Línea de tiempo de las concentraciones plasmáticas de cortisol y glucosa en lisa (Mugil cephalus) categorizados de acuerdo a estilo de afrontamiento al estrés de tipo proactivo y reactivo

In fishes, cortisol is a hormone related to stress that intervenes in metabolic and physiological processes that prepare animals for a possible flight or confrontation. In fish farming, organisms are exposed to stressful conditions that may affect their health and survival. In aquaculture, fish are exposed to constant stressful situations that could affect welfare and quality. The objective of this study was to monitor plasma concentrations of cortisol and glucose in Mugil cephalus during a period of 24 hours after exposure to an acute stress. Additionally, the stress coping style behaviour was characterized to determine the impact of presenting proactive or reactive responses to stress. Cortisol concentration peak appeared at 15 min post-stress and glucose plasma was observed at 30 min post-stress. Homeostatic state was got back at 120 min post-stress for both cortisol and glucose blood concentrations. Proactive fish, presented a significantly lower cortisol level elevation than reactive fish after stress exposure and got their homeostatic state back faster than reactive fish. These results may be of interest to the aquaculture industry to improve welfare and management protocols.