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| Registros recuperados: 96 | |
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| Person, Jeannine; Lamers, A; Le Roux, Annick; Severe, Armelle; Boeuf, Gilles; Mayer Gostan, N. |
| Turbot juveniles were exposed to four ammonia concentrations [0.17 (L), 0.34 (M), 0.73 (MH) and 0.88 (H) mgl(-1) NH3-N] for different exposure durations (28 days minimum to 84 days). Their physiological status and growth performances were compared to a control group [0.004 (C) mgl(-1) NH3-N]. No growth was observed in the H group, and by day 57, mass increase in the MH group was only 15% of that in group C. During the first month growth in the L group was similar to that in control group while it was lower (33%) in the M group; afterwards the L and M groups had a similar growth (half that of controls). Accumulation of total ammonia nitrogen (TA-N) in plasma was dependent on ambient ammonia concentrations. Plasma urea levels in ammonia-exposed fish were... |
| Tipo: Text |
Palavras-chave: Urea; Total ammonia nitrogen; Scophthalmus maximus; Ion regulation; Cortisol; Chronic toxicity. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/publication-618.pdf |
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| Shirangi, Sa; Kalbassi, Mr; Khodabandeh, S; Lignot, Jh. |
| The freshwater shrimp, Macrobrachium nipponense is an invasive species which has recently been reported in Anzali Wetland, Iran. It exhibited good tolerance and adaption in this wetland ecosystem. This study examined certain aspects of feeding of M. nipponense in three habitats of this wetland. Shrimps were randomly sampled from April 2016 to March 2017. The stomach contents were obtained from 367 specimens ranging in length from 4.2 cm to 6.9 cm. The empty stomach index (VI) showed that this shrimp was a voracious (0 ≤ VI < 20) species in all seasons expect winter, when 99% of the specimens had empty stomachs. Fourteen dietary items were categorized in the three habitats of the wetland, with phytoplankton, mollusks and detritus forms being the dominant... |
| Tipo: Text |
Palavras-chave: Persian sturgeon; Cortisol; Salinity tolerance; Osmotic improvement; Chloride cell. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00490/60187/63529.pdf |
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| Kiilerich, Pia; Servili, Arianna; Peron, Sandrine; Valotaire, Claudiane; Goardon, Lionel; Leguen, Isabelle; Prunet, Patrick. |
| This study aims to shed light on corticosteroid regulation of stress in teleost fish with focus on the corticosteroid signalling system. The role of the mineralocorticoid-like hormone 11-deoxycorticosterone (DOC) in fish is still enigmatic, as is the function of the mineralocorticoid receptor, MR. Low plasma DOC levels and ubiquitous tissue distribution of MR question the physiological relevance of the mineralocorticoid-axis. Furthermore, the particular purpose of each of the three corticosteroid receptors in fish, the glucocorticoid receptors, GR1 and GR2, and the MR, is still largely unknown. Therefore we investigate the regulation of cortisol and DOC in plasma and mRNA levels of MR, GR1 and GR2 in the HPI-axis tissue (hypothalamus, pituitary and... |
| Tipo: Text |
Palavras-chave: Stress; Rainbow trout; Confinement; Cortisol; DOC; MR; GR1; GR2; HPI-axis. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00396/50737/51439.pdf |
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| Sadoul, Bastien; Geffroy, Benjamin. |
| Stress in teleosts is an increasingly studied topic because of its interaction with growth, reproduction, immune system and ultimately fitness of the animal. Whether it is for evaluating welfare in aquaculture, adaptive capacities in fish ecology, or to investigate effects of human‐induced rapid environmental change, new experimental methods to describe stress physiology in captive or wild fish have flourished. Cortisol has proven to be a reliable indicator of stress and is considered the major stress hormone. Initially principally measured in blood, cortisol measurement methods are now evolving towards lower invasiveness and to allow repeated measurements over time. We present an overview of recent achievements in the field of cortisol measurement in... |
| Tipo: Text |
Palavras-chave: Aquaculture; Cortisol; Glucocorticoids; Non-invasive; Stress; Welfare. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00478/59001/61616.pdf |
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| Benhaim, David; Begout, Marie-laure; Pean, Samuel; Manca, Michael; Prunet, Patrick; Chatain, Beatrice. |
