Cristin-resultat-ID: 1620603
Sist endret: 19. desember 2018 10:34
NVI-rapporteringsår: 2018
Resultat
Vitenskapelig artikkel
2018

Allostatic Load and Stress Physiology in European Seabass (Dicentrarchus labrax L.) and Gilthead Seabream (Sparus aurata L.)

Bidragsytere:
  • Athanasios Samaras
  • Carlos Espirito Santo
  • Nikos Papandroulakis
  • Nikolaos Mitrizakis
  • Michail Pavlidis
  • Erik Höglund
  • mfl.

Tidsskrift

Frontiers in Endocrinology
ISSN 1664-2392
e-ISSN 1664-2392
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2018
Volum: 9
Artikkelnummer: 451
Open Access

Importkilder

Scopus-ID: 2-s2.0-85052204375

Beskrivelse Beskrivelse

Tittel

Allostatic Load and Stress Physiology in European Seabass (Dicentrarchus labrax L.) and Gilthead Seabream (Sparus aurata L.)

Sammendrag

The present study aimed to compare effects of increasing chronic stress load on the stress response of European seabass (Dicentrarchus labrax) and gilthead seabream (Sparus aurata) to identify neuroendocrine functions that regulate this response. Fish were left undisturbed (controls) or exposed to three levels of chronic stress for 3 weeks and then subjected to an acute stress test (ACT). Chronic stress impeded growth and decreased feed consumption in seabass, not in seabream. In seabass basal cortisol levels are high and increase with stress load; the response to a subsequent ACT decreases with increasing (earlier) load. Basal cortisol levels in seabream increase with the stress load, whereas the ACT induced a similar response in all groups. In seabass and seabream plasma α-MSH levels and brain stem serotonergic activity and turnover were similar and not affected by chronic stress. Species-specific molecular neuro-regional differences were seen. In-situ hybridization analysis of the early immediate gene cfos in the preoptic area showed ACT-activation in seabream; in seabass the expression level was not affected by ACT and seems constitutively high. In seabream, expression levels of telencephalic crf, crfbp, gr1, and mr were downregulated; the seabass hypothalamic preoptic area showed increased expression of crf and gr1, and decreased expression of mr, and this increased the gr1/mr ratio considerably. We substantiate species-specific physiological differences to stress coping between seabream and seabass at an endocrine and neuroendocrine molecular level. Seabass appear less resilient to stress, which we conclude from high basal activities of stress-related parameters and poor, or absent, responses to ACT. This comparative study reveals important aquaculture, husbandry, and welfare implications for the rearing of these species.

Bidragsytere

Athanasios Samaras

  • Tilknyttet:
    Forfatter
    ved University of Crete
  • Tilknyttet:
    Forfatter
    ved Hellenic Centre for Marine Research

Carlos Espirito Santo

  • Tilknyttet:
    Forfatter
    ved Radboud Universiteit

Nikos Papandroulakis

  • Tilknyttet:
    Forfatter
    ved Hellenic Centre for Marine Research

Nikolaos Mitrizakis

  • Tilknyttet:
    Forfatter
    ved Hellenic Centre for Marine Research

Michail Pavlidis

  • Tilknyttet:
    Forfatter
    ved University of Crete
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