Chronic stress under commercial aquaculture conditions: Scale cortisol to identify and quantify potential stressors in milkfish (Chanos chanos) mariculture

Hanke, Inken; Hassenrück, Christiane; Ampe, Bart; Kunzmann, Andreas; Gärdes, Astrid; Aerts, Johan

doi:10.1016/j.aquaculture.2020.735352

Cited by 29 publications

(19 citation statements)

References 40 publications

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“…According to the sampling size of this study, neither the size:species interactions nor the size:location interactions were found to be significant (p = 0.5 & 0.6, respectively). Cortisol in scales has been proven to be an effective marker of chronic stress in various fish species (Aerts et al 2015;Carbajal et al 2019;Laberge et al 2019;Hanke et al 2020). Yet, the mechanisms of cortisol clearance in scales are not well described, and to our knowledge, only one recent study on goldfish (Carassius auratus) has provided insights regarding its rate (Laberge et al 2019).…”

Section: Resultsmentioning

confidence: 99%

Measuring cortisol in fish scales to study stress in wild tropical tuna

et al. 2021

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skipjack (mean 4.75 ± 6.56 ng g −1 ) than in yellowfin (mean 1.65 ± 1.85 ng g −1 ), although the difference was mainly due to four skipjack individuals. Larger datasets would be needed to confirm any species difference in cortisol concentration. The particularly high cortisol concentration observed in four individuals may be due to fish from different schools, suggesting the need for future sampling from free-swimming schools to investigate intra-and inter-school variability in cortisol concentration. This study opens the door for future research, including the collection of scales on tagged individuals, to investigate the links between chronic stress and behavior in these species.

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Section: Resultsmentioning

confidence: 99%

Measuring cortisol in fish scales to study stress in wild tropical tuna

et al. 2021

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“…While management and water quality parameters have been shown to affect scale cortisol levels (Hanke et al, 2019(Hanke et al, , 2020, this is the first study to identify a correlation between scale cortisol and fin injuries. As scale cortisol forms a new tool for the quantification of chronic stress available literature is scarce.…”

Section: Scale Cortisol Is Positively Correlated To Fin Injuriesmentioning

confidence: 92%

“…Short-term plasma cortisol increases are a reaction to acute stressors and can be beneficial, while long-term elevations as observed in chronic stress can result in exhaustion of the stress response and a reduced fish performance, reduced reproduction, increased susceptibility to disease, higher mortality, and in general decreased welfare (Iwama et al, 1997;Barton, 2002;Schreck and Tort, 2016). As cortisol accumulates in elasmoid scales of teleost fish, scale cortisol provides a retrospective view on cortisol excretion (Aerts et al, 2015), and has been shown as a biomarker for chronic stress in various species (Aerts et al, 2015;Laberge et al, 2019;Hanke et al, 2019Hanke et al, , 2020. Scale cortisol is hence a promising tool to assess fish welfare from a stress physiological point of view.…”

Section: Introductionmentioning

confidence: 99%

Scale cortisol is positively correlated to fin injuries in rainbow trout (Oncorhynchus mykiss) reared in commercial flow through systems

Weirup

Schulz

Seibel³

et al. 2021

Aquaculture

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“…In terms of physiological stress indicators, although plasma cortisol is considered a good indicator of acute stress in fish, its capacity to depict situations of chronic stress is in general questioned (Madaro et al., 2015; Samaras et al., 2018; Samaras et al., 2021). Recently, concentrations of cortisol in fish scales have been described as a potent indicator of chronic stress (Aerts et al 2015; Samaras et al 2021) and/or stressful culture conditions (Goikoetxea et al., 2021; Hanke et al., 2020). However, no study has until now performed on cortisol determination in red seabream scales.…”

Section: Introductionmentioning

confidence: 99%

Physiological responses of red seabream ( Pagrus major ) to stress and rearing temperature

Σαμαράς

Dimitroglou²,

Gleni

et al. 2022

Aquaculture Research

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The stress physiology and welfare needs of red seabream, a fish species with high nutritional and economic value for aquaculture, have been poorly studied. The aim of the current study was to investigate physiological responses of red seabream to potential environmental and husbandry stress factors. We quantified the acute stress response of fish exposed to a standardized acute chasing stress protocol as well as to transportation stress, by analysing acute stress biomarkers such as plasma concentrations of cortisol, glucose, lactate and osmolality. Moreover, the physiological status of fish reared at different water temperatures (15, 20 and 25°C) was also studied by analysing plasma parameters and cortisol concentration in scales. Results showed that in most estimated parameters, red seabream showed a fast response and recovery to acute stress. On the contrary, recovery after an 18‐h transportation stress was prolonged and required more than one day. Finally, rearing of fish at different temperatures also affected stress indicators such as plasma cortisol and glucose, while lactate and osmolality were not significantly affected. Regarding cortisol concentration in fish scales, a chronic stress indicator, results showed that fish reared at 15°C had a significantly higher cortisol concertation of scales than those exposed to 25°C. The data provide a better insight into the effect of husbandry and environmental factors on red sea bream stress physiology and welfare.

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Chronic stress under commercial aquaculture conditions: Scale cortisol to identify and quantify potential stressors in milkfish (Chanos chanos) mariculture

Cited by 29 publications

References 40 publications

Measuring cortisol in fish scales to study stress in wild tropical tuna

Measuring cortisol in fish scales to study stress in wild tropical tuna

Scale cortisol is positively correlated to fin injuries in rainbow trout (Oncorhynchus mykiss) reared in commercial flow through systems

Physiological responses of red seabream ( Pagrus major ) to stress and rearing temperature

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