Physiological and oxidative stress response of goldfish Carassius auratus induced by a light dimming system

Ryu, Han Seok; Song, Jin Ah; Park, Heung-Sik; Choi, Young Jae; Choi, Cheol Young

doi:10.1007/s10695-019-00733-3

Cited by 9 publications

(3 citation statements)

References 27 publications

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“…The fish were given approximately two weeks (December 26 th , 2018 -January 11 th , 2019) to acclimate to the constant (24h) light and test temperature (14.4 ± 0.1°C; mean ± SE; range 13.7-15.0°C), during which they were fed 0.6% of tank biomass once daily using 5mm pellets of a salmonid-specific (high protein) diet formulation (Corey Aquafeeds, Fredericton, New Brunswick). Constant light was used to avoid the physiological stress response observed in fish exposed to abrupt on-off light transitions (Ryu et al 2019). This is also consistent with aquaculture practices, as 24h lighting increases growth rates and delays sexual maturation (Harmon et al 2003).…”

Section: Rearing Informationmentioning

confidence: 84%

Triploidy affects postprandial ammonia excretion but not specific dynamic action in 1+ brook charr, Salvelinus fontinalis

et al. 2021

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The use of sterile triploids in aquaculture is currently limited because of reduced performance in situations of aerobic stress such as high temperature, hypoxia, and exhaustive exercise. Many studies have therefore attempted to find underlying metabolic differences between triploids and their diploid counterparts to improve triploid rearing protocols. This study investigated the effects of triploidy on postprandial metabolism (and therefore also pre-feeding standard metabolic rate; SMR) by measuring oxygen uptake and total ammonia nitrogen (TAN) excretion at 14-15°C of previously fasted (for eight days) diploid and triploid brook charr, Salvelinus fontinalis, from 48h before to 48h after being fed a single ration of 0.4% body mass.Triploids had significantly lower SMRs and higher postprandial metabolic rates (i.e., specific dynamic action) and net TAN excretion than diploids. While this greater cost of processing a

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Section: Rearing Informationmentioning

confidence: 84%

Triploidy affects postprandial ammonia excretion but not specific dynamic action in 1+ brook charr, Salvelinus fontinalis

et al. 2021

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“…Hence, various biomarkers can be measured in the plasma of fish. Ryu et al [ 48 ] found differences in plasma levels of SOD and CAT in goldfish ( Carassius auratus ) stimulated at various light intensities, but these differences were not significant. In the present study, ACP was highly active in plasma, and the trend of changes in the other six enzymes also reached a significant level, possibly due to the ferociously carnivorous nature of S. chuatsi and a stronger stress response.…”

Section: Discussionmentioning

confidence: 99%

Study on the Adaptive Regulation of Light on the Stress Response of Mandarin Fish (Siniperca chuatsi) with Re-Feeding after Starvation

Zhou

Huang

et al. 2023

Animals

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Light influences the stress response to environmental stimuli and feeding behaviors of Siniperca chuatsi and, thus, is an important regulator of normal growth and development. In this study, we first explored the important role of light on the digestive and stress capacity of S. chuatsi by studying the changes in physiological and biochemical indicators of S. chuatsi, taking the re-feeding after starvation as the constant environmental stimulus and the light intensity as the adjustable environmental stimulus. The activity of protease and lipase was generally higher in the stomach tissues than in the intestinal tissues, especially lipase, which was higher in stomach tissues under all light conditions, and the protease and lipase activity peaked in the stomach tissues of S. chuatsi at a light intensity of 18.44 ± 3.00 lx and in intestinal tissues at 11.15 ± 2.01 lx, respectively, indicating that greater light intensity increased the digestive capacity of stomach tissues, whereas lower light intensity facilitated the digestive capacity of intestinal tissues. The tissues of the gill, stomach, and intestine had relatively high activity of stress-related enzymes, whereas the tissues of the brain, kidney, liver, and plasma samples had relatively low activity of enzymes. Collectively, the results show that light intensity at 11.15 ± 2.01 lx promoted digestive capacity in the intestine and enhanced the anti-stress ability of S. chuatsi in response to stress induced by re-feeding after starvation. These findings should prove useful for artificial breeding of S. chuatsi.

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“…They were held at UNB Saint John in 400 litre circular fibreglass holding tanks supplied with flow-through dechlorinated freshwater (∼15°C) and fed dry pellets (1.8 mm Gemma, Skretting, St Andrews, NB, Canada) to satiety three times per week. During holding and both experiments, fish were always under a winter photoperiod (10 h:14 h light:dark) typical for temperate latitudes; a simulated sunrise and sunset (30 min each) were included in the lighting period to minimize potential effects of sudden lighting changes on behaviour ( Ryu et al, 2020 ).…”

Section: Methodsmentioning

confidence: 99%

Environmental variation associated with overwintering elicits marked metabolic plasticity in a temperate salmonid, Salvelinus fontinalis

Middleton,

Gilbert,

Landry

et al. 2024

Journal of Experimental Biology

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Poleward winters commonly expose animals, including fish, to frigid temperatures and low food availability. Fishes that remain active over winter must therefore balance trade-offs between conserving energy and maintaining physiological performance in the cold, yet the extent and underlying mechanisms of these trade-offs are not well understood. We investigated the metabolic plasticity of brook char (Salvelinus fontinalis), a temperate salmonid, from the biochemical to whole-animal level in response to cold and food deprivation. Acute cooling (1°C day−1) from 14°C to 2°C had no effect on food consumption but reduced activity by 77%. We then assessed metabolic performance and demand over 90 days with exposure to warm (8°C) or cold winter (2°C) temperatures while fed or starved. Resting metabolic rate (RMR) decreased substantially during initial cooling from 8°C to 2°C (Q10=4.2– 4.5) but brook char exhibited remarkable thermal compensation during acclimation (Q10=1.4 – 1.6). Conversely, RMR was substantially lower (40-48%) in starved fish, conserving energy. Thus, the absolute magnitude of thermal plasticity may be masked or modified under food restriction. This reduction in RMR was associated with atrophy and decreases in in vivo protein synthesis rates, primarily in non-essential tissues. Remarkably, food deprivation had no effect on maximum oxygen uptake rates and thus aerobic capacity, supporting the notion that metabolic capacity can be decoupled from RMR in certain contexts. Overall, our study highlights the multi-faceted energetic flexibility of Salvelinus spp. that likely contributes to their success in harsh and variable environments and may be emblematic of winter-active fishes more broadly.

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Physiological and oxidative stress response of goldfish Carassius auratus induced by a light dimming system

Cited by 9 publications

References 27 publications

Triploidy affects postprandial ammonia excretion but not specific dynamic action in 1+ brook charr, Salvelinus fontinalis

Triploidy affects postprandial ammonia excretion but not specific dynamic action in 1+ brook charr, Salvelinus fontinalis

Study on the Adaptive Regulation of Light on the Stress Response of Mandarin Fish (Siniperca chuatsi) with Re-Feeding after Starvation

Environmental variation associated with overwintering elicits marked metabolic plasticity in a temperate salmonid, Salvelinus fontinalis

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