Consulta: subjectFacets:"Oncorhynchus mykiss"
Registros recuperados: 19
Data/hora: 04/06/2024 03:51:01

Impact of rainbow trout on aquatic invertebrate communities in subtropical mountain streams of northwest Argentina
Provedor de dados: 67
Autores: Molineri,Carlos.
The present study was conducted to assess the effect of rainbow trout introduction on benthic invertebrate communities, stratified as epibenthos and infauna. Two main questions are explored: 1) do the trout-invaded streams show a different community structure than the streams with autochthonous fish?, and 2) does the presence of trout affect differentially the epibenthos and the infauna? Epibenthic and infaunal samples, drift samples and fish stomach content were sampled four times from three stations to assess the impact of rainbow trout (Oncorhynchus mykiss) on the invertebrate aquatic fauna. Only one species of native fish was recorded in the studied sites, the siluriform Trichomycterus corduvense. Both fish species were found always in allopatry. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Benthos; Macroinvertebrates; Introduced species; Oncorhynchus mykiss; Trichomycterus corduvense.
Ano: 2008
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2008000100008

The spawning migration of anadromous rainbow trout in the Santa Cruz River, Patagonia (Argentina) through radio-tracking
Provedor de dados: 67
Autores: Riva Rossi,Carla; Arguimbau,Milagros; Pascual,Miguel.
Adult anadromous rainbow trout (Oncorhynchus mykiss) from the Santa Cruz River were implanted with radio-transmitters in May 2000 as they ascended the river from the ocean to locate spawning areas, assess the range and timing of the spawning migration, and determine the composition of the spawning populations. Radio-tagged fish revealed geographic and temporal migration patterns and previously unidentified spawning areas. Telemetry data indicated that anadromous fish dwell and spawn in the main stem river. Range of the total detected upstream migration varied between 2-280 km. Spawning begins by mid winter and peaks in the spring, matching the raise in water temperature, which ranged from 4ºC at the beginning of the spawning season to 10ºC at the end of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oncorhynchus mykiss; Steelhead; Anadromy; Residency; Radio-telemetry; Surgical implantation.
Ano: 2003
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2003000200004

COMPOSICION DE LA DIETA DE ONCORHYNCHUS MYKISS (WALBAUM 1792) (PISCES: SALMONIDAE) EN UN SISTEMA FLUVIAL DE BAJA INTERVENCION ANTROPICA: ESTERO NONGUEN, VIII REGION, CHILE
Provedor de dados: 72
Autores: Palma,Alejandro; Figueroa,Ricardo; Ruiz,Víctor H.; Araya,Elizabeht; Berríos,Patricia.
Se estudió la dieta alimentaria de Oncorhynchus mykiss (Walbaum 1792) en un ecosistema fluvial con baja intervención antrópica determinando si hay correspon-dencia entre los ítemes consumidos por el pez y la oferta alimentaria. El área de estudio corresponde al estero Nonguén, una subcuenca costera tributaria del curso inferior del río Andalién (36° 49' a 36° 54'S; 72° 57' a 73° 01'W), que con una orientación general de sur a norte, recorre una distancia de más de 15 km dando forma a una cuenca de 44 km² de superficie. El estudio fue abordado mediante pesca eléctrica en dos períodos estacionales: invierno y primavera. Para ello se definió una secuencia lineal de 5 estaciones de muestreos localizadas en los sectores de ritrón y potamón en los primeros 5...
Tipo: Journal article
Palavras-chave: Oncorhynchus mykiss; Dieta; Estero Nonguén; VIII Región; Chile.
Ano: 2002
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382002000200007

Otolith growth in trout Oncorhynchus mykiss: supply of Ca2+ and Sr2+ to the saccular endolymph
Provedor de dados: 5
Autores: Payan, P; Borelli, G; Priouzeau, F; De Pontual, Helene; Boeuf, G; Mayer Gostan, N.
Kinetic and pharmacological characteristics of Ca2+ fluxes across the saccular epithelium of trout were studied using a perfused isolated inner ear. Ca-45(2+) influx from the Ringer solution to the endolymph was 3-4 nmoles h(-1) mu(-1) endolymph, which corresponds to a global turnover rate of the endolymph calcium of 200% h(-1). Ca2+ entry into the proximal endolymph was faster than into the distal fluid. Net Ca2+ movement across the saccular epithelium depended on the direction and intensity of the chemical gradient of calcium between the Ringer solution and the endolymph. Increasing the calcium concentration in the Ringer solution up to 4.4 mmol l(-1) provoked an accumulation of Ca2+ in both proximal and distal endolymphs, and equilibrium was reached...
Tipo: Text
Palavras-chave: Inner ear; Perfusion; Otolith; Endolymph; Flux; Calcium; Oncorhynchus mykiss; Trout.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-416.pdf

