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Journal articles on the topic 'Juvenile rainbow trout'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Layhee, Megan J., Adam J. Sepulveda, Amy Shaw, Matthew Smuckall, Kevin Kapperman, and Alejandro Reyes. "Effects of Electric Barrier on Passage and Physical Condition of Juvenile and Adult Rainbow Trout." Journal of Fish and Wildlife Management 7, no. 1 (2016): 28–35. http://dx.doi.org/10.3996/042015-jfwm-039.

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Abstract Electric barriers can inhibit passage and injure fish. Few data exist on electric barrier parameters that minimize these impacts and on how body size affects susceptibility, especially to nontarget fish species. The goal of this study was to determine electric barrier voltage and pulse-width settings that inhibit passage of larger bodied rainbow trout Oncorhynchus mykiss (215–410 mm fork length) while allowing passage of smaller bodied juvenile rainbow trout (52–126 mm) in a static laboratory setting. We exposed rainbow trout to 30-Hz pulsed-direct current voltage gradients (0.00–0.45

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2

Hearn, William E., and Boyd E. Kynard. "Habitat Utilization and Behavioral Interaction of Juvenile Atlantic Salmon (Salmo salar) and Rainbow Trout (S. gairdneri) in Tributaries of the White River of Vermont." Canadian Journal of Fisheries and Aquatic Sciences 43, no. 10 (1986): 1988–98. http://dx.doi.org/10.1139/f86-244.

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Competition for space between stocked juvenile Atlantic salmon, Salmo salar, and wild juvenile rainbow trout, S. gairdneri, was examined in stream channel experiments, a field experiment, and in field habitat surveys. In stream channels providing riffle and pool habitats, species differed in their distribution both as underyearlings (0+) and as yearlings (1+). Yearling salmon occurred more often in stream channel riffles during trials with 1+ rainbow trout than during trials testing only salmon; trout distributions in the channels were unaffected by salmon. In a field experiment conducted to d

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3

Brown, Larry R., and Anne M. Brasher. "Effect of predation by Sacramento squawfish (Ptychocheilus grandis) on habitat choice of California roach (Lavinia symmetricus) and rainbow trout (Oncorhynchus mykiss) in artificial streams." Canadian Journal of Fisheries and Aquatic Sciences 52, no. 8 (1995): 1639–46. http://dx.doi.org/10.1139/f95-758.

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We studied the effects of predatory Sacramento squawfish (Ptychocheilus grandis) on habitat choice of juvenile California roach (Lavinia symmetricus), adult roach, and juvenile rainbow trout (Oncorhynchus mykiss) in artificial streams. In single-prey trials, the proportion of fish found in pool habitat declined in the presence of squawfish for juvenile roach (from 0.55 to 0.00), adult roach (from 0.88 to 0.13), and juvenile rainbow trout (0.70 to 0.15). The presence of squawfish did not affect the use of riffle and edge habitats. Of the fish found in shallow water, the proportion found in edge

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4

Seiler, Steven M., and Ernest R. Keeley. "Competition between native and introduced salmonid fishes: cutthroat trout have lower growth rate in the presence of cutthroat–rainbow trout hybrids." Canadian Journal of Fisheries and Aquatic Sciences 66, no. 1 (2009): 133–41. http://dx.doi.org/10.1139/f08-194.

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When nonnative species become established within new communities, competition may play a role in determining the persistence of ecologically similar native species. In western North America, many native cutthroat trout ( Oncorhynchus clarkii ) populations have been replaced by nonnative rainbow trout ( Oncorhynchus mykiss ). Superior competitive ability of rainbow trout and cutthroat–rainbow trout hybrids is often cited for this replacement; however, few studies have tested for mechanisms that might allow introduced rainbow trout to out-compete native trout species. Our previous work found ind

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Marr, J. C. A., H. L. Bergman, M. Parker, et al. "Relative sensitivity of brown and rainbow trout to pulsed exposures of an acutely lethal mixture of metals typical of the Clark Fork River, Montana." Canadian Journal of Fisheries and Aquatic Sciences 52, no. 9 (1995): 2005–15. http://dx.doi.org/10.1139/f95-792.

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Brown trout (Salmo trutta) and rainbow trout (Oncorhynchus mykiss) fry and juveniles were episodically or continuously exposed to a metals mixture (Zn, Cu, Pb, Cd): the concentrations and ratios of the metals, and variations in water quality (pH, hardness), were selected to represent conditions measured during episodic storm events in the Clark Fork River, Montana. Brown trout fry were more sensitive (lower LC50) than rainbow trout fry to the metals in 8-h exposures with constant hardness and pH, but less sensitive to elevated metal concentrations in conjunction with depressed hardness and pH.

