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FIGURE 3 in Habitat associations of rainbow trout Oncorhynchus mykiss and brown trout Salmo trutta fry

FIGURE 3 Salmo trutta fry abundances from the four sites in which three pass removals were conducted in July through October 2018 and associations with D50 and presence of wood. The trendline shows the relationship between S. trutta fry abundance and D50 in the three sites in which wood was absent () Wood () No Wood

FIGURE 5 in Habitat associations of rainbow trout Oncorhynchus mykiss and brown trout Salmo trutta fry

FIGURE 5 Oncorhynchus mykiss fry abundances from the four sites in which three pass removals were conducted in July through October 2018 and associations with (a) velocity and (b) depth. A trendline shows the relationship between each habitat variable and the fry abundance data for both the sites that were stocked (dotted line) and not stocked (solid line) () Not Stocked () Stocked

FIGURE 1 in Habitat associations of rainbow trout Oncorhynchus mykiss and brown trout Salmo trutta fry

FIGURE 1 Fry site locations used to obtain abundance estimates or single-pass counts for Salmo trutta and Oncorhynchus mykiss in the upper Colorado River study section in Grand County, Colorado, downstream of Windy Gap Reservoir. The 20 15.2 m sites, sampled five times from July through October 2018, included one abundance estimation and four single-pass sites at the Sheriff Ranch, four single-pass sites at Kinney Creek, two abundance estimation and five single-pass sites in the Red Barn area and one abundance estimation and three single-pass sites at Hitching Post

FIGURE 2 in Habitat associations of rainbow trout Oncorhynchus mykiss and brown trout Salmo trutta fry

FIGURE 2 Salmo trutta fry single-pass counts and associations with (a) D50, (b) depth and (c) velocity

FIGURE 4 in Habitat associations of rainbow trout Oncorhynchus mykiss and brown trout Salmo trutta fry

FIGURE 4 Oncorhynchus mykiss fry counts from sites in which O. mykiss were or were not (i.e., natural reproduction) stocked and associations with (a) D50 and (b) velocity. A trendline shows the relationship between each habitat variable and the fry count data for both the sites that were stocked (dotted line) and not stocked (solid line) () Not Stocked () Stocked

opencc-by-4.0May 2023View details →

FIGURE 2 in The thermal dependence of the protein-sparing effect in rainbow trout (Oncorhynchus mykiss, Walbaum 1792)

FIGURE 2 Ammonia quotient (AQ) of rainbow trout (Oncorhynchus mykiss) fed three isonitrogenous diets with different energy contents [high energy (HE) = 20.50 MJ kg 1, medium energy (ME) = 18.76 MJ kg 1, low energy (LE) = 17.35 MJ kg 1) at five temperatures (12 C, 14 C, 16 C, 18 C, 20 C). A quadratic dependency model was used to analyse the data. Parabolas describe the quadratic dependency of AQ values on temperature. Calculated lowest AQ values for each parabola are marked with a cross (). Each data point represents the measurement of one tank with rainbow trout at each respective diet and temperature. (n = 3)

opencc-by-4.0May 2023View details →

FIGURE 1 in The thermal dependence of the protein-sparing effect in rainbow trout (Oncorhynchus mykiss, Walbaum 1792)

FIGURE 1 Percentage of retainable energy (RE) relative to gross energy intake (GEI) of rainbow trout (Oncorhynchus mykiss) fed three isonitrogenous diets with different energy contents [high energy (HE) = 20.50 MJ kg 1, medium energy (ME) = 18.76 MJ kg 1, low energy (LE) = 17.35 MJ kg 1) at five temperatures (12 C, 14 C, 16 C, 18 C, 20 C). Each data point represents measurement of one tank with rainbow trout at each respective diet and temperature (n = 3)

opencc-by-4.0Dec 2017View details →

Fig. 1 in Survival Of Embryos And Larvae Of The Rainbow Trout (Oncorhynchus Mykiss, Walbaum, 1792) Under Influence Of Optical Radiation At Various Temperature Regimes

Fig. 1. Linear dependencies of the probit (logit) effect of the death of rainbow trout larvae in vitro from the logarithm of days of fasting for various types of optical radiation at a temperature of 12 (a), 11 (b), 10 (c), 9 (d), 8(e) ° C.

opencc-by-4.0Apr 2020View details →

Dataset for "Diets supplemented with Saccharina latissima influence the expression of genes related to lipid metabolism and oxidative stress modulating rainbow trout (Oncorhynchus mykiss) fillet composition" (doi.org/10.1016/j.fct.2020.111332)

