Physiological stress responses of European sea bass Dicentrarchus labrax related to changing operations of floating net cages in intensive farming conditions at the Moroccan M'diq Bay

• DOI: 10.1111/jfb.15522
• Publication Date: 2023-08-09T05:40:06Z
• Authors: Soumaya Cheyadmi; Housni Chadli; Bouchra El Yamlahi; Mohammed El Maadoudi; Francesco Cacciola; Ayoub Kounnoun; Hassan Nhhala; Hicham Chairi
• Keywords: Dicentrarchus; Sea bass; Milt

The present study aimed to quantify and compare in situ the primary secondary physiological stress responses, related changing operations of floating net cages, both subadult (523 days post hatching [dph]) adult (916 dph) European sea bass Dicentrarchus labrax under intensive farming conditions Moroccan M'diq Bay. blood levels cortisol, glucose, total cholesterol, protein, lactate, as well percentage haematocrit, were measured before after this operation. results showed significantly elevated cortisol glucose age groups, whereas cholesterol protein unaffected. In fact, lactate decreased subadults, adults parameter was not affected by However, haematocrit percentages operation higher than those found groups fish, which is attributed increased rate oxygen renewal new cages lower water temperature inside cages. With regard age-specific response during essential plasma concentrations, levels, subadults adults, pre- post- measurement, with presence individual-specific response. It concluded that aquaculture practices such cage could have repercussions terms classic responses D. labrax.