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6

Rosenfeld, Jordan, Jeff Richards, Dave Allen, Travis Van Leeuwen, and Gauthier Monnet. "Adaptive trade-offs in fish energetics and physiology: insights from adaptive differentiation among juvenile salmonids." Canadian Journal of Fisheries and Aquatic Sciences 77, no. 7 (2020): 1243–55. http://dx.doi.org/10.1139/cjfas-2019-0350.

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Juveniles of different salmonid species often co-exist along environmental gradients, making them a useful model for identifying dominant trade-off axes and their stability within a biological hierarchy (e.g., from individuals to populations to species). In this perspective, we use multivariate trade-offs among juvenile coho salmon (Oncorhynchus kisutch) and rainbow trout (Oncorhynchus mykiss) as a case study to explore broader-scale patterns of trait association. Multivariate ordination identified a dominant trade-off axis between high growth, consumption, and growth efficiency versus high ae

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Kuchapski, Kathryn A., and Joseph B. Rasmussen. "Food chain transfer and exposure effects of selenium in salmonid fish communities in two watersheds in the Canadian Rocky Mountains." Canadian Journal of Fisheries and Aquatic Sciences 72, no. 7 (2015): 955–67. http://dx.doi.org/10.1139/cjfas-2014-0484.

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Selenium (Se) concentrations and fish biomass were examined in streams in two mined watersheds to determine if juvenile salmonids reflect local Se exposure concentrations downstream of surface coal mines and to investigate the relationship between Se exposure and toxicity effects at the fish community level. Se concentrations were measured in water, biofilm, macroinvertebrates, and muscle tissues from juvenile westslope cutthroat trout (Oncorhynchus clarkii lewisi), bull trout (Salvelinus confluentus), rainbow trout (Oncorhynchus mykiss), and brook trout (Salvelinus fontinalis) in mine-affecte

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8

Brown, Grant E., Joseph A. Brown, and Amy M. Crosbie. "Phenotype matching in juvenile rainbow trout." Animal Behaviour 46, no. 6 (1993): 1223–25. http://dx.doi.org/10.1006/anbe.1993.1313.

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9

Yau, M. M., and E. B. Taylor. "Cold tolerance performance of westslope cutthroat trout (Oncorhynchus clarkii lewisi) and rainbow trout (Oncorhynchus mykiss) and its potential role in influencing interspecific hybridization." Canadian Journal of Zoology 92, no. 9 (2014): 777–84. http://dx.doi.org/10.1139/cjz-2014-0047.

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Hybridization between rainbow trout (Oncorhynchus mykiss (Walbaum, 1792)) and westslope cutthroat trout (Oncorhynchus clarkii lewisi (Girard, 1856)) occurs commonly when rainbow trout are introduced into the range of westslope cutthroat trout. Typically, hybridization is most common in warmer, lower elevation habitats, but much less common in colder, higher elevation habitats. We assessed the tolerance to cold water temperature (i.e., critical thermal minimum, CTMin) in juvenile rainbow trout and westslope cutthroat trout to test the hypothesis that westslope cutthroat trout better tolerate lo

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10

Ward, David L., Rylan Morton-Starner, and Ben Vaage. "Effects of Turbidity on Predation Vulnerability of Juvenile Humpback Chub to Rainbow Trout and Brown Trout." Journal of Fish and Wildlife Management 7, no. 1 (2016): 205–12. http://dx.doi.org/10.3996/102015-jfwm-101.

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Abstract Predation on juvenile native fish by introduced rainbow trout Oncorhynchus mykiss and brown trout Salmo trutta is considered a significant threat to the persistence of endangered humpback chub Gila cypha in the Colorado River in Grand Canyon. Diet studies of rainbow trout and brown trout in Glen and Grand canyons indicate that these species eat native fish, but impacts are difficult to assess because predation vulnerability is highly variable depending on the physical conditions under which the predation interactions take place. We conducted laboratory experiments to evaluate how shor

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11

Brown, Grant E., and R. Jan F. Smith. "Conspecific skin extracts elicit antipredator responses in juvenile rainbow trout (Oncorhynchus mykiss)." Canadian Journal of Zoology 75, no. 11 (1997): 1916–22. http://dx.doi.org/10.1139/z97-821.