Dataset corresponding to the following article: Ferreira, M., Larsen, B.K., Granby, K., Cunha, S.C., Monteiro, C., Fernandes, J.O., Nunes, M.L., Marques, A., Dias, J., Cunha, I., Castro, L.F.C., Valente, L.M.P., 2020. Diets supplemented with Saccharina latissima influence the expression of genes related to lipid metabolism and oxidative stress modulating rainbow trout (Oncorhynchus mykiss) fillet composition. Food Chem. Toxicol. 140, 111332. <a href="https://doi.org/10.1016/j.fct.2020.111332">https://doi.org/10.1016/j.fct.2020.111332</a>

opencc-zeroDec 2020View details →

Growth genes are implicated in the evolutionary divergence of sympatric piscivorous and insectivorous rainbow trout (Oncorhynchus mykiss)

Identifying ecologically significant phenotypic traits and the genomic mechanisms that underly them are crucial steps in understanding the traits associated with population divergence. We used genome-wide data to identify genomic regions associated with a key trait that distinguishes two ecotypes of rainbow trout (Oncorhynchus mykiss) – insectivores and piscivores – that coexist in Kootenay Lake, southeastern British Columbia, for the non-breeding portion of the year. "Gerrards" are large-bodied (breeding maturity at >60cm) piscivores that spawn 50km north of Kootenay Lake in the Lardeau River, in contrast to the insectivorous populations that are on average smaller in body size, mainly forage on aquatic insects, and spawn in tributaries immediately surrounding Kootenay Lake. We used pool-seq data covering 60 percent of the genome to assess the level of genomic divergence between ecotypes, test for genotype-phenotype associations, and identify loci that may play functional or selective roles in their divergence. Analysis of nearly seven million SNPs provided a genome-wide mean FST estimate of 0.18, indicating a high level of reproductive isolation between populations. The window-based FST analysis did not reveal "islands" of genomic differentiation; however, the window with highest FST estimate did include a gene associated with insulin secretion. Although we explored the use of the "Local score" approach to identify genomic outlier regions, this method was ultimately not used because simulations revealed a high false discovery rate (20 percent). Gene Ontology (GO) analysis identified several growth processes as enriched in genes occurring in the 200 most divergent genomic windows, indicating the importance of genetically-based growth and growth-related metabolic functions in the divergence of these ecotypes. In spite of their sympatric coexistence, a high degree of genomic differentiation separates the populations of piscivores and insectivores, indicating little to no contemporary genetic exchange between ecotypes. Our results further indicate that the large body piscivorous 27 phenotype is likely not due to one or a few loci of large effect, rather it may be controlled by several loci of small effect, thus highlighting the power of whole-genome low-coverage sequencing in phenotypic association studies.

opencc-zeroJul 2023View details →

Data from: Personality determines population-level effects of microplastics consumption in a modelled population of stream-dwelling rainbow trout (Oncorhynchus mykiss)

Microplastics in freshwater habitats are consumed by fish, including stream-dwelling salmonids, which can alter food consumption or negatively affect swimming and foraging behaviour. As population-level effects are largely unknown, a simulated population of stream-dwelling rainbow trout (Oncorhynchus mykiss) was created using the agent-based model 'inSTREAM 7' to model population-level effects (biomass) of behavioural changes caused by microplastics consumption. Individual fish were assigned all possible combinations of two personality traits (dominance, boldness/shyness), and consumed microplastics while foraging, while their abundance, body size, and microplastics consumption were tracked for three different life stages (fry, juvenile, adult) for a 10-year simulation period. Three additive scenarios were explored: a low-impact scenario with decreased food consumption, a medium-impact scenario with added lower swimming speed, and a high-impact scenario with added reductions in prey capture efficiency. Each was tested with microplastics concentrations of 0%, 1% (i.e., current levels), and 3% (i.e., future levels) of drift food. Overall, microplastics consumption did not strongly affect trout population abundance. Dominant adult trout consumed disproportionally more microplastics than all other fish, especially with higher microplastics concentrations. Different personality types were affected differently in the three scenarios: dominant and bold adults were smaller when food consumption was reduced, shy and subordinate adults were smaller when swimming speed was lowered, and all dominant adults, regardless of boldness, were smaller when foraging efficiency was impeded, with dominant and bold fry also less abundant in this scenario. However, effects on fish body size were only found with microplastic concentrations of 3%, indicating these outcomes can be prevented, as current levels of microplastics pollution are unlikely to affect salmonid body size. Nevertheless, microplastics ingestion represents an additional stressor that may potentially interact with a myriad of anthropogenic impacts that already affect wild salmonid populations.

publicAug 2021View details →

Growth genes are implicated in the evolutionary divergence of sympatric piscivorous and insectivorous rainbow trout (Oncorhynchus mykiss)

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publicJan 2025View details →

Differences in gene expression between high and low tolerance rainbow trout (Oncorhynchus mykiss) to acute thermal stress

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publicSep 2025View details →

Quantifying component mortality estimates of out-migrating juvenile steelhead (Oncorhynchus mykiss)

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