| Replacing aquaculture feeds based on fisheries-derived resources with plant-based diets could be a relevant strategy to improve the sustainability of aquaculture. Recent studies on sea bass have shown that the total and early replacement of marine products by plant products would have a moderate effect on fish growth and body lipid content. Whether a plant-based diet impacts behavioural and physiological traits possibly linked to fish welfare, is not known, however. Here, we studied the effect of a totally plant-based diet introduced at an early stage of sea bass development on self-feeding behaviour, learning ability in a T-maze and stress biomarkers. We first compared learning processes in self-feeding conditions, between naive fish fed a plant-based... |
| Tipo: Text |
Palavras-chave: Self-feeder; Plant-based diet; Learning; Exploratory behaviour; Cortisol; Dicentrarchus labrax. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00152/26309/24381.pdf |
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| Geffroy, Benjamin; Sadoul, Bastien; Bouchareb, Amine; Prigent, Sylvain; Bourdineaud, Jean-paul; Gonzalez-rey, Maria; Morais, Rosana N.; Mela, Maritana; Carvalho, Lucelia Nobre; Bessa, Eduardo. |
| Nature-based tourism is gaining extensive popularity, increasing the intensity and frequency of human-wildlife contacts. As a consequence, behavioral and physiological alterations were observed in most exposed animals. However, while the majority of these studies investigated the effects of punctual exposure to tourists, the consequences of constant exposition to humans in the wild remains overlooked. This is an important gap considering the exponential interest for recreational outdoor activities. To infer long-term effects of intensive tourism, we capitalized on Odontostilbe pequira, a short-lived sedentary Tetra fish who spends its life close to humans, on which it feeds on dead skin. Hence, those fish are constantly exposed to tourists throughout their... |
| Tipo: Text |
Palavras-chave: Coping style; Ecotourism; Conservation; Behavior; Gene expression; Cortisol; Neurogenesis; Fish. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00423/53470/54366.pdf |
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| Silva,J.H.; Quiroga,M.A.; Landa,R. |
| En la bibliografía consultada, la retención placentaria en la vaca lechera fue relacionada con una menor infiltración de neutrófilos en los placentomas, debido fundamentalmente a la elevada cortisolemia durante el parto que disminuiría la actividad de neutrófilos sanguíneos. Asimismo, la hipocalcemia disminuiría la actividad leucocitaria, mientras que la hipomagnesemia la incrementaría. Para profundizar esos estudios, se utilizaron 100 vacas Holando Argentino, preñadas. De cada animal se obtuvieron muestras de sangre, durante: a) el pre-parto, b) el pos-parto inmediato y c) a los siete días pos-parto. Se determinó: concentración de leucocitos; porcentajes de neutrófilos y de linfocitos circulantes; calcemia, magnesemia y además, en b), cortisolemia. Como... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Retención placentaria; Leucocitos; Cortisol; Calcio; Magnesio. |
| Ano: 2016 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1668-34982016000100008 |
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| MURTHY,K. R. KRISHNA. |
| Death caused by scorpion envenoming (Buthidae family) is a common event in tropical and subtropical countries. Severe scorpion envenoming causes an autonomic storm resulting in a massive release of catecholamines, angiotensin II, glucagon, cortisol, and changes in insulin secretion. As a consequence of these changes in the hormonal milieu, scorpion envenoming results in a syndrome of fuel energy deficits and an inability of the vital organs to utilize the existing metabolic substrates, which causes myocardial damage, cardiovascular disturbances, peripheral circulatory failure, pulmonary oedema, and many other clinical manifestations alone or in combination, producing multi-system-organ-failure (MSOF) and death. Insulin-glucose infusion or antivenom... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Catecholamines; Angiotensin II; Glucagon; Cortisol; Insulin; Myocardial damage; Cardiovascular disturbances; Peripheral circulatory failure; Pulmonary oedema; Multi-system-organ-failure (MSOF). |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79302000000100002 |
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| RADHA KRISHNA MURTHY,K.; HAGHNAZARI,L.. |
| Severe envenoming was induced in two groups of experimental dogs after subcutaneous (SQ) injection of venom of the scorpion (Mesobuthus tamulus concanesis, Pocock) (3.0 and 3.5 mg/kg body weight). The circulating levels of blood sugar, insulin, glucagon, and cortisol were assayed at 0, and 30, 60, 90 and 120 min after venom injection. There was an increase in the circulating levels of blood sugar, insulin, glucagon, and cortisol following envenoming. Scorpion envenoming causes an autonomic storm resulting in a massive release of catecholamines, angiotensin II, glucagon, and cortisol accompanied by changes in insulin secretion. The rise in the counter-regulatory hormones (glucagon, cortisol, and catecholamines) oppose the anabolic actions of insulin... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Scorpion envenoming; Insulin; Glucagon; Cortisol; Mesobuthus tamulus concanesis. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79301999000100004 |