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We investigated, under laboratory conditions, the presence of chemical alarm signals in juvenile rainbow trout (Oncorhynchus mykiss). In an initial experiment, we exposed trout to a whole-body extract from conspecifics or a distilled-water control. When exposed to whole-body extract, trout significantly (i) decreased time spent swimming, (ii) increased time taken to resume foraging, and (iii) decreased the number of food items eaten. These data indicate a significant chemically mediated antipredator response. A second experiment was conducted to determine (i) if this is a generalized response

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12

Luo, Lin, Xuefeng Cai, Chuan He, Min Xue, Xiufeng Wu, and Haining Cao. "Immune response, stress resistance and bacterial challenge in juvenile rainbow trouts Oncorhynchus mykiss fed diets containing chitosan-oligosaccharides." Current Zoology 55, no. 6 (2009): 416–22. http://dx.doi.org/10.1093/czoolo/55.6.416.

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Abstract Effects of dietary supplementation of chitosan-oligosaccharides (COS) on the growth performance, immune response, stress resistance, and disease resistance of juvenile rainbow trout Oncorhynchus mykiss were studied. Four experimental diets containing 0, 20, 40, or 60 mg/kg COS (COS0, COS20, COS40, and COS60, respectively) were fed to juvenile rainbow trout (initial weight = 5.2 ± 0.3g) for 8 weeks. By the end of the feeding trial, representative groups of fish from each dietary treatment were challenged with stressor (30 sec air exposure) and pathogen exposure (intraperitoneal injecti

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13

Linton, Tyler K., I. J. Morgan, P. J. Walsh, and Chris M. Wood. "Chronic exposure of rainbow trout (Oncorhynchus mykiss) to simulated climate warming and sublethal ammonia: a year-long study of their appetite, growth, and metabolism." Canadian Journal of Fisheries and Aquatic Sciences 55, no. 3 (1998): 576–86. http://dx.doi.org/10.1139/f97-302.

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This study was conducted to assess, over the thermal cycle of an entire year, the effects (on appetite, growth, and metabolism) of a chronic small temperature increase (+2°C) and sublethal ammonia (70 µmol ·L-1) on rainbow trout (Oncorhynchus mykiss). Juvenile rainbow trout ( approx 11 g initially) were exposed for 14 months to four treatments: the natural water temperature cycle of the inshore region of Lake Ontario, this cycle +2°C to simulate a global warming scenario, and these temperature cycles in the presence of an additional 70 µmol total ammonia ·L-1 (NH3 range: 0.005-0.013 mg ·L-1).

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14

Marr, J. C. A., H. L. Bergman, J. Lipton, and C. Hogstrand. "Differences in relative sensitivity of naive and metals-acclimated brown and rainbow trout exposed to metals representative of the Clark Fork River, Montana." Canadian Journal of Fisheries and Aquatic Sciences 52, no. 9 (1995): 2016–30. http://dx.doi.org/10.1139/f95-793.

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Naive and metals-acclimated juvenile brown (Salmo trutta) and rainbow trout (Oncorhynchus mykiss) were exposed to a metals mixture containing zinc, copper, lead, and cadmium, to compare relative sensitivities to metals concentrations typical of the Clark Fork River, Montana. Differences in the survival responses (tolerance versus resistance) measured for naive fish indicated that the rainbow trout are more tolerant (higher 96-h LC50) of the metals mixture, yet the naive rainbow and brown trout showed similarities in resistance (mean time to death). Differences for metals-acclimated fish indica

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15

Chen, Thomas T., P. C. Reid, R. Van Beneden, and R. A. Sonstegard. "Effect of Aroclor 1254 and Mirex on Estradiol-lnduced Vitellogenin Production in Juvenile Rainbow Trout (Salmo gairdneri)." Canadian Journal of Fisheries and Aquatic Sciences 43, no. 1 (1986): 169–73. http://dx.doi.org/10.1139/f86-019.

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A rapid sensitive assay for vitellogenin using rocket immunoelectrophoresis was developed in juvenile rainbow trout (Salmo gairdneri) induced with 17β-estradiol. The assay detected vitellogenin serum levels as low as 0.05 mg/mL. Significant reduction of vitellogenin levels were detected in rainbow trout fed for 6 mo on diets contaminated with Aroclor 1254, Mirex, or a mixture of Aroclor 1254 and Mirex.

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16

Cunjak, Richard A., and John M. Green. "Influence of water temperature on behavioural interactions between juvenile brook charr, Salvelinus fontinalis, and rainbow trout, Salmo gairdneri." Canadian Journal of Zoology 64, no. 6 (1986): 1288–91. http://dx.doi.org/10.1139/z86-191.

