Cortisol and finfish welfare

Ellis, Tim; Yıldız, Hijran Yavuzcan; López‐Olmeda, José Fernando; Spedicato, Maria Teresa; Tort, Lluís; Øverli, Øyvind; Martins, Catarina I.M.

doi:10.1007/978-94-007-5383-9_11

Cited by 40 publications

(70 citation statements)

References 200 publications

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“…Higher lactate levels probably would put limitations on oxygen transport to the tissues (Soivio et al., ). Although there were no significant differences in growth among all treatments, stress responses to tank colours were in accordance with previous results for several fish species by elevated stress hormones, glucose, lactate and haematocrit levels (Green et al., ; Mommsen et al., ; Papoutsoglou et al., ; Barton, ; Buscaino et al., ; Ellis et al., ). Similar to rainbow trout (Rahnama et al., ), the highest and the lowest plasma cortisol, glucose, lactate and blood haematocrit levels were observed in young Hucho taimen reared in red or yellow tanks, respectively.…”

Section: Discussionsupporting

confidence: 91%

Effects of tank colour on feeding, growth and stress responses of young taimenHucho taimen(Pallas, 1773)

Wang

et al. 2016

J. Appl. Ichthyol.

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Section: Discussionsupporting

confidence: 91%

Effects of tank colour on feeding, growth and stress responses of young taimenHucho taimen(Pallas, 1773)

Wang

et al. 2016

J. Appl. Ichthyol.

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“…; Ellis et al . ). The mean cortisol levels of control fish observed in this study falls within this range.…”

Section: Discussionmentioning

confidence: 97%

Stress response of Salmo salar (Linnaeus 1758) facing low abundance infestation of Caligus rogercresseyi (Boxshall & Bravo 2000), an object in the tank, and handling

Gómez

Arribas

Vargas‐Chacoff

2015

Journal of Fish Diseases

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This study looks at how low infestation loads of adult Caligus rogercresseyi and other stressors affect the physiology of Salmo salar. Experimental fish groups were with (infested) or without (control) exposure to the parasite. The parasite cohort was followed for 78 days post-infestation (dpi), and only adult lice were observed. Additional stressors were applied at 60 and 75 dpi. The analysis included measurements of fish physiology and weight. Low-level infestations by adult C. rogercresseyi for more than 50 dpi induced moderate stress in S. salar as well as a high energy demand and increased small skin mucous cells. Threshold lice loads were identified, and above those loads, a high stress response was observed. Additional stressors altered fish physiology, inducing downregulation of the cortisol response after the first stressor and upregulation after the second stressor, but infested fish responded more strongly. Parasitism by C. rogercresseyi is energetically demanding, affecting the primary and secondary responses (e.g. cortisol and glucose levels), as well as the tertiary response (fish weight).

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“…Cortisol release rates in experiment 2 increased from days 1 to 3, and fell dramatically on day 4. This drop in cortisol on day 4 could indicate either acclimation or negative feedback inhibition in response to the procedure (Fryer & Peter, ; Bradford et al , ; Schreck, ; Ellis et al , ). While negative feedback inhibition can be induced in under 4 days (Medeiros & McDonald, ), differentiating between acclimation and negative feedback would require understanding the mechanisms through which cortisol release rates were reduced on day 4.…”

Section: Discussionmentioning

confidence: 99%

The relationship between handling time and cortisol release rates changes as a function of brain parasite densities in California killifishFundulus parvipinnis

Weinersmith

Hanninen

Sih

et al. 2016

Journal of Fish Biology

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This study validated a technique for non-invasive hormone measurements in California killifish Fundulus parvipinnis, and looked for associations between cortisol (a stress hormone) and 11-ketotestosterone (KT, an androgen) release rates and the density or intensity of the trematode parasites Euhaplorchis californiensis (EUHA) and Renicola buchanani (RENB) in wild-caught, naturally infected F. parvipinnis. In experiment 1, F. parvipinnis were exposed to an acute stressor by lowering water levels to dorsal-fin height and repeatedly handling the fish over the course of an hour. Neither parasite was found to influence cortisol release rates in response to this acute stressor. In experiment 2, different F. parvipinnis were exposed on four consecutive days to the procedure for collecting water-borne hormone levels and release rates of 11-KT and cortisol were quantified. This design examined whether F. parvipinnis perceived the water-borne collection procedure to be a stressor, while also exploring how parasites influenced hormone release rates under conditions less stressful than those in experiment 1. No association was found between RENB and hormone release rates, or between EUHA and 11-KT release rates. The interaction between EUHA density and handling time, however, was an important predictor of cortisol release rates. The relationship between handling time and cortisol release rates was negative for F. parvipinnis harbouring low or intermediate density infections, and became positive for fish harbouring high densities of EUHA.

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Cortisol and finfish welfare

Cited by 40 publications

References 200 publications

Effects of tank colour on feeding, growth and stress responses of young taimenHucho taimen(Pallas, 1773)

Effects of tank colour on feeding, growth and stress responses of young taimenHucho taimen(Pallas, 1773)

Stress response of Salmo salar (Linnaeus 1758) facing low abundance infestation of Caligus rogercresseyi (Boxshall & Bravo 2000), an object in the tank, and handling

The relationship between handling time and cortisol release rates changes as a function of brain parasite densities in California killifishFundulus parvipinnis

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