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| Reis,LSLS; Chiacchio,SB; Oba,E; Pardo,PE; Frazatti-Gallina,NM. |
| This study determined the correlation between serum cortisol levels and rabies antibody titers in cattle primo-vaccinated against rabies and supplemented with dietary selenium (Se). Sixty Nelore male calves (10 to 12 months old) received daily and individual dietary supplementation with 0, 3.6, 5.4 and 6.4 mg Se (groups Gc, G3.6, G5.4 and G6.4, respectively). The animals were vaccinated against rabies (day 0) and subjected to handling stress in the corral for 120 days. Blood sampling procedures were performed on days 0, 15, 30, 60, 90 and 120. Cortisol levels increased until day 90, but had dropped significantly by day 120 (P < 0.01). Rabies antibody titers on days 30 and 90 were similar among Se-supplemented groups; in the control group, rabies... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Cattle; Cortisol; Stress; Rabies immune response; Selenium supplementation. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992009000400015 |
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| Alonso,Felipe; Cánepa,Maximiliano; Moreira,Renata Guimarães; Pandolfi,Matías. |
| In this work we describe for the first time the social and reproductive behavior of the Neotropical fish Cichlasoma dimerus (Heckel, 1840) [Perciformes: Cichlidae], endemic to the Paraná River basin, using a comprehensive-integral approach, including morphological and physiological features. This substrate breeding fish has biparental care of the fry and presents a dominance hierarchy that determines access to breeding territories among males, and to males with territories among females. Gregarious behavior associated with a pale body color, was observed before reproductive behaviors started. Afterwards, a dominance hierarchy was established through aggressive interactions. Territorial individuals had bright body color patterns and non territorial an... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cichlidae; Cortisol; Gonadosomatic index; Gonadotropins; Somatolactin. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000300009 |
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| Souza,Carine de Freitas; Salbego,Joseânia; Gressler,Luciane T.; Golombieski,Jaqueline I.; Ferst,Juliana G.; Cunha,Mauro A.; Heinzmann,Berta M.; Caron,Braulio O.; Glanzner,Werner G.; Gonçalves,Paulo B. D.; Baldisserotto,Bernardo. |
| ABSTRACT The aim of this study was to evaluate the effect of the essential oil of Lippia alba (EOLA) as a feed additive on ionoregulatory and metabolic parameters and pituitary hormones expression in silver catfish, Rhamdia quelen , submitted to a stressful condition (stocking density of 10.6 kg m-3 and limited space). Fish were fed with different concentrations of EOLA (0.0 - control, 0.25 and 0.50 mL kg food-1) for 20 days. Metabolic parameters were not affected by the diet, with the exception of alanine aminotransferase, which was higher in the liver of fish fed 0.50 mL EOLA kg food-1. Plasma ions and activity of H+-ATPase did not change, but fish fed 0.25 mL EOLA kg food-1 presented higher Na+/K+-ATPase activity. Somatolactin expression in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cortisol; Enzymatic activity; Growth hormone; Somatolactin. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000400707 |
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| Abreu,Janessa S.; Brinn,Richard P.; Gomes,Levy C.; McComb,Dawn Michelle; Baldisserotto,Bernardo; Zaiden,Sérgio F.; Urbinati,Elisabeth C.; Marcon,Jaydione L.. |
| We investigated the use of beta 1,3 glucan as an imunostimulant during a transport experiment to determine the effects upon the stress response of the pencilfish (Nannostomus trifasciatus). Pencilfish were fed for seven days with different concentrations of beta 1,3 glucan: 0.0% (control); 0.01%; 0.1% and 0.5% of beta 1,3 glucan per kg of feed-1. Fish were then transported for 24 hours by boat from Barcelos to Manaus. The highest dose of beta 1,3 glucan in the food increased Na+influx after 12 hours of transport and 0.1 and 0.5% beta 1,3 glucan maintained the flux of both ions close to zero at 24 hours. All doses of beta 1,3 glucan reduced K+ loss significantly in the beginning of the transport, but after 12 to 24 hours did not. No significant differences... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cortisol; Immunostimulant; Ion fluxes; Ornamental fish; Rio Negro basin. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000300623 |
