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| Registros recuperados: 187 | |
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| Salaro, Ana Lúcia; Campelo, Daniel Abreu Vasconcelos; Tavares, Mateus Moraes; Braga, Luiz Gustavo Tavares; Pontes, Marcelo Duarte; Zuanon, Jener Alexandre Sampaio. |
| Two experiments were performed. The first aimed to assess the tolerance of fingerlings Astyanax altiparanae to water salinity. Fish were exposed to salinity of 0, 3, 6, 9, 12 or 15 g NaCl L-1 for 96 hours. The fish mortality was 0%, in the levels of 0, 3 and 6 g L-1; 75% in the level of 9 g L-1and 100% at 12 and 15 g L-1 of common salt. The second experiment aimed to assess the parameters of water quality, mortality and blood glucose during transport. For this, A. altiparanae were stored in plastic bags at 22, 30 and 37 g of fish L-1 stocking densities and salinity of 0, 3, 6 and 9 g L-1, for. Fish showed similar mortality levels in the different salinities and stocking densities. The increase in fish density reduced the dissolved oxygen levels and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.06.03.04-3 density; Stress; Glucose; Oxygen; Common salt Piscicultura. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/26884 |
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| Moraes, Elzira Diniz de; Instituto de Ensino Superior de Londrina; Zaia, Cássia Thaís Bussamra Vieira; Universidade Estadual de Londrina; Zaia, Dimas Augusto Morozin; Universidade Estadual de Londrina; Santos, Angelo Alexander Torres dos; Universidade Estadual de Londrina; Ribeiro, Rachel Cezar de Andrade; Universidade Estadual de Londrina; Silva, Andreia Lopes da; Universidade Estadual de Londrina. |
| Sex differences related with pain have been studied and evidences suggesting influence of sex steroid hormones on the thresholds of pain. Experimental nociception has been test using formalin as a model of nociceptive stimulus. Association of stress, pain and metabolic and hormonal changes has not been explored. The aim of this study was to compare metabolic and hormonal changes between male rats and female rats in proestrus and estrus cycle after painful stimulus by formalin into the masseter muscle. Male and female Wistar rats (200-250 g b.w.) were submitted to an injection of formalin (F, 1.5%) or saline (S, 9.9%) into the masseter muscle and after 0 (N, control group without injection), 5, 15, 30 or 60 minutes they were decapitate and blood was... |
| Tipo: Estudos fisiológicos |
Palavras-chave: 2.00.00.00-6 sex differences; Nociception; Stress; Hormones; Rats 2.07.00.00-8. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/10568 |
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| Dehghan Hesar, Hadi; Kalantari, Davood. |
| This study presents a numerical investigation regarding the stress distribution on the new designed disc harrow using the ANSYS software. A conventional disc, notched disc, and a biomimetic design inspired by the claw of the leatherwing were analyzed in two conventional plowed and unplowed soils and three tillage depths (4, 7 and 10 cm). Stress analysis for all treatments showed that the highest stress was imposed at the disc-stem junction. Meanwhile the highest deformation occurred at the lowest and the most external part of the discs (land line). The results obtained in this study indicated that the maximum stress exerted from tilling soil to discs increases linearly with tillage depth in both plowed and unplowed soils. Given these results, the maximum... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stress; Disk harrow; Finite element; Resistance; Biomimetic. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3561 |
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| Quiroz-González,Beatriz; Corrales-García,J. Joel E.; Colinas-León,M. T. Beryl; Ybarra-Moncada,M. Carmen. |
| Abstract The pitahaya (Hylocereus undatus) is highly perishable and susceptible to chilling injury (CI) The objective of this study was to measure a set of biochemical, physiological, physical-chemical and physical variables in gradually chilling injured pitahaya fruits and assess the degree of correlation of each one with this damage. Pitahayas were stored at 2 or 7±1 °C and 90±6 % RH for up to 30 d, and then held at 22±4 °C and 60±8 % RH for up to 7 d. A visual evaluation of CI was conducted using a five point hedonic scale after storage and transfered to 22 °C. Titratable acidity (TA), total soluble solids, TSS/TA ratio, superoxide dismutase activity (SOD), glutathione activity (GR), piruvate decarboxylase (PDC), alcohol deshydrogenase activity (ADH),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stress; Pitahaya; Postharvest; Refrigerated storage; Chilling injury. |
| Ano: 2017 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952017000200153 |
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| OLIVEIRA,FABRÍCIO S.; MACITELLI,FERNANDA; SANTOS,CAIO C.C.; BRAGA,JANAINA S.; COSTA,BARBARA C.; PASTORE,MARINA; ROCHA,THIAGO A.S.S.; COSTA,MATEUS J.R.P. DA. |