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Interspecific behavioural interactions between paired brook char (Salvelinus fontinalis) and rainbow trout (Salmo gairdneri) were compared at different water temperatures to test the hypothesis that a species realizes a competitive advantage within its optimal thermal range. Three test temperatures were used: 19 °C (optimal temperature for rainbow trout), 13 °C (optimal temperature for brook charr), and 8 °C (below the optima for both species). Brook charr dominated rainbow trout at both 8 and 13 °C. At 19 °C, neither species displayed an obvious competitive advantage. The time (days) to the e

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Kenšová, Renáta, Kamila Kružíková, Jan Havránek, Danka Haruštiaková, and Zdeňka Svobodová. "Distribution of Mercury in Rainbow Trout Tissues at Embryo-Larval and Juvenile Stages." Scientific World Journal 2012 (2012): 1–6. http://dx.doi.org/10.1100/2012/652496.

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The aims of the study were to determine total mercury concentrations in “rainbow troutOncorhynchus mykiss(Walbaum)” at their embryo-larval and juvenile stages and to assess mercury concentration dynamics in individual tissues. Samples of rainbow trout were collected at two-month intervals over a period of 18 months (one stock production cycle) at the Velká Losenice trout farm. Feedstuff samples were collected at the same time and analyzed for mercury concentrations. Tissue mercury concentrations were determined in muscle, liver, and kidneys. Analyses were performed using the AMA 254 atomic abs

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18

Graynoth, E. "Determination of the age of brown and rainbow trout in a range of New Zealand lakes." Marine and Freshwater Research 47, no. 5 (1996): 749. http://dx.doi.org/10.1071/mf9960749.

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Brown trout (Salmo trutta) and rainbow trout (Oncorhynchus mykiss) from eight New Zealand lakes were aged by length-frequency analysis and by examining otoliths, pectoral fin rays and scales. Bimonthly changes in the length frequency of age classes were used to age fish for their first 2 or 3 years of life. Growth rates were highest in spring and summer, when a single wide opaque band was laid down on otoliths and fin rays, followed by a narrow transparent band in winter. Age estimates from otoliths agreed with 94-97% of those from length-frequency methods and with the ages of 21 tagged fish.

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Pavlicevic, Jerko, Ivan Bogut, Branko Glamuzina, and Nebojsa Savic. "Effects of low levels of mannanoligosaccharides in feed on growth and intestinal salmonella reduction in juvenile rainbow trout (Ocorhynchus mykiss)." Journal of Agricultural Sciences, Belgrade 60, no. 3 (2015): 339–45. http://dx.doi.org/10.2298/jas1503339p.

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Low levels of added mannanoligosaccharides (MOS) in the feed for juvenile rainbow trout significantly promote growth rate, food conversion and overall culture results. Three levels of added MOS: 0.05%, 0.10% and 0.15% were incorporated in commercial pelleted feed and fed three and later two times per day. The experiment started with juveniles of 48?2.1 grams and lasted 90 days. The best growth result was obtained with the smallest (0.05%) MOS level, if compared to the control group and 0.1% and 0.15% MOS supplemented feed. The growth was improvedby11.5% with 0.05% MOS. The best feed conversion

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20

Wagner, G. F., and B. A. McKeown. "Cyclical growth in juvenile rainbow trout, Salmo gairdneri." Canadian Journal of Zoology 63, no. 10 (1985): 2473–74. http://dx.doi.org/10.1139/z85-362.

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The growth rate (weight) of 70 juvenile rainbow trout, monitored on a weekly basis for a period of 4 months, was observed to cycle, with alternating phases of accelerated and reduced growth every 3 to 4 weeks. The significance of this phenomenon is discussed in relation to recent studies on growth physiology in rats.

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21

Rodgers, D. W. "Tritium Dynamics in Juvenile Rainbow Trout, Salmo Gairdneri." Health Physics 50, no. 1 (1986): 89–98. http://dx.doi.org/10.1097/00004032-198601000-00008.

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22

Johnsson, J. "Intersexual differences in aggression in juvenile rainbow trout." Journal of Fish Biology 52, no. 6 (1998): 1292–94. http://dx.doi.org/10.1006/jfbi.1998.0657.

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Johnsson, J. I., and A. ÅKerman. "Intersexual diVerences in aggression in juvenile rainbow trout." Journal of Fish Biology 52, no. 6 (1998): 1292–94. http://dx.doi.org/10.1111/j.1095-8649.1998.tb00973.x.

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Simpkins, Darin G., Wayne A. Hubert, Carlos Martinez del Rio, and Daniel C. Rule. "Interacting effects of water temperature and swimming activity on body composition and mortality of fasted juvenile rainbow trout." Canadian Journal of Zoology 81, no. 10 (2003): 1641–49. http://dx.doi.org/10.1139/z03-157.