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| Souza,Carine de Freitas; Baldissera,Matheus Dellaméa; Salbego,Joseânia; Lopes,Jane Mello; Vaucher,Rodrigo de Almeida; Mourão,Rosa Helena Veras; Caron,Braulio O.; Heinzmann,Berta Maria; Silva,Lenise Vargas Flôres da; Baldisserotto,Bernardo. |
| ABSTRACT The aim of this study was to evaluate if Lippia alba has different chemotypes according to the chemical composition of the essential oil (EO) considering collection site, and if the EO may have different effects on blood and plasma parameters in silver catfish, Rhamdia quelen, during and immediately after anesthesia. The citral (EO-C) and linalool (EO-L) chemotypes were identified, and both presented similar anesthetic effects for silver catfish. Fish were exposed to two concentrations of each EO, which induced slow and fast anesthesia (100 and 300 µL L-1, respectively). Blood ions did not change at any time of anesthesia induction and recovery and, therefore, the electrolyte balance was not altered. Blood gases oscillated through all exposure and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Blood gas; Cortisol; Glucose; Plasma ions; Silver Catfish. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000100203 |
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| Silva,Lenise de Lima; Garlet,Quelen Iane; Koakoski,Gessi; Abreu,Murilo Sander de; Mallmann,Carlos Augusto; Baldisserotto,Bernardo; Barcellos,Leonardo José Gil; Heinzmann,Berta Maria. |
| ABSTRACT The aim of this study was to evaluate the anesthetic activity of the essential oil (EO) of Ocimum americanum L. in silver catfish (Rhamdia quelen ). In the first experiment, the depressor effects and chemical composition of the leaf EO (LEO) and inflorescence EO (IEO) were compared. Juveniles (n = 10) were placed in aquaria containing different concentrations of EO (25 - 500 mg L-1) to determine the point at which anesthesia was induced and the length of the recovery period. In the following experiment, the effects of 300 and 500 mg L-1 LEO exposure on stress parameters (plasma cortisol, glucose and sodium levels) after air exposure for 1 min were assayed. Fish (n = 10 per sampling time) were sampled immediately or transferred to anesthetic-free... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anesthesia; Basil; Cortisol; Glucose; Sodium. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000400715 |
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| Carneiro,Paulo César Falanghe; Kaiseler,Pedro Henriques da Silva; Swarofsky,Elaine de Azambuja Correia; Baldisserotto,Bernardo. |
| Fish transportation is a common practice on fish farms and is considered to be a stressor that could negatively affect fish health. The objective of this study was to evaluate several physiological responses of stress in jundiá caused by transport at different loading densities. Jundiá juveniles were placed in plastic bags on a mechanical transport simulator for four hours at four different loading densities (75, 150, 250 and 350 g L-1) and then transferred to sixteen 80-L plastic boxes for 96 hours after transport. Water samples were collected before and after transport to measure dissolved oxygen, temperature, pH and ammonia levels. Blood samples were taken at departure and arrival, as well as at 24 and 96 hours after transport to monitor cortisol,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stress; Cortisol; Glucose; Ammonia. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000200021 |
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| TETSUKA, Masafumi; NISHIMOTO, Hiromi; MIYAMOTO, Akio; OKUDA, Kiyoshi; HAMANO, Seizo; 手塚, 雅文; 宮本, 明夫. |
| Glucocorticoids modulate ovarian function in cattle. However, their regulatory mechanisms have not been fully elucidated. In the present study, we examined gene expression of two glucocorticoid-metabolizing enzymes, a bidirectional 11β-HSD type 1 (11HSD1) and a dehydrogenase 11β-HSD type 2 (11HSD2), and glucocorticoid receptor (GR) in bovine follicles during follicular maturation and atresia. Granulosa cells (GCs) and theca interna layers (TIs) were harvested from follicles classified as small growing, dominant, preovulatory, early atretic and late atretic follicles. The expression levels of 11HSD1, 11HSD2 and GR mRNA were quantified by real-time PCR. In the healthy follicles, expression of 11HSD1 mRNA increased as follicles matured, both in GCs and TIs. A... |
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Palavras-chave: Bovine; Cortisol; 11β-HSD; Follicle; Glucocorticoid receptor; MRNA. |
| Ano: 2010 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2810 |
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| Registros recuperados: 96 | |
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