Effects of incubation temperatures on embryonic and larval survival in rainbow trout, <i>Oncorhynchus mykiss</i>

Weber, Gregory M.; Martin, Kyle E.; Kretzer, Joshua; Ma, Hao; Dixon, D. George

doi:10.1080/10454438.2016.1212447

Cited by 14 publications

(2 citation statements)

References 14 publications

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“…Sixteen days after fertilization, eyed eggs of each line were distributed into small incubators installed in two separate 200-litre tanks supplied with natural spring water at either 11.4°C (control) or heated to 16°C (treatment). Several studies have shown that the optimal temperature for rainbow trout egg incubation ranged between 8 to 12°C (Billard, 1992;Baeverfjord, 2003;Weber et al, 2016), in particular to control mortalities and malformations. Some studies showed that high incubation temperatures (16°C) from fertilization to 50% hatch (Velsen, 1987) or first feeding (Baeverfjord, 2003) was associated with important mortalities.…”

Section: Biological Materialsmentioning

confidence: 99%

Sources of variation of DNA methylation in rainbow trout: combined effects of temperature and genetic background

et al. 2020

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Section: Biological Materialsmentioning

confidence: 99%

Sources of variation of DNA methylation in rainbow trout: combined effects of temperature and genetic background

et al. 2020

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“…climate change stressors, Cook et al, 2018b;Roberts et al, 2014). From a practical standpoint, elevated temperatures are also used by hatchery managers to increase egg survival and fry growth rates and therefore decrease rearing times (Baird et al, 2002;Marten, 1992), as well as manipulate hatch times (Weber et al, 2016) to increase production efficiency. Despite possible benefits, this thermal stress may cause a reduction in survival and increase in temperature-related malformations (e.g.…”

Section: Introductionmentioning

confidence: 99%

Effects of generations in captivity and elevated rearing temperature on Ontario hatchery brook trout (Salvelinus fontinalis) fry quality and survival

Wilder,

Wilson,

Warriner

et al. 2024

Environ Biol Fish

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With increasing environmental temperatures causing concern for the status of freshwater fishes, captive breeding programs may become increasingly important for conservation efforts as well as to support fisheries. Although captive broodstocks provide reliable gamete sources for production stocking, prolonged generations under hatchery conditions selection for hatchery conditions (domestication) and reduced phenotypic plasticity to novel environmental stressors. We assessed the effects of rearing temperature and number of generations spent in captivity on the survival and quality (indicated by lack of malformations) of long-term (F20+) and newly-captive (F1) strains of Ontario hatchery brook trout (Salvelinus fontinalis) with shared genetic history. We found that elevated temperatures decreased likelihood of survival between the hatched and fry stages. Additionally, we found that elevated temperature reduced fry quality of F1 fish whereas F20+ fish were less thermally sensitive, suggesting no reduction in plasticity due to captivity. The combined effects of elevated rearing temperatures and number of hatchery generations suggest that selection for captivity can occur rapidly (in one generation) even under benign conditions, and that additive stressor effects of captivity and temperature may impact newly established strains.

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Sperm quality analysis of normal season (NG) and out-season by photoperiod manipulation (PG) of male rainbow trout broodstock (Oncorhynchus mykiss)

Momin

Memiş

2018

Fish Physiol Biochem

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Sperm quality parameters in rainbow trout (Oncorhynchus mykiss) were investigated during normal season spawning (November-January) and out-season spawning (July-August) treated with artificial photoperiod manipulation. Normal spawning males (n = 15) were kept in an open concrete pond under natural condition. Out-season spawning males (n = 15) were treated with artificial LED light (50 lm/m) in a closed concrete pond. In these two experimental groups, five fish were used in each of three spawning periods. The mean weight and body length of males (2 + years, n = 30) were 1213.43 ± 39.43 g and 45.08 ± 0.62 cm, respectively. Sperms were collected from July to August 2016 in the out-season spawning or photoperiod-manipulated group (PG) (water temperature 14.21 ± 0.31 °C) and from December 2016 to January 2017, in the normal season spawning group (NG) (water temperature 8.81 ± 1.03 °C). Volume of sperm, osmolality of seminal plasma, density of sperm, percentage of motile spermatozoa (MOT), curvilinear velocity (VCL), and duration of motility were measured for each male. Seminal plasma osmolality, density of sperm, and the motility of duration were 358.47 ± 37.24 and 308.87 ± 44.09, 4.37 ± 2.10 and 9.8 ± 1.56, and 8.8 ± 2.42 and 24.6 ± 6.76 in PG and NG, respectively. Fertilization rate was 37.79 ± 9.37% and 94.51 ± 1.33% in PG and NG, respectively. Sperm quality parameters showed significant differences in most of the cases (p< 0.05) and fertilization rate at eyed egg stage (150-160 degree-days) was significantly higher in normal season spawning group than the photoperiod-manipulated group (p < 0.05). Though the rate of fertilization was low in out-season, it was able to get enough gametes in summer using only artificial light having no changes in other parameters.

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Effects of incubation temperatures on embryonic and larval survival in rainbow trout, Oncorhynchus mykiss

Cited by 14 publications

References 14 publications

Sources of variation of DNA methylation in rainbow trout: combined effects of temperature and genetic background

Sources of variation of DNA methylation in rainbow trout: combined effects of temperature and genetic background

Effects of generations in captivity and elevated rearing temperature on Ontario hatchery brook trout (Salvelinus fontinalis) fry quality and survival

Sperm quality analysis of normal season (NG) and out-season by photoperiod manipulation (PG) of male rainbow trout broodstock (Oncorhynchus mykiss)

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