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

Frontiers in Endocrinology
A SamarasMarnix Gorissen

Abstract

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 do...Continue Reading

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Citations

Feb 18, 2019·Biology of Reproduction·Pierre Comizzoli, William V Holt
Dec 29, 2020·Frontiers in Physiology·Arjan P PalstraRon P Dirks
Mar 7, 2021·Animals : an Open Access Journal From MDPI·Alexander Burren, Constanze Pietsch
May 3, 2019·Physiology & Behavior·Sébastien AlfonsoMarie-Laure Bégout
Jun 17, 2019·Developmental and Comparative Immunology·Sunita PatelManish Kumar Tripathi
Jun 3, 2021·Animals : an Open Access Journal From MDPI·Marcos Antonio López-PatiñoJuan Antonio Martos-Sitcha
Sep 1, 2021·Journal of Evolutionary Biology·Jerker VinterstareRandall Brian Langerhans

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Datasets Mentioned

BETA
AJ866727
AF139590

Methods Mentioned

BETA
PCR
electrophoresis
acetylation

Software Mentioned

GraphPad
LEICA APPLICATION SUITE
CSW
GraphPad Prism

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