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We assessed changes in proximate body composition, wet mass, and the occurrence of mortality among sedentary and actively swimming (15 cm/s) juvenile rainbow trout (Oncorhynchus mykiss) (120–142 mm total length) that were held at 4.0, 7.5, or 15.0 °C and fasted for 140 days. Warmer water temperatures and swimming activity accentuated declines in lipid mass, but they did not similarly affect lean mass and wet mass. Swimming fish conserved lean mass independent of water temperature. Because lean mass exceeded lipid mass, wet mass was not affected substantially by decreases in lipid mass. Consequ

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Brown, Grant E., and Joseph A. Brown. "Do rainbow trout and Atlantic salmon discriminate kin?" Canadian Journal of Zoology 70, no. 8 (1992): 1636–40. http://dx.doi.org/10.1139/z92-227.

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The purpose of this study was to determine if juvenile Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss) can discriminate kin from non-kin, since other salmonid species (coho salmon (Oncorhynchus kisutch) and Arctic charr (Salvelinus alpinus)) have been shown to possess this ability. When tested in water conditioned by conspecifics (kin and non-kin) and heterospecifics in a two-choice tank, both rainbow trout and Atlantic salmon demonstrated a significant preference for kin over non-kin and heterospecifics, indicating that these species possess kin-discrimination abilities.

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Fowler, Stephanie L., Diana Hamilton, and Suzanne Currie. "A comparison of the heat shock response in juvenile and adult rainbow trout (Oncorhynchus mykiss) — implications for increased thermal sensitivity with age." Canadian Journal of Fisheries and Aquatic Sciences 66, no. 1 (2009): 91–100. http://dx.doi.org/10.1139/f08-192.

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We conclude that the heat shock response is enhanced in juvenile compared with adult rainbow trout, Oncorhynchus mykiss . We have shown that the magnitude of the inducible heat shock response, as measured by increases in the heat shock protein (Hsp) Hsp70 is significantly greater in the hearts of fingerling than in adult trout following an acute (1 h) heat stress at 25 °C. Juvenile fish also express higher levels of constitutive Hsps (Hsc70, Hsp90) in their tissues, possibly reflecting higher rates of protein synthesis and increased chaperone function in this early life stage. This robust heat

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Lindholm-Lehto, Petra, Juha Koskela, Janne Kaseva, and Jouni Vielma. "Accumulation of Geosmin and 2-methylisoborneol in European Whitefish Coregonus Lavaretus and Rainbow Trout Oncorhynchus Mykiss in RAS." Fishes 5, no. 2 (2020): 13. http://dx.doi.org/10.3390/fishes5020013.

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Geosmin (GSM) and 2-methylisoborneol (MIB)-induced off-flavors can cause serious problems in a recirculating aquaculture system (RAS), such as delayed harvest and increased production costs, but also damage producers’ reputation. Traditionally, off-flavors have been removed by depuration before harvesting. Rainbow trout (Oncorhynchus mykiss) and European whitefish (Coregonus lavaretus) are commercially valuable species produced for consumers, both being suitable for rearing in RAS. In this study, European whitefish and rainbow trout were raised from juvenile up to 240 g (European whitefish) an

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Ricaud, Karine, Mickael Rey, Elisabeth Plagnes-Juan, et al. "Composition of Intestinal Microbiota in Two Lines of Rainbow Trout (Oncorhynchus Mykiss) Divergently Selected for Muscle Fat Content." Open Microbiology Journal 12, no. 1 (2018): 308–20. http://dx.doi.org/10.2174/1874285801812010308.

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Background:Recently, studies suggest that gut microbiota contributes to the development of obesity in mammals. In rainbow trout, little is known about the role of intestinal microbiota in host physiology.Objective:The aim of this study was to investigate the link between intestinal microbiota and adiposity, by high-throughput 16S RNA gene based illumina Miseq sequencing in two rainbow trout lines divergently selected for muscle lipid content. Fish from these two lines of rainbow trout are known to have a differing lipid metabolism.Methods:Samples from the two lines (L for lean and F for fat) w

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Degner, Shelee L., and Craig W. Hawryshyn. "Orientation of rainbow trout (Oncorhynchus mykiss) to multiple patches of linearly polarized light." Canadian Journal of Zoology 79, no. 3 (2001): 407–15. http://dx.doi.org/10.1139/z00-221.

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Orientation responses of juvenile rainbow trout (Oncorhynchus mykiss) to two linearly polarized light patches were examined under controlled laboratory conditions. Fish were trained to swim the length of the training tank under a polarized light field created by two linearly polarized stimuli that were oriented either parallel or perpendicular to the length of the tank. Trained fish were released in a circular tank and their angular responses were recorded. For each testing paradigm, the E-vector (electric vector) orientation of one of the two linearly polarized light patches was varied by 15°

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Michel, Christian, Heike Schmidt-Posthaus, and Patricia Burkhardt-Holm. "Suspended sediment pulse effects in rainbow trout (Oncorhynchus mykiss) — relating apical and systemic responses." Canadian Journal of Fisheries and Aquatic Sciences 70, no. 4 (2013): 630–41. http://dx.doi.org/10.1139/cjfas-2012-0376.

