Cortisol Extraction from Sturgeon Fin and Jawbone Matrices

Nejad, Jalil Ghassemi; Ataallahi, Mohammad; Salmanzadeh, Mohammad H.; Park, Kyung T.; Lee, Hong G.; Shoae, Alireza; Rahimi, Atieh; Sung, Kyung Il; Park, Kyu H.

doi:10.3791/59961-v

Cited by 4 publications

(4 citation statements)

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“…Sample processing was performed according to protocols adapted from previous methods (Ghassemi Nejad et al ., 2019) with some modification. Mucus samples stored in a -20 °C freezer, were thawed to room temperature before processing.…”

Section: Methodsmentioning

confidence: 99%

“…Measurements of cortisol concentrations from mucus and fin have been used as less-invasive methods for stress monitoring (Simontacchi et al ., 2008; Bertotto et al ., 2009; De Mercado et al ., 2018; Ghassemi Nejad et al ., 2019). Simontacchi et al (2008) evaluated plasma cortisol levels in European sea bass subjected to different pre-slaughter conditions.…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of endogenous and water cortisol release in Asian SeabassLates calcariferafter acute stress in a farm scale recirculating aquaculture system

Tan,

Aung,

Salleh

et al. 2023

Preprint

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Stress in farmed fish is associated with poor feeding, slow growth, disease, and mortality. Therefore, it is essential to closely monitor the stress levels in fish to optimize farming practices which could then enhance productivity and welfare in aquaculture operations. Cortisol, a stress hormone that can be found in the blood, is a reliable biomarker for evaluating fish stress. As blood sampling is highly invasive, alternative cortisol sampling methods such as fin, mucus, and the surrounding water which contains released cortisol, have been proposed as less invasive or non-invasive sampling methods. However, a comprehensive understanding of their temporal dynamics and associations with plasma cortisol levels is still lacking. In this study, we subjected Lates calcarifer, Asian sea bass within a farm-scale (3,000 L tank, 9,000 L system) high-flow rate (8,000 L/hour) Recirculating Aquaculture System (RAS) to an acute handling stress challenge specifically involving chasing and air exposure, and quantified cortisol dynamics both within different biological samples including blood, fin, and mucus and in tank water from multiple sampling points. We showed that handling stress induced an expected increase in plasma and mucosal cortisol, peaking at 4 hours and 24-48 hours, respectively, and that plasma and mucus cortisol were moderately correlated, especially during the stress period. Fin cortisol did not show consistent dynamics. Water cortisol similarly rose, but peaked within 40 minutes from the start of the stressor, in a pattern that was dependent on the site of sampling within the RAS system, likely due to RAS circulation dynamics. Our study is the first to examine the impact of stress on cortisol accumulation and release in Asian Sea bass in a farm-scale RAS, thus providing insights that complement existing research on the efficacy of fin, mucus, and water cortisol as stress indicators that could help optimize aquaculture productivity and welfare.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamics of endogenous and water cortisol release in Asian SeabassLates calcariferafter acute stress in a farm scale recirculating aquaculture system

Tan,

Aung,

Salleh

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…sufficient for chronic stress detection, whereas multiple measurements are required for detection using liquid biomatrices [8].…”

Section: A C C E P T E Dmentioning

confidence: 99%

“…the high extraction yield of earwax cortisol with MA may be due to the solvent properties of MA, such as its polarity and lower molecular weight, which facilitates more efficient extraction of earwax cortisol [8].…”

Section: A C C E P T E Dmentioning

confidence: 99%