three treatments, T1 (infrared radiation debeaking) T2 (hot blade debeaking) and T3 (V debeaking).The data was submitted to Analysis of Variance and compared by Tukey’s test (95%), using statistical software R. The frequencies of mortality and cannibalism were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal welfare; Behavior; Stress; Egg quality. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000400717 |
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| Méndez,Yurany Dayanna Rivera; Chacón,Leonardo Moreno; Bayona,Cristihian Jarry; Romero,Hernán Mauricio. |
| Water supply is the main yield-limiting abiotic factor of oil palm in Colombia. To determine the effect of water deficit on the physiology of oil palm and to assess the tolerance degree to this condition, interspecific Elaeis oleifera versus Elaeis guineensis 'U1273', 'U1859', 'U1914', and 'U1937' hybrids were planted for 60 days in soil with different water potentials (-0.042, -0.5, -1.0, and -2.0 MPa) in a complete randomized factorial design with three replications. The water potential, osmotic adjustment molecules (total and reducing sugar content), gas exchange (photosynthesis rate, stomatal conductance, water use efficiency, and leaf respiration), and vegetative growth (height, bulb diameter, leaf area, number of leaves, total dry matter, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ecophysiology; Growth; Stress; Tolerance; Water potential. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000400006 |
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| Mugnier, Chantal; Lemonnier, Hugues; Legrand, Alexandre. |
| The blue shrimp Litopenaeus stylirostris was exposed to pond sediment for 48 h and its physiological response was studied in relation to molt stage. Shrimp were maintained in cages within a semi-intensive pond after 4 months of rearing. Hypoosmoregulatory capacity (hypo-OC), magnesium ions (Mg ions), glucose, total proteins and oxyhaemocyanin were assayed in haemolymph. An increase of 370% to 500% in Mg ions concentration and 200% to 266% in glucose concentration, and a decrease in hypo-OC in shrimp maintained close to the centre of the pond indicated a short-term stress response in all molt stages. Indicators of water and sediment pore water quality were within normal operating limits, however this area was characterized by high water content and... |
| Tipo: Text |
Palavras-chave: Stress; Pond bottom; Penaeid shrimp; Molt stage; Haemolymph constituents; Litopenaeus stylirostris. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1675.pdf |
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| Sokolowski, A; Wolowicz, M; Hummel, H; Bogaards, R. |
| Physiological and behavioral responses to Cu exposure were measured in the Baltic clam Macoma balthica from the Gulf of Gdansk, southern Baltic Sea. The burrowing activity, mortality rate, glycogen content, condition index and free amino acid (FAA) composition were analysed as indicators of stress in a series of field and laboratory studies. M. balthica exposed to Cu showed clear Cu-concentration related differences in burrowing activity and mortality rate, but no consistent differences in the condition index, glycogen content, and free amino acids. The clams from a less polluted area reacted more strongly and were more sensitive to additional stress as compared to organisms from a more polluted region. The effect of Cu on the ecophysiology of Baltic clams... |
| Tipo: Text |
Palavras-chave: Stress; Cuivre; Écophysiologie; Macoma balthica; Mer Baltique; Stress; Copper; Ecophysiology; Macoma balthica; Baltic Sea. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00325/43606/43925.pdf |
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| Abreu,Janessa Sampaio de; Urbinati,Elisabeth Criscuolo. |
| The role of vitamin C on physiological responses of matrinxã (Brycon amazonicus) submitted to air exposure was analyzed. Nine hundred fish (70.15 g) were distributed in fifteen 500 l boxes (60 fish.box-1) and fed five rations (treatments): Control (no vitamin C); T100 (100 mg); T200 (200 mg); T400 (400 mg) and T800 (800 mg of vitamin C kg.ration-1). Each ration was offered to fish of three boxes during 60 days before the stress challenge that consisted of exposing fish to air for two minutes. Samplings were carried out for 5, 15, 30 and 60 minutes after the air exposure. Blood was collected for glucose, cortisol, total protein, sodium, chloride, hematocrit, hemoglobin determination, and white and red cell count. Liver was removed for hepatosomatic index... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brycon amazonicus; Capture; Stress; Ascorbyl - polyphosphate. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672006000400013 |
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| Serra,Mônica; Wolkers,Carla Patrícia Bejo; Hoshiba,Márcio Aquio; Urbinati,Elisabeth Criscuolo. |