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To provide an integrated perspective on mineral particle effects in salmonids, juvenile rainbow trout (Oncorhynchus mykiss) were exposed to daily mica particle pulses for 8 and 24 days. On day 8, increased immature erythrocyte proportions indicated a previous stress response. This response was absent on day 24, on which condition factor as well as plasma protein and aspartate aminotransferase activity decreased. The latter two related negatively to the hepato-somatic index, suggesting metabolic adaptations. The hepato-somatic index increased on days 8 and 24, while spleen-somatic index increas

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Currie, Suzanne, Sacha LeBlanc, M. Alexandrea Watters, and Kathleen M. Gilmour. "Agonistic encounters and cellular angst: social interactions induce heat shock proteins in juvenile salmonid fish." Proceedings of the Royal Society B: Biological Sciences 277, no. 1683 (2009): 905–13. http://dx.doi.org/10.1098/rspb.2009.1562.

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Juvenile salmonid fish readily form dominance hierarchies when faced with limited resources. While these social interactions may result in profound behavioural and physiological stress, it is unknown if this social stress is evident at the level of the cellular stress response—specifically, the induction of stress or heat shock proteins (Hsps). Thus, the goal of our study was to determine if Hsps are induced during hierarchy formation in juvenile rainbow trout ( Oncorhynchus mykiss ). To this end, we measured levels of three Hsps, Hsp70, Hsc (heat shock cognate)70 and Hsp90 in the white muscle

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Hedrick, R. P., S. Yun, and W. H. Wingfield. "A Small RNA Virus Isolated from Salmonid Fishes in California, USA." Canadian Journal of Fisheries and Aquatic Sciences 48, no. 1 (1991): 99–104. http://dx.doi.org/10.1139/f91-014.

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Beginning in the summer of 1988, examinations of numerous salmonid broodstocks in northern California, USA, revealed widespread infections with a previously undescribed virus. The virus was isolated from ovarian fluids of adult rainbow trout (Oncorhynchus mykiss), cutthroat trout (O. clarki), brown trout (Salmo trutta), and brook trout (Salvelinus fontinalis) and from kidney and spleen samples of juvenile brown and brook trout. The virus was not associated with above-normal losses in adult or juvenile fish. Virions purified from infected CHSE-214 cells were hexagonal with a mean diameter of 37

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Wu, Kun, Beth M. Cleveland, Mark Portman, Wendy M. Sealey, and Xin Gen Lei. "Supplemental Microalgal DHA and Astaxanthin Affect Astaxanthin Metabolism and Redox Status of Juvenile Rainbow Trout." Antioxidants 10, no. 1 (2020): 16. http://dx.doi.org/10.3390/antiox10010016.

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Microalgal docosahexaenoic acid (DHA) and astaxanthin (AST) may substitute for fish oil and synthetic AST in aquafeeds. This study explored the effects and mechanisms of those substitutions on AST metabolism and redox status of rainbow trout fed plant protein meal (PM)- or fishmeal (FM)-based diets. Two parallel experiments (PM vs. FM) were performed with 612 juvenile rainbow trout for 16 weeks as a 2 × 3 factorial arrangement of treatments with two AST sources (synthetic (SA) vs. microalgal (AA), at 80 mg/kg) and three levels (0, 50, and 100%) of fish oil substitutions with DHA-rich microalga

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McFarlane, W. J., G. J. F. Heigenhauser, and D. G. McDonald. "Creatine supplementation affects sprint endurance in juvenile rainbow trout." Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 130, no. 4 (2001): 857–66. http://dx.doi.org/10.1016/s1095-6433(01)00448-2.

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Pavlov, D. S., E. D. Pavlov, V. V. Kostin, and E. V. Ganzha. "Influence of surfagon on rheoreaction of juvenile rainbow trout." Russian Journal of Developmental Biology 47, no. 2 (2016): 93–98. http://dx.doi.org/10.1134/s1062360416020065.

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Jönsson, Elisabeth, Jörgen I. Johnsson, and Björn Thrandur Björnsson. "Growth Hormone Increases Aggressive Behavior in Juvenile Rainbow Trout." Hormones and Behavior 33, no. 1 (1998): 9–15. http://dx.doi.org/10.1006/hbeh.1997.1426.