Voluntary feed intake and discrimination of diets containing a novel fluoroquinolone in self-fed rainbow trout
Provedor de dados: 5
Autores: Boujard, Thierry; Le Gouvello, Raphaela.
The objective of the study was to evaluate the capacity of rainbow trout to discriminate diets containing micro-granulated or powdered novel fluoroquinolone in comparison with a positive (containing sulfamerazine sodium) and a negative control (placebo). In a first trial, groups of trout had access to a self-feeder containing the placebo feed for 10 days, and then to one of the four feeds during another period of 10 days. Fish reduced their voluntary feed intake (VFI) by more than 50 % when they had access to the positive control, and by more than 20 % when they had access to feed containing micro-granulated premix. There was no significant decrease in VFI when the fish had access to feed containing powdered premix, but in this latter case, an increase in...
Tipo: Text
Palavras-chave: Truite arc-en-ciel; Distributeurs à la demande; Appétit; Acceptabilité; Antibiotiques; Oncorhynchus mykiss; Rainbow trout; Self-feeding; Voluntary feed intake; Antibiotics.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00335/44651/57341.pdf

Assessment of Genetic Variability of Fish Personality Traits using Rainbow Trout Isogenic Lines
Provedor de dados: 5
Autores: Millot, Sandie; Pean, Samuel; Labbe, Laurent; Kerneis, Thierry; Quillet, Edwige; Dupont-nivet, Mathilde; Begout, Marie-laure.
The study of inter-individual variability of personality in fish is a growing field of interest but the genetic basis of this complex trait is still poorly investigated due to the difficulty in controlling fish genetic origin and life history. When available, isogenic lines that allow performing independent tests on different individuals having identical genotype constitute a very relevant experimental material to disentangle the genetic and environmental components of behavioural individuality. We took advantage of heterozygous isogenic lines to investigate the personality in rainbow trout through the analysis of their reactions to different experimental situations. To this end, seven to ten rainbow trout isogenic lines were screened for their spatial...
Tipo: Text
Palavras-chave: Personality; Isogenic lines; Genetic variability; Risk taking; Spatial exploration; Oncorhynchus mykiss.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00194/30496/29976.pdf

Hepatic phosphoenolpyruvate carboxykinase gene expression is not repressed by dietary carbohydrates in rainbow trout (Oncorhynchus mykiss)
Provedor de dados: 5
Autores: Panserat, Stéphane; Plagnes Juan, E; Breque, Jeanine; Kaushik, Sadasivam.
Phosphoenolpyruvate carboxykinase (PEPCK) is a rate-limiting enzyme in hepatic gluconeogenesis and therefore plays a central role in glucose homeostasis. The aim of this study was to analyse the nutritional regulation of PEPCK gene expression in rainbow trout (Oncorhynchus mykiss), which are known to use dietary carbohydrates poorly. A full-length hepatic PEPCK cDNA (2637 base pairs with one open reading frame putatively encoding a 635-residue protein) was cloned and found to be highly homologous to mammalian PEPCKs. The presence of a putative peptide signal specific to a mitochondrial-type PEPCK in the deduced amino acid sequence suggests that this PEPCK gene codes for a mitochondrial form, In gluconeogenic tissues such as liver, kidney and intestine,...
Tipo: Text
Palavras-chave: Gluconeogenesis; Nutrition; Metabolism; Glucose; Oncorhynchus mykiss; Rainbow trout; Phosphoenolpyruvate carboxykinase.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-414.pdf

Effect of long-term feeding with a plant protein mixture based diet on growth and body/fillet quality traits of large rainbow trout (Oncorhynchus mykiss)
Provedor de dados: 5
Autores: De Francesco, Matilde; Parisi, Giuliana; Medale, Francoise; Lupi, Paola; Kaushik, Sadasivam; Poli, Bianca.
Two diets based oil fish meal (FM) or oil a mixture of plant protein sources supplemented with free amino acids (PP) were fed to rainbow trout having a mean initial body weight of 162.5 g reared at 17 +/- 1 degreesC for 24 weeks to evaluate the effect of plant protein sources oil fish growth, morphological and body quality traits. At the end of the growth study, samples were withdrawn for chemical analyses as well as measurements of different parameters of quality.   Compared to the FM group, the trout fed diet PP had lower growth rates (mean final body weight 663 vs. 800 g), feed efficiency (0.95 vs. 1.07) and protein efficiency ratio (1.96 vs. 2.13). Trout fed diet PP were also characterised by a lower dressed weight (89.45% vs. 91.07%), hepato-somatic...
Tipo: Text
Palavras-chave: Sensory evaluation; Chemical composition quality; Flesh; Body traits; Plant protein; Oncorhynchus mykiss.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-391.pdf