| This study evaluated stress indicators of juvenile piau (Leporinus friderici) during and after a 4-hour transportation in order to establish an appropriate transportation protocol for this type of fish. Fish were transported in plastic bags (133.1 g/L) and sampled before loading, during 1, 2, 3 and 4 h and after transportation (2, 6, 12 and 24 h). Blood samples were analyzed for cortisol and glucose levels, hematocrit, hemoglobin level, number and mean corpuscular volume of erythrocytes. Water pH, dissolved oxygen, temperature and ammonia were monitored before, during and after transportation. No mortality was observed through the experiment. Ammonia levels increased throughout transportation, but the low pH values kept NH3 in safe levels for fish.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cortisol; Fish transport; Stress. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200004 |
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| Gomes,Levy de Carvalho. |
| Pirarucu (Arapaima gigas) is an obligatory air-breathing fish from the Amazon basin. Previous study showed that pirarucu juveniles present a latency period in their response to moderate stress (transportation). Therefore the objective of this study was to verify the effects of a prolonged air exposure stress in lactate, glucose, cortisol, haematocrit, haemoglobin, and liver glycogen in pirarucu. Thirty-six fish were handled by netting and subjected to air exposure for 75-min. Six fish were sampled before handling and at 0, 6, 24, 48, and 96h after handling. Fish cortisol, lactate and haematocrit rose after handling, returning to previous unstressed values on the following sampling (6h after handling). Glucose increased significantly after handling and that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pirarucu; Stress; Air exposure; Glycogen; Cortisol; Glucose; Lactate; Haematocrit. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672007000400019 |
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| Inoue,Luis Antonio Kioshi Aoki; Moraes,Gilberto; Iwama,George K.; Afonso,Luis Orlando Bertola. |
| The present work evaluated several aspects of the generalized stress response [endocrine (cortisol), metabolic (glucose), hematologic (hematocrit and hemoglobin) and cellular (HSP70)] in the Amazonian warm-water fish matrinxã (Brycon amazonicus ) subjected to an acute cold shock. This species farming has been done in South America, and growth and feed conversion rates have been interesting. However, in subtropical areas of Brazil, where the water temperature can rapidly change, high rates of matrinxã mortality have been associated with abrupt decrease in the water temperature. Thus, we subjected matrinxã to a sudden cold shock by transferring the fish directly to tanks in which the water temperature was 10ºC below the initial conditions (cold shock from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Matrinxã; Cold shock; Stress; HSP70. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672008000400002 |
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| Nardi,Serenella; Pizzeghello,Diego; Schiavon,Michela; Ertani,Andrea. |
| ABSTRACT In recent years, the use of biostimulants in sustainable agriculture has been growing. Biostimulants can be obtained from different organic materials and include humic substances (HS), complex organic materials, beneficial chemical elements, peptides and amino acids, inorganic salts, seaweed extracts, chitin and chitosan derivatives, antitranspirants, amino acids and other N-containing substances. The application of biostimulants to plants leads to higher content of nutrients in their tissue and positive metabolic changes. For these reasons, the development of new biostimulants has become a focus of scientific interest. Among their different functions, biostimulants influence plant growth and nitrogen metabolism, especially because of their... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hormones; Nitrogen metabolism; Carbon metabolism; Phenylpropanoid pathway; Stress. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000100018 |
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| Marques,Douglas José; Ferreira,Mozart Martins; Lobato,Allan Klynger da Silva; Freitas,Wellington Alves de; Carvalho,Jacinto de Assunção; Ferreira,Ewerton Dilelis; Broetto,Fernando. |
| ABSTRACT The aim of this study was to evaluate the potential of calcium silicate to mitigate the effects of water deficiency in maize plants yield. A completely randomized factorial design, consisting of five combinations of calcium silicate (0, 25, 50, 75, and 100%) and five different soil moisture levels (30, 70, 100, 130, and 160%), was adopted. The following parameters were evaluated: soil matric potential, xylem water potential, silicon concentration, leaf dry weight, and dry mass production. Matric potential monitoring confirmed that the irrigation depths employed resulted in different environments for maize plant development during the experiment. Confirming the hypothesis of the study, at the lower irrigation depths, the maize production has... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dry matter; Irrigation; Silicon; Stress. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000300275 |
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| Registros recuperados: 187 | |
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