| Abstract Chronic stress exposure commonly increases adrenals weight and changes their morphology. This study aimed to compare four methods to delimitate the cortical and medullary layers of adrenals glands in Nelore bulls. Fresh adrenals did not present differentiation between layers. Then, frozen adrenals were distributed in plastics bags with fixative Bouin (G1), 96ºGL ethylic alcohol (G2), 10% formaldehyde (G3), or 2.5% glutaraldehyde (G4). After 12 hours of fixation, the G1 adrenal glands did not show the entire cortical layer marked by Bouin’s solution. For G2 and G3 there was a poor contrast, while for G4 there was a reasonable contrast. After 24 hours of fixation, G1 had an excellent contrast between layers, while G2 and G4 had a reasonable contrast... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal welfare; Morphometry; Stress; Anatomy; Gland. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703887 |
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| ORSI,RICARDO O.; SANTOS,VIVIAN G. DOS; PEZZATO,LUIZ E.; CARVALHO,PEDRO L.P.F. DE; TEIXEIRA,CAROLINE P.; FREITAS,JAKELINE M.A.; PADOVANI,CARLOS R.; SARTORI,MARIA M.P.; BARROS,MARGARIDA M.. |
| ABSTRACT The effect of the ethanolic extract of propolis (EEP) on Aeromonas hydrophila was analyzed by determination of minimum inhibitory concentration (MIC). Then, the effects of crude propolis powder (CPP) on growth, hemato-immune parameters of the Nile tilapia, as well as its effects on resistance to A. hydrophila challenge were investigated. The CPP (0.5, 1.0, 1.5, 2.0, 2.5 and 3.0%) was added to the diet of 280 Nile tilapia (50.0 ± 5.7 g fish-1). Hemato-immune parameters were analyzed before and after the bacterial challenge. Red blood cell, hematocrit, hemoglobin, mean corpuscular volume (MCV), mean corpuscular hemoglobin concentration (MCHC), and hydrogen peroxide (H2O2) and nitric oxide (NO) were evaluated. The MIC of the EEP was 13% (v/v) with a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Health; Hematology; Immunology; Oreochromis niloticus; Propolis; Stress. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401785 |
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| BASSETTO,RICARDO M.; WSCIEKLICA,TATIANA; POUZA,KATHLEIN C.P.; ORTOLANI,DANIELA; VIANA,MILENA B.; CESPEDES,ISABEL C.; SPADARI,REGINA C.. |
| ABSTRACT The aim of this work was to investigate if eletroacupuncture at PC6 would modulate the stress-induced anxiety-like behavior and the level of activation of several brain areas. Rats were distributed in groups: control; submitted to immobilization; submitted to immobilization and eletroacupuncture at PC6 or at the tail. Immobilization increased grooming and decreased stretched attend postures and the time spent in the open arms of the ele-vated plus-maze. Eletroacupuncture at PC6 or tail canceled the effect of immobilization on grooming and attenuated the stretched attend posture. Immobilization increased Fos-immunoreactivity in the prefrontal cortex, medial and central amygdala, paraventricular and dorsomedial nuclei of the hypothalamus, lateral... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stress; Electroacupuncture; Anxiety; Elevated plus-maze; Fos-immunoreactivity. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000301003 |
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| Burns,L.V.; Ramos,A.T.; Veiga,A.P.M.; Moron,S.E.; Cordova,F.M.; Miotto,F.R.C.; Viana,E.B.; Zimermann,F.C.; Minharro,S.; Stefanine,N.R.; Sousa,L.F.. |
| ABSTRACT The study evaluated the effect of transportation over long distances on cattle muscle tissue of submitted to emergency slaughter in slaughterhouses in northern Tocantins, Brazil. The evaluations consisted in pH, muscle and liver glycogen, muscle histopathology and creatine kinase (CK), alanine aminotransferase (ALT) and aspartate aminotransferase (AST) activity. Animals were placed into two groups: Experimental Group (EG), consisting of 19 bovines intended for immediate emergency slaughter, and Control Group (CG), composed of 24 bovines slaughtered in accordance with the normal flow. CK and ALT levels were high in EG. AST did not differ between groups. EG showed higher muscle pH and mean of degenerate fibers, mainly on the intercostal. However,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bovine; Muscle degeneration; Muscle glycogen; Stress; PH. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000301067 |
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| Aride,P.H.R.; Oliveira,A.T.; Oliveira,A.M.; Ferreira,M.S.; Baptista,R.B.; Santos,S.M.; Pantoja-Lima,J.. |
| ABSTRACT Tambaqui,Colossoma macropomum is a fish of primary importance in Brazilian aquaculture and in the Amazon region in particular. The aim of this work is to analyze the combined effects of physical training and levels of dietary cassava (Manihot esculenta) on the hematological parameters, food intake, conversion efficiency, growth ratio and swimming performance of this fish. A diet for tambaqui consisting of 30% cassava caused decreases in weight gain and specific growth rate compared with the control group. Diets containing 15% or 45% cassava did not affect these indices and did not cause hematological changes in tambaqui juveniles, indicating that some amount of cassava can be used as an alternative energy source for this important aquaculture... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Teleosts; Growth; Feed evaluation; Stress; Blood. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000601697 |
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| Adamante,W.B.; Nuñer,A.P.O.; Barcellos,L.J.G.; Soso,A.B.; Finco,J.A.. |