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Malka, Patrick, Douglas Chivers, Maud Ferrari, Grant Brown, and Christopher Jackson. "Differential retention of predator recognition by juvenile rainbow trout." Behaviour 147, no. 13-14 (2010): 1791–802. http://dx.doi.org/10.1163/000579510x535677.

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Pesonen, Maija, Lars Förlin, Tiiu Hansson, and Tommy Andersson. "Xenobiotic and steroid metabolism in juvenile rainbow trout kidney." Marine Environmental Research 24, no. 1-4 (1988): 116–17. http://dx.doi.org/10.1016/0141-1136(88)90272-3.

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Haugh, Cordula V., and Michael M. Walker. "Magnetic Discrimination Learning in Rainbow Trout (Oncorhynchus mykiss)." Journal of Navigation 51, no. 1 (1998): 35–45. http://dx.doi.org/10.1017/s0373463397007595.

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Although conditioning techniques are the most powerful way to study behavioural responses by animals to external stimuli, the magnetic sense has proved surprisingly resistant to conditioning approaches. This study demonstrated learned discrimination of magnetic field intensity stimuli by a new species, the rainbow trout (Oncorhynchus mykiss). In a unitary conditioned discrimination technique, four juvenile rainbow trout were trained to strike a target at the end of a response bar in anticipation of food. In successive experiments, the trout failed to discriminate the presence and absence of a

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Johansen, J. A., C. J. Kennedy, R. M. Sweeting, A. P. Farrell, and B. A. McKeown. "Sublethal Effects of Tetrachloroguaiacol on Juvenile Rainbow Trout, Oncorhynchus mykiss, following Acute and Chronic Exposure." Canadian Journal of Fisheries and Aquatic Sciences 51, no. 9 (1994): 1967–74. http://dx.doi.org/10.1139/f94-199.

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Following either a 24-h (acute) or 25-d (chronic) exposure to tetrachloroguaiacol (TeCG), a component of bleached kraft mill effluent (BKME), juvenile rainbow trout, Oncorhynchus mykiss, were examined for effects on several biochemical parameters, swimming performance, and disease resistance. Acute exposure resulted in increased levels of plasma cortisol and lactate and reductions in liver glycogen and protein, spleen somatic index, leucocrit, hemoglobin, swimming performance, and disease resistance. Chronic exposure resulted in most parameters remaining at control levels with the exception of

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Scott, Mark A., Rashpal S. Dhillon, Patricia M. Schulte, and Jeffrey G. Richards. "Physiology and performance of wild and domestic strains of diploid and triploid rainbow trout (Oncorhynchus mykiss) in response to environmental challenges." Canadian Journal of Fisheries and Aquatic Sciences 72, no. 1 (2015): 125–34. http://dx.doi.org/10.1139/cjfas-2013-0450.

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To determine the factors that may contribute to the poor survival of triploid (3n) rainbow trout (Oncorhynchus mykiss) in lake stocking programs, we compared the physiology and responses to environmental challenges of four wild strains and one domestic strain of diploid (2n) and 3n juvenile rainbow trout. Over four successive years, wild trout were caught from nature, spawned, and progeny were reared in a hatchery along with hatchery-bred domestic trout. Offspring of each strain were raised for up to 12 months as both 2n and 3n, and growth rate, critical swimming speed, routine oxygen consumpt

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Flamarique, Iñigo Novales, and Howard I. Browman. "Foraging and prey-search behaviour of small juvenile rainbow trout (Oncorhynchus mykiss) under polarized light." Journal of Experimental Biology 204, no. 14 (2001): 2415–22. http://dx.doi.org/10.1242/jeb.204.14.2415.

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SUMMARY Several fish species appear to be polarization sensitive, i.e. to be able to discriminate a light source’s maximum plane of polarization from any other plane. However, the functional significance of this ability remains unclear. We tested the hypothesis that polarized light improves the prey location ability of free-swimming rainbow trout (Oncorhynchus mykiss) in laboratory aquaria. We found that prey location distances increased while the vertical component of prey location angle decreased under polarized compared with unpolarized (diffuse) illumination. The average frequency distribu

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Grosell, Martin, and Chris M. Wood. "Copper uptake across rainbow trout gills." Journal of Experimental Biology 205, no. 8 (2002): 1179–88. http://dx.doi.org/10.1242/jeb.205.8.1179.