Reproduction uniparentale et polyploidie induites chez la truite arc-en-ciel (Oncorhynchus mykiss) et chez les bivalves Crassostrea gigas, Ruditapes philippinarum et Chlamys varia
Provedor de dados: 5
Autores: Diter, Alain.
Methods of gynogenesis, androgenesis and polyploidy induction were developed with the aim of genetic improvement in the rainbow trout, the Pacific oyster, the Manila clam and the black scallop. In the trout: · haploid androgenesis was induced by means of a pressure shock applied on diploid eggs, probably at the time of karyogamy. Diploid androgenetic individuals were directly produced from eggs fertilized with sperm from tetraploid male. · a heat shock treatment effective for suppressing the first egg mitosis was developed. This treatment allows the production of homozygous gynogenetic lines (checked using enzyme electrophoresis technique) from eggs inseminated with ultraviolet irradiated sperm. The treatment also induced tetraploidy in eggs normally...
Tipo: Text
Palavras-chave: Méthode induction gynogenèse; Androgenèse; Polyploïdie; Oncorhynchus mykiss; Crassostrea gigas; Ruditapes philippinarum; Chlamys varis; Génétique; Methods of gynogenesis; Androgenesis; Polyploidy; Oncorhynchus mykiss; Crassostrea gigas; Ruditapes philippinarum; Chlamys varis; Genetic.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00210/32097/30553.pdf

How to assess fin damage in rainbow trout, Oncorhynchus mykiss?
Provedor de dados: 5
Autores: Person, Jeannine; Le Bayon, Nicolas; Gros, Sylvie.
Fin condition was examined in 100-500 g hatchery-reared rainbow trout sampled in a large range of environmental conditions of an experimental farm. A method that is simple to use, requires little training, and does not need costly sophisticated equipment or reference to a model is proposed to assess fin erosion (defined as a decrease in size and profile alteration of fins). A procedure to reliably measure the length of the longest ray present in two selected fins (dorsal and pectoral) is described. Fin general profile is assessed using five levels of erosion based on the precise rank of intact or eroded rays to limit subjective bias. The suitability of the two descriptors of fin erosion under laboratory, farm or field conditions is discussed.
Tipo: Text
Palavras-chave: Fin erosion; Oncorhynchus mykiss; Rainbow trout.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2585.pdf

The combined effects of feeding time and dietary fat levels on feed intake, growth and body composition in rainbow trout
Provedor de dados: 5
Autores: Gelineau, Anne; Bolliet, Valérie; Corrraze, Geneviève; Boujard, Thierry.
The combined effects of feeding time (morning and evening) and dietary fat concentration on feed intake, growth, body composition and lipid tissue distribution were examined in rainbow trout fed on demand. To that purpose, diets with low (LE, 6% lipid) or high energy concentrations (HE, 24% lipid) were used in four treatments that combined provision of the same (HE-HE or LE-LE) or different (HE-LE, LE-HE) diets at morning and evening meals. Digestible energy intakes of the LE-HE (229 U kg(-1) d(-1)) and HE-HE (269 U kg(-1) d(-1)) groups were significantly different. There was no significant difference in the amount of energy intake between the two meals of the day in any of the treatments. The main effect of dietary treatment was on lipid intake; fish in...
Tipo: Text
Palavras-chave: Oncorhynchus mykiss; Body composition; Feed intake; Growth; Lipid; Feeding time.
Ano: 2002
URL: https://archimer.ifremer.fr/doc/2002/publication-1398.pdf

Nutritional regulation and tissue specificity of gene expression for proteins involved in hepatic glucose metabolism in rainbow trout (Oncorhynchus mykiss)
Provedor de dados: 5
Autores: Panserat, Stéphane; Plagnes Juan, E; Kaushik, Sadasivam.
Rainbow trout (Oncorhynchus mykiss) are known to use dietary carbohydrates poorly. One of the hypotheses to explain the poor utilisation of dietary glucose by these fish is a dysfunction in nutritional regulation of hepatic glucose metabolism. In this study, we obtained partial clones of rainbow trout cDNAs coding for a glucose transporter (Glut2), and for the enzymes 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase (6PF-2K/F-2,6BPase), fructose-1,6-bisphosphatase (FBPase) and pyruvate kinase (PI(), Their deduced amino acid sequences were highly similar to those of mammals (up to 80% similarity), In a study of nutritional regulation, the Glut2 gene was highly expressed in the liver irrespective of the nutritional status of the trout, in agreement with...
Tipo: Text
Palavras-chave: Oncorhynchus mykiss; Trout; Bifunctional enzyme; Pyruvate kinase; Fructose bisphosphatase; Glucose transporter; Glucose metabolism; Liver metabolism.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-415.pdf