| The stress in dorado fingerlings (Salminus brasiliensis) caused by transportation at densities of 5, 10, and 15g/l after 4, 8, and 12h was evaluated by the concentration of tissue cortisol measured by ELISA. The conditions of transportation were simulated on an orbital table shaker with horizontal movements, inside 15 litres plastic bags filled with 4 litres of water and pure oxygen. Cortisol concentrations increased in all densities after 4h of transportation converging to a common concentration at the end of the tested times. Electrical conductivity of water increased with density and transportation time. The transportation caused stress on fish, but the increase on density and in times of transportation did not cause mortality to fingerlings. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Salminus brasiliensis; Fish; Stress; Transportation; Cortisol. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352008000300034 |
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| Ferraz,M.C.; Matos,A.V.R.; Prestes,N.C.; Ferreira,J.C.P.; Francelino,L.C.; Cunha,F.S.; Oba,E.. |
| Callithrix jacchus is a neotropical primate adaptable in captivity. Colonies can be easily established in a short time and at low cost compared to other species of larger primates, which are normally used in laboratory. Because they are phylogenetically similar to humans in situations that induce anxiety, these small primates are increasingly being used in research involving the stress response. Wild animals in captivity are subjected to a series of stressful events that depending on the duration and intensity can modify the organic homeostasis. Observed in this study, serious problems occurred with the formation in fetal offspring of Callithrix jacchus kept in an environment with a high degree of stress. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Callithrix jacchus; Stress; Cortisol; Formation fetal. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000501401 |
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| Bueno,A.R.; Rasby,R.; Clemens,E.T.. |
| Seventy-five Angus x MARC II crossbred heifers were used to assess the effects of age at weaning on calf performance and blood constituents. Calves were weaned at 150, 210, or 270 days of age with comparisons made to their non-weaned counterparts. Changes in blood chemistry and hematology (cortisol, glucose, T3, total proteins, packed cell volume and the differential white blood cell count) were recorded on the day of weaning (day-0), and at 2, 7, 14, and 28 days post-weaning. Calves weaned at 210 days of age presented the highest plasma cortisol, glucose, and total protein concentrations during their early post-weaning period. Calves weaned at 150 days of age had significantly lower plasma T3 values. Packed cell volume and differential white blood cell... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle; Weaning; Stress; Blood constituents. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352003000100001 |
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| Costa,Â.A.P.; Roubach,R.; Dallago,B.S.L.; Bueno,G.W.; McManus,C.; Bernal,F.E.M.. |
| RESUMO A intensificação da produção de tilápias pode gerar implicações negativas sobre o desempenho e o bem-estar dos peixes. Assim, é essencial determinar a densidade correta para otimizar a produção. O objetivo deste estudo foi avaliar o desempenho e o bem-estar de tilápias-do-nilo (Oreochromis niloticus) juvenis, com peso inicial médio de 30g (± 2,70), criadas em três diferentes densidades de estocagem, em gaiolas de flutuação. Os peixes foram alimentados três vezes/dia, com ração contendo 32% de proteína bruta, durante 74 dias. O desenho experimental foi completamente ao acaso, com três tratamentos (250 peixes/m3, 350 peixes/m3 e 450 peixes/m3) e quatro réplicas. Os parâmetros físico-químicos da água foram monitorados durante o experimento. A elevação... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal welfare; Aquaculture; Biomass; Cortisol; Stress. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000100243 |
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| Assis,V.D.L.; Carvalho,T.S.G.; Pereira,V.M.; Freitas,R.T.F.; Saad,C.E.P.; Costa,A.C.; Silva,A.A.A.. |
| ABSTRACT This study evaluated the influence of physical environmental enrichment on the behavior of cockatiels (Nymphicus hollandicus). Eighteen birds, nine males and nine females, were monitored in environments enriched with wooden sticks and bead rings and in non-enriched environments, in a completely randomized design. Behavioral categories were grouped into locomotion, maintenance, rest, feed, undesirable activities, and interaction with environmental enrichment. Data were analyzed using descriptive analysis of behaviors to produce the ethogram and percentage comparison of frequency values for behavior analysis. Environmental enrichment positively influenced behavioral categories and some behavioral activities of birds. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ethogram; Parrot; Stress; Wild animal. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000300562 |
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| Registros recuperados: 187 | |
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