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SUMMARYSeveral components of branchial copper uptake were identified in juvenile freshwater rainbow trout (Oncorhynchus mykiss) using 64Cu. On the basis of competitive interactions between sodium and copper uptake,inhibition of copper uptake by a proton pump inhibitor (bafilomycin A1, 2μmol l-1) and a Na+ channel blocker (phenamil, 100μmol l-1), it appears that a proportion of the branchial copper uptake occurs via an apical Na+ channel. This sodium-sensitive copper uptake demonstrates saturation kinetics, with a Km of 7.1 nmol l-1 and a Jmax of 21.2 pmol g-1 h-1, and is characterized by an IC

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Harkness, J. E., N. J. Guselle, and D. J. Speare. "Demonstrated Efficacy of a Pilot Heterologous Whole-Spore Vaccine against Microsporidial Gill Disease in Rainbow Trout." Clinical and Vaccine Immunology 20, no. 9 (2013): 1483–84. http://dx.doi.org/10.1128/cvi.00340-13.

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ABSTRACTIntraperitoneal vaccines using whole viable spores of the microsporidianGlugea anomalaorGlugea hertwigireduced the numbers of branchial xenomas by 80% and 91%, respectively, after a standard experimental infection of juvenile rainbow trout with the microsporidianLoma salmonae. Similar significant results were obtained when killed-spore preparations were used.

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Saulnier, Roxanne J., Carol Best, Daniel J. Kostyniuk, Kathleen M. Gilmour, and Simon G. Lamarre. "Chronic social stress alters protein metabolism in juvenile rainbow trout, Oncorhynchus mykiss." Journal of Comparative Physiology B 191, no. 3 (2021): 517–30. http://dx.doi.org/10.1007/s00360-021-01340-6.

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AbstractWhen confined in pairs, juvenile rainbow trout (Oncorhynchus mykiss) form dominance hierarchies in which subordinate fish exhibit characteristic physiological changes including reduced growth rates and chronically elevated plasma cortisol concentrations. We hypothesized that alterations in protein metabolism contribute to the reduced growth rate of socially stressed trout, and predicted that subordinate trout would exhibit reduced rates of protein synthesis coupled with increases in protein degradation. Protein metabolism was assessed in dominant and subordinate fish after 4 days of so

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Horn, Marianna E., and Douglas P. Chivers. "Alarm cue specificity and response ontogeny in juvenile rainbow trout (Oncorhynchus mykiss)." Behaviour 154, no. 3 (2017): 377–85. http://dx.doi.org/10.1163/1568539x-00003426.

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Many aquatic prey animals release chemical cues upon being captured by a predator. These chemical cues, referred to as alarm cues, may act to warn nearby individuals of danger. For the cues to be useful, fish must be able to discern if they are indicative of a real threat; cues from conspecifics in different age groups may be irrelevant due to size- and habitat-related shifts in predation risk. We test the response of newly-hatched rainbow trout,Oncorhynchus mykiss, to three concentrations of alarm cues from conspecifics from two age groups: newly-hatched versus six-month-old juveniles. Newly-

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Erickson, Russell J., David R. Mount, Terry L. Highland, et al. "Effects of copper, cadmium, lead, and arsenic in a live diet on juvenile fish growth." Canadian Journal of Fisheries and Aquatic Sciences 67, no. 11 (2010): 1816–26. http://dx.doi.org/10.1139/f10-098.

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The effects of diet-borne copper, cadmium, lead, and arsenic on juvenile fish were evaluated using a live diet consisting of the oligochaete Lumbriculus variegatus . In 30 d exposures, no effects were observed on the growth and survival of rainbow trout ( Oncorhynchus mykiss ), fathead minnow ( Pimephales promelas ), and channel catfish ( Ictalurus punctatus ) fed diets contaminated with copper [130–310 µg Cu·(g dm)−1], cadmium [90–540 µg Cd·(g dm)−1], and lead [850–1000 µg Pb·(g dm)−1]. However, rainbow trout growth was reduced in a dose-dependent manner for diets contaminated with arsenic [2

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Smith, Charlie E. "Communications: Histopathology of Gas Bubble Disease in Juvenile Rainbow Trout." Progressive Fish-Culturist 50, no. 2 (1988): 98–103. http://dx.doi.org/10.1577/1548-8640(1988)050<0098:chogbd>2.3.co;2.

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Pettem, Connor M., Jennifer M. Briens, David M. Janz, and Lynn P. Weber. "Cardiometabolic response of juvenile rainbow trout exposed to dietary selenomethionine." Aquatic Toxicology 198 (May 2018): 175–89. http://dx.doi.org/10.1016/j.aquatox.2018.02.022.

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Kruzikova, K., R. Kensova, J. Havranek, and Z. Svobodova. "Mercury toxicokinetics during larval and juvenile stages in rainbow trout." Toxicology Letters 196 (July 2010): S288. http://dx.doi.org/10.1016/j.toxlet.2010.03.908.

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