Ionic composition of endolymph in teleosts: Origin and importance of endolymph alkalinity
Provedor de dados: 5
Autores: Payan, P; Kossmann, Hans; Watrin, A; Mayer-gostan, N; Boeuf, Gilles.
Ionic (Na+, K+, Cl-, PO43-, pH), total CO2, total calcium and protein concentrations in the plasma and endolymph of the inner ear were compared in trout Oncorhynchus mykiss and turbot Scophthalmus maximus. In both species, saccular endolymph was characterized by high levels of K+ and total CO2 and in trout by an alkaline pH, The kinetic characteristics of proton secretion across the saccular epithelium of trout were investigated using a titration technique in which isolated saccules were mounted as closed sacs. The rate of proton secretion depends strongly on the pH of the Ringer's solution and secretion stops at a pH below 7.2, Proton secretion is driven by an energy-dependent mechanism involving basolateral ouabain-sensitive Na+/K+ exchangers. Proton...
Tipo: Text
Palavras-chave: Teleost; Inner ear; Saccular epithelium; Proton secretion; Otolith; Biocalcification; Trout; Oncorhynchus mykiss; Turbot; Scophthalmus maximus.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00336/44695/44987.pdf

Comparison of brown trout (Salmo trutta) reared in fresh water and sea water to freshwater rainbow trout (Oncorhynchus mykiss): II. Phosphorus balance
Provedor de dados: 5
Autores: Dosdat, Antoine; Metailler, Robert; Desbruyeres, Elisabeth; Huelvan, Christine.
Brown trout and rainbow trout (average weight 100 g) were reared in fresh water at 12 degrees C under the same conditions before transferring brown trout to sea water, in order to compare phosphorus utilisation in both species. Apparent phosphorus availability, orthophosphate excretion and phosphorus accretion in the fish were directly determined. Thus, actual phosphorus mass balance was built. Rainbow trout raised in fresh water had a higher phosphorus retention coefficient (maximum 50 %) than brown trout reared in fresh water (maximum 45 %). Transferring brown trout to sea water induced a reduction in phosphorus retention (maximum 39 %), Orthophosphate excretion, ranging 7-20 mg phosphorus per kg wet weight per day, represented 10-20 % of ingested...
Tipo: Text
Palavras-chave: Oncorhynchus mykiss; Salmo trutta; Excrétion; Digestibilité; Phosphore; Oncorhynchus mykiss; Salmo trutta; Excretion; Digestibility; Phosphorus intake.
Ano: 1998
URL: https://archimer.ifremer.fr/doc/1998/publication-876.pdf

Modeling the weight gain of freshwater-reared rainbow trout ( Oncorhynchus mykiss ) during the grow-out phase
Provedor de dados: 96
Autores: Janampa-Sarmiento,Peter Charrie; Takata,Rodrigo; Freitas,Thiago Mendes de; Freire,Licius de Sá; Pereira,Marcelo Menezes de Britto; Lugert,Vincent; Heluy,Guilherme Melgaço; Pereira,Marcelo Maia.
ABSTRACT We used five nonlinear models to calculate the weight gain of rainbow trout (122.11±15.6 g) during the final grow-out phase of 98 days under three different feed types (two commercials diets, A and B, and one experimental diet, C) in triplicate groups. We fitted the von Bertalanffy growth function with allometric and isometric scaling coefficient, Gompertz, Logistic, and Brody functions to weight (g) at age data of 900 fish, distributed in nine tanks. The equations were fitted to the data based on the least squares method using the Marquardt iterative algorithm. The accuracy of the fitted models was evaluated using a model performance metrics, combining mean squared residuals (MSR), mean absolute error (MAE), and Akaike’s Information Criterion...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Logistic model; Non-linear equations; Oncorhynchus mykiss.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982020000100200

Hematologia comparada entre diplóides e triplóides de truta arco-íris, Oncorhynchus mykiss walbaum (Pisces, Salmonidae)
Provedor de dados: 104
Autores: Ranzani-Paiva,Maria José Tavares; Tabata,Yara Aiko; Eiras,Augusta Cocuzza das.
This Study was carried out at the Salmoniculture Experimental Station "Dr. Ascanio de Faria", in Campos do Jordão, São Paulo. Brazil. The aim was to compared the hematology of triploid and diploid rainbow trout, Oncorhynchus mykiss Walbaum, 1792, by sex and gonadal maturation stages. Blood was obtained from 144 individuais for determinati-ons of: haemoglobin rate (Hb), haematocrit (Ht), erythrocyte count (Er), mean corpuscular volume (MCV), mean corpuscular haemoglobin (MHC), mean corpuscular hemoglobin concentration (MCHC), and differential leucocyte counts. The ploid was determinated by measuring the erythrocyte major axis, in fresh and stainncd smears. Triploid rainbow trout had a large eiythrocyte diameter, mean erythrocyte volume and mean haemoglobin...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oncorhynchus mykiss; Diploid; Triploid; Hematolology; Rainbow trout.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000400026

Effects of black seed (Nigella sativa), ginger (Zingiber officinale) and cone flower (Echinacea angustifolia) on the immune system of rainbow trout, Oncorhynchus mykiss
Provedor de dados: 45
Autores: Fadeifard,F.; Raissy,M.; Jafarian,M.; Boroujeni,H.Rouhi; Rahimi,M.; Faghani,M.
ABSTRACT This study was carried out to evaluate the effects of dietary essential oils of ginger (Zingiber officinale), black seed (Nigella sativa) and cone flower (Echinacea angustifolia) on the immune system of cultured rainbow trout, Oncorhynchus mykiss. A total of 360 fish were divided into 4 groups and 3 replicates each containing 30 fish. The fish were fed for 21 days with 1% of the herbal essential oils and with unsupplemented diet as the control group. Haematological and immune parameters including serum lysozyme, number of phagocytic bacteria, Hb, PCV, MCV, MCH, MCHC, number of RBC and WBC were studied. Treatments recorded enhancement in immune parameters compared to the control group. Significantly higher serum lysozyme level and phagocytic germs...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nigella sativa; Zingiber officinale; Echinacea angustifolia; Immune response; Oncorhynchus mykiss.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000100199

Cryopreservation of semen from functional sex-reversed genotypic females of the rainbow trout, Oncorhynchus mykiss
Provedor de dados: 52
Autores: Ninhaus-Silveira,Alexandre; Foresti,Fausto; Tabata,Yara Aiko; Rigolino,Marcos Guilherme; Veríssimo-Silveira,Rosicleire.
Cryopreservation of semen from sex-reversed females of rainbow trout aims at rationalizing the production of stocks composed by 100% females. Semen from normal males (M) and two types of genotypic females (R and G), sex-reversed by the oral administration of 17alpha-methyltestosterone, were used. R was obtained by the fertilization of normal eggs with semen of sex-reversed females while G via gynogenetic reproduction. Semen was diluted in an extender solution (glucose 5,4 g, egg yolk 10 ml, dimetil sulfoxide 10 ml, water 80 ml) at 1:3 ratio (semen/extender), stored in straws of 0.5 ml and freezed in a dry container Cryopac CP-65, at -180ºC. Thawing was performed with water at 70ºC for 3 seconds. There were no significant fertilization rate differences...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oncorhynchus mykiss; Cryopreservation; Sex reversal; Gynogenesis; Semen.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000100009

Body composition and sensory quality of wild and farmed brown-trout (Salmo trutta) and of farmed rainbow-trout (Oncorhynchus mykiss)
Provedor de dados: 65
Autores: Antão-Geraldes,Ana Maria; Hungulo,Sílvia Rafael; Pereira,Etelvina; Teixeira,Amílcar; Teixeira,Alfredo; Rodrigues,Sandra.
ABSTRACT:  Body composition (total crude protein, lipid, ash, dry matter and moisture) and fatty acid profiles were compared between wild and farmed brown trout and between farmed rainbow trout. Farmed brown trout contained the highest amount of crude protein (18.39%), whereas farmed rainbow trout contained higher levels of crude lipid (2.35%). Thirty six fatty acids were found, including sixteen saturated fatty acids (SFA), nine monounsaturated fatty acids (MUFA) and eleven polyunsaturated fatty acids (PUFA). The most abundant SFA in all fish were palmitic acid and stearic acid. However, the most abundant fatty acids in all trout samples were MUFA and PUFA. MUFA were the most abundant fatty acid in farmed brown trout because of high abundance of oleic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salmo trutta; Oncorhynchus mykiss; Body composition; Fatty acid composition; Sensory